Cisco IOS Voice Command Reference

periodic-report interval

To configure periodic reporting parameters for gateway resource entities, use the periodic-report interval command in voice-class configuration mode. To disable the periodic reporting parameters configuration, use the no form of this command.

periodic-report interval seconds

no periodic-report interval seconds

Syntax Description

Command Default

The periodic interval report parameters are disabled.

Command Modes

Voice-class configuration mode (config-class)

Command History

Usage Guidelines

Use the periodic-report interval command to periodically report the status of the monitoring resources to the external entity. The triggering takes place based on the preconfigured interval value. You can use the statistics collected by this method of reporting to collect information on resource usage.

Examples

The following example shows how to configure a resource group to trigger reporting every 180 seconds:

Router> enable

Router# configure terminal

Router(config)# voice class resource-group 1

Router(config-class)# periodic-report interval 180

Related Commands

permit hostname (SIP)

To store hostnames used during validatation of initial incoming INVITE messages, use the permit hostname command in SIP-ua configuration mode. To remove a stored hostname, use the no form of this command.

permit hostname dns: domain name

no permit hostname

Syntax Description

Command Modes

SIP-ua configuration

Command History

Usage Guidelines

The permit hostname command allows you to specify hostnames in FQDN (fully qualified domain name) format used during validation of incoming initial INVITE messages. The length of the hostname can be up to 30 characters; hostnames exceeding 30 characters will be truncated. You can store up to 10 hostnames by repeating the permit hostname command.

Once configured, initial INVITEs with a hostname in the requested Universal Resource Identifier (URI) are compared to the configured list of hostnames. If there is a match, the INVITE is processed; if there is a mismatch, a "400 Bad Request - Invalid Host" is sent, and the call is rejected.

Note Before Software Release 12.4(9)T, hostnames in incoming INVITE-request messages were only validated when they were in IPv4 format; now you can specify hostnames in fully qualified domain name (FQDN) format.

Examples

The following example show you how to set the hostname to sip.example.com:

Router(config)# sip-ua

Router(conf-sip-ua)# permit hostname dns:sip.example.com

phone context

To filter out uniform resource identifiers (URIs) that do not contain a phone-context field that matches the configured pattern, use the phone context command in voice URI class configuration mode. To remove the pattern, use the no form of this command.

phone context phone-context-pattern

no phone context

Syntax Description

Command Default

No default behavior or values

Command Modes

Voice URI class configuration

Command History

Usage Guidelines

•Use this command with at least one other pattern-matching command, such as host, phone number, or user-id; using it alone does not result in any matches on the voice class.

•You cannot use this command if you use the pattern command in the voice class. The pattern command matches on the entire URI, whereas this command matches only a specific field.

Examples

The following example sets a match on the phone context in the URI voice class:

voice class uri 10 tel

 phone number ^408

 phone context 555

Related Commands

phone number

To match a call based on the phone-number field in a telephone (TEL) uniform resource identifier (URI), use the phone number command in voice URI class configuration mode. To remove the pattern, use the no form of this command.

phone number phone-number-pattern

no phone number

Syntax Description

Command Default

No default behavior or values

Command Modes

Voice URI class configuration

Command History

Usage Guidelines

•Use this command only in a voice class for TEL URIs.

•You cannot use this command if you use the pattern command in the voice class. The pattern command matches on the entire URI, whereas this command matches only a specific field.

Examples

The following example defines a voice class that matches on the phone number field in a TEL URI:

voice class uri r101 tel

 phone number ^408

Related Commands

pickup direct

To define a feature code for a Feature Access Code (FAC) to access Pickup Direct on an analog phone, use the pickup direct command in STC application feature access-code configuration mode. To return the code to its default, use the no form of this command.

pickup direct keypad-character

no pickup direct

Syntax Description

Command Default

The default value is 6.

Command Modes

STC application feature access-code configuration (config-stcapp-fac)

Command History

Usage Guidelines

This command changes the value of the feature code for Pickup Direct from the default (6) to the specified value.

In Cisco IOS Release 12.4(20)YA and later releases, if the length of the keypad-character argument is at least two characters and the leading or ending character of the string is an asterisk (*) or a number sign (#), phone users are not required to dial a prefix to access this feature. Typically, phone users dial a feature access code (FAC) consisting of a prefix plus a feature code, for example **6. If the feature code is 78#, the phone user dials only 78#, without the FAC prefix, to access the corresponding feature.

In Cisco IOS Release 15.0(1)M and later releases, if the length of the keypad-character argument is three or four digits, phone users are not required to dial a prefix or any special characters to access this feature. Typically, phone users dial a special feature access code (FAC) consisting of a prefix plus a feature code, for example **2. If the feature code is 788, the phone user dials only 788, without the FAC prefix, to access the corresponding feature.

In Cisco IOS Release 12.4(20)YA and later releases, if you attempt to configure this command with a value that is already configured for another feature code, a speed-dial code, or the Redial FSD, you receive a message. If you configure a duplicate code, the system implements the first matching feature in the order of precedence shown in the output of the show stcapp feature codes command.

In Cisco IOS Release 12.4(20)YA and later releases, if you attempt to configure this command with a value that precludes or is precluded by another FAC, a speed-dial code, or the Redial FSD, you receive a message. If you configure a feature code to a value that precludes or is precluded by another code, the system always executes the call feature with the shortest code and ignores the longer code. For example, #1 will always preclude #12 and #123. You must configure a new value for the precluded code in order to enable phone user access to that feature.

To display a list of all FACs, use the show stcapp feature codes command.

Note This FAC is not supported by Cisco Unified Communications Manager.

Examples

The following example shows how to change the value of the feature code for Pickup Direct from the default (6). This configuration also changes the value of the prefix for all FACs from the default (**) to ##. With this configuration, a phone user must press ##3 on the keypad and then the ringing extension number to pick up an incoming call.

Router(config)# stcapp feature access-code

Router(config-stcapp-fac)# prefix ##

Router(config-stcapp-fac)# pickup direct 3

Router(config-stcapp-fac)# exit

Related Commands

pickup group

To define a feature code for a feature access code (FAC) to access Group Call Pickup on an analog phone, use the pickup group command in STC application feature access-code configuration mode. To return the code to its default, use the no form of this command.

pickup group keypad-character

no pickup group

Syntax Description

Command Default

The default value is 4.

Command Modes

STC application feature access-code configuration (config-stcapp-fac)

Command History

Usage Guidelines

This command changes the value of the feature code for Pickup Direct from the default (4) to the specified value.

In Cisco IOS Release 12.4(20)YA and later releases, if the length of the keypad-character argument is at least two characters and the leading or ending character of the string is an asterisk (*) or a number sign (#), phone users are not required to dial a prefix to access this feature. Typically, phone users dial a special feature access code (FAC) consisting of a prefix plus a feature code, for example **4. If the feature code is 78#, the phone user dials only 78#, without the FAC prefix, to access the corresponding feature.

In Cisco IOS Release 12.4(20)YA and later releases, if you attempt to configure this command with a value that is already configured for another feature code, a speed-dial code, or the Redial FSD, you receive a message. If you configure a duplicate code, the system implements the first matching feature in the order of precedence shown in the output of the show stcapp feature codes command.

In Cisco IOS Release 12.4(20)YA and later releases, if you attempt to configure this command with a value that precludes or is precluded by another feature code, a speed-dial code, or the Redial FSD, you receive a message. If you configure a feature code to a value that precludes or is precluded by another code, the system always executes the call feature with the shortest code and ignores the longer code. For example, #1 will always preclude #12 and #123. You must configure a new value for the precluded code in order to enable phone user access to that feature.

To display a list of all FACs, use the show stcapp feature codes command.

Examples

The following example shows how to change the value of the feature code for Pickup Direct from the default (4). This configuration also changes the value of the prefix for all FACs from the default (**) to ##. After these values are configured, a phone user must press ##3 on the keypad, then the pickup-group number for the ringing extension number to pick up the incoming call.

Router(config)# stcapp feature access-code

Router(config-stcapp-fac)# prefix ##

Router(config-stcapp-fac)# pickup direct 3

Router(config-stcapp-fac)# exit

Related Commands

pickup local

To define a a feature code for a Feature Access Code (FAC) to access Group Call Pickup for a local group on an analog phone, use the pickup local command in STC application feature access-code configuration mode. To return the code to its default, use the no form of this command.

pickup local keypad-character

no pickup local

Syntax Description

Command Default

The default value is 3.

Command Modes

STC application feature access-code configuration (config-stcapp-fac)

Command History

Usage Guidelines

This command changes the value of the feature code for Local Group Pickup from the default (3) to the specified value.

In Cisco IOS Release 12.4(20)YA and later releases, if the length of the keypad-character argument is at least two characters and the leading or ending character of the string is an asterisk (*) or a number sign (#), phone users are not required to dial a prefix to access this feature. Typically, phone users dial a special feature access code (FAC) consisting of a prefix plus a feature code, for example **3. If the feature code is 78#, the phone user dials only 78#, without the FAC prefix, to access the corresponding feature.

In Cisco IOS Release 15.0(1)M and later releases, if the length of the keypad-character argument is three or four digits, phone users are not required to dial a prefix or any special characters to access this feature. Typically, phone users dial a special feature access code (FAC) consisting of a prefix plus a feature code, for example **2. If the feature code is 788, the phone user dials only 788, without the FAC prefix, to access the corresponding feature.

In Cisco IOS Release 12.4(20)YA and later releases, if you attempt to configure this command with a value that is already configured for another feature code or speed-dial code, or for the Redial FSD, you receive a message. If you configure a duplicate code, the system implements the first matching feature in the order of precedence shown in the output of the show stcapp feature codes command.

In Cisco IOS Release 12.4(20)YA and later releases, if you attempt to configure this command with a value that precludes or is precluded by another feature code or speed-dial code, or by the Redial FSD, you receive a message. If you configure a feature code to a value that precludes or is precluded by another code, the system always executes the call feature with the shortest code and ignores the longer code. For example, #1 will always preclude #12 and #123. You must configure a new value for the precluded code in order to enable phone user access to that feature.

To display a list of all FACs, use the show stcapp feature codes command.

Examples

The following example shows how to change the value of the feature code for Pickup Direct from the default (3). This configuration also changes the value of the prefix for all FACs from the default (**) to ##. With this configuration, a phone user must press ##9 on the keypad to pick up an incoming call in the same group as this extension number.

Router(config)# stcapp feature access-code

Router(config-stcapp-fac)# prefix ##

Router(config-stcapp-fac)# pickup local 9

Router(config-stcapp-fac)# exit

Related Commands

playout-delay (dial peer)

To tune the playout buffer on digital signal processors (DSPs) to accommodate packet jitter caused by switches in the WAN, use the playout-delay command in dial peer configuration mode. To reset the playout buffer to the default, use the no form of this command.

playout-delay {fax milliseconds | maximum milliseconds | minimum {default | low | high} | nominal milliseconds}

no playout-delay {fax | maximum | minimum | nominal}

Syntax Description

Defaults

fax—300 milliseconds
maximum—200 milliseconds
minimum—default (40 milliseconds)
nominal—60 milliseconds

Command Modes

Dial peer configuration (config-dial-peer)

Command History

Usage Guidelines

Before Cisco IOS Release 12.1(5)T, this command was used in voice-port configuration mode. For Cisco IOS Release 12.1(5)T and later releases, in most cases playout delay should be configured in dial-peer configuration mode on the Voice over IP (VoIP) dial peer that is on the receiving end of the voice traffic that is to be buffered. This dial peer senses network conditions and relays them to the DSPs, which adjust the jitter buffer as necessary. When multiple applications are configured on the gateway, playout delay should be configured in dial-peer configuration mode. When there are numerous dial peers to configure, it might be simpler to configure playout delay on a voice port. If conflicting playout-delay values have been configured on a voice port and on a dial peer, the dial-peer configuration takes precedence.

Playout delay is the amount of time that elapses between the time at which a voice packet is received at the jitter buffer on the DSP and the time at which it is played out to the codec. In most networks with normal jitter conditions, the defaults are adequate and you will not need to configure this command.

In situations in which you want to improve voice quality by reducing jitter or you want to reduce network delay, you can configure playout-delay parameters. The parameters are slightly different for each of the two playout-delay modes, adaptive and fixed (see the playout-delay mode command).

In adaptive mode, the average delay for voice packets varies depending on the amount of interarrival variation that packets have as the call progresses. The jitter buffer grows and shrinks to compensate for jitter and to keep voice packets playing out smoothly, within the maximum and minimum limits that have been configured. The maximum limit establishes the highest value to which the adaptive delay is set. The minimum limit is the low-end threshold for the delay of incoming packets by the adaptive jitter buffer. Algorithms in the DSPs that control the growth and shrinkage of the jitter buffer are weighted toward the improvement of voice quality at the expense of network delay: jitter buffer size increases rapidly in response to spikes in network transmissions and decreases slowly in response to reduced congestion.

In fixed mode, the nominal value is the amount of playout delay applied at the beginning of a call by the jitter buffer in the gateway and is also the maximum size of the jitter buffer throughout the call.

As a general rule, if there is excessive breakup of voice due to jitter with the default playout-delay settings, increase playout delay times. If your network is small and jitter is minimal, decrease playout-delay times for a smaller overall delay.

When there is bursty jitter in the network, voice quality can be degraded even though the jitter buffer is actually adjusting the playout delay correctly. The constant readjustment of playout delay to erratic network conditions causes voice quality problems that are usually alleviated by increasing the minimum playout delay-value in adaptive mode or by increasing the nominal delay for fixed mode.

Use the show call active voice command to display the current delay, as well as high- and low-water marks for delay during a call. Other fields that can help determine the size of a jitter problem are ReceiveDelay, GapFillWith..., LostPackets, EarlyPackets, and LatePackets. The following is sample output from the show call active voice command:

VOIP:

 ConnectionId[0xECDE2E7B 0xF46A003F 0x0 0x47070A4]

 IncomingConnectionId[0xECDE2E7B 0xF46A003F 0x0 0x47070A4]

 RemoteIPAddress=192.168.100.101

 RemoteUDPPort=18834

 RoundTripDelay=26 ms

 SelectedQoS=best-effort

 tx_DtmfRelay=inband-voice

 FastConnect=TRUE

 Separate H245 Connection=FALSE

 H245 Tunneling=FALSE

 SessionProtocol=cisco

 SessionTarget=

 OnTimeRvPlayout=417000

 GapFillWithSilence=850 ms

 GapFillWithPrediction=2590 ms

 GapFillWithInterpolation=0 ms

 GapFillWithRedundancy=0 ms

 HiWaterPlayoutDelay=70 ms

 LoWaterPlayoutDelay=29 ms

 ReceiveDelay=39 ms

 LostPackets=0

 EarlyPackets=0

 LatePackets=86

Examples

The following example uses default adaptive mode with a minimum playout delay of 10 ms and a maximum playout delay of 60 ms on VoIP dial peer 80. The size of the jitter buffer is adjusted up and down on the basis of the amount of jitter that the DSP finds, but is never smaller than 10 ms and never larger than 60 ms.

dial-peer 80 voip

 playout-delay minimum low

 playout-delay maximum 60

Related Commands

playout-delay (voice-port)

To tune the playout buffer to accommodate packet jitter caused by switches in the WAN, use the playout-delay command in voice-port configuration mode. To reset the playout buffer to the default, use the no form of this command.

playout-delay {fax | maximum | nominal} milliseconds

no playout-delay {fax | maximum | nominal}

Syntax Description

Defaults

fax—300 milliseconds
maximum—160 milliseconds
nominal—80 milliseconds

Command Modes

Voice-port configuration

Command History

Usage Guidelines

If there is excessive breakup of voice due to jitter with the default playout delay settings, increase the delay times. If your network is small and jitter is minimal, decrease the delay times to reduce delay.

Before Cisco IOS Release 12.1(5)T, the playout-delay command was configured in voice-port configuration mode. For Cisco IOS Release 12.1(5)T and later releases, in most cases playout delay should be configured in dial-peer configuration mode on the Voice over IP (VoIP) dial peer that is on the receiving end of the voice traffic that is to be buffered. This dial peer senses network conditions and relays them to the DSPs, which adjust the jitter buffer as necessary. When multiple applications are configured on the gateway, playout delay should be configured in dial-peer configuration mode. When there are numerous dial peers to configure, it might be simpler to configure playout delay on a voice port. If conflicting playout-delay values have been configured on a voice port and on a dial peer, the dial-peer configuration takes precedence.

Playout delay is the amount of time that elapses between the time at which a voice packet is received at the jitter buffer on the DSP and the time at which it is played out to the codec. In most networks with normal jitter conditions, the defaults are adequate and you will not need to configure the playout-delay command.

In situations in which you want to improve voice quality by reducing jitter or you want to reduce network delay, you can configure playout-delay parameters. The parameters are slightly different for each of the two playout-delay modes, adaptive and fixed (see the playout-delay mode command).

In adaptive mode, the average delay for voice packets varies depending on the amount of interarrival variation that packets have as the call progresses. The jitter buffer grows and shrinks to compensate for jitter and to keep voice packets playing out smoothly, within the maximum and minimum limits that have been configured. The maximum limit establishes the highest value to which the adaptive delay will be set. The minimum limit is the low-end threshold for incoming packet delay that is created by the adaptive jitter buffer. Algorithms in the DSPs that control the growth and shrinkage of the jitter buffer are weighted toward the improvement of voice quality at the expense of network delay: jitter buffer size increases rapidly in response to spikes in network transmissions and decreases slowly in response to reduced congestion.

In fixed mode, the nominal value is the amount of playout delay applied at the beginning of a call by the jitter buffer in the gateway and is also the maximum size of the jitter buffer throughout the call.

As a general rule, if there is excessive breakup of voice due to jitter with the default playout-delay settings, increase playout-delay times. If your network is small and jitter is minimal, decrease playout-delay times for a smaller overall delay.

When there is bursty jitter in the network, voice quality can be degraded even though the jitter buffer is actually adjusting the playout delay correctly. The constant readjustment of playout delay to erratic network conditions causes voice quality problems that are usually alleviated by increasing the minimum playout-delay value in adaptive mode or by increasing the nominal delay for fixed mode.

Note The minimum limit for playout delay is configured using the playout-delay (dial peer) command.

Use the show call active voice command to display the current delay, as well as high- and low-water marks for delay during a call. Other fields that can help determine the size of a jitter problem are GapFillWith..., ReceiveDelay, LostPackets, EarlyPackets, and LatePackets. The following is sample output from the show call active voice command:

VOIP:

 ConnectionId[0xECDE2E7B 0xF46A003F 0x0 0x47070A4]

 IncomingConnectionId[0xECDE2E7B 0xF46A003F 0x0 0x47070A4]

 RemoteIPAddress=192.168.100.101

 RemoteUDPPort=18834

 RoundTripDelay=26 ms

 SelectedQoS=best-effort

 tx_DtmfRelay=inband-voice

 FastConnect=TRUE

 Separate H245 Connection=FALSE

 H245 Tunneling=FALSE

 SessionProtocol=cisco

 SessionTarget=

 OnTimeRvPlayout=417000

 GapFillWithSilence=850 ms

 GapFillWithPrediction=2590 ms

 GapFillWithInterpolation=0 ms

 GapFillWithRedundancy=0 ms

 HiWaterPlayoutDelay=70 ms

 LoWaterPlayoutDelay=29 ms

 ReceiveDelay=39 ms

 LostPackets=0

 EarlyPackets=0

 LatePackets=86

Examples

The following example sets nominal playout delay to 80 ms and maximum playout delay to 160 ms on voice port 1/0/0:

voice-port 1/0/0

 playout-delay nominal 80

 playout-delay maximum 160

Related Commands

playout-delay mode (dial peer)

To select fixed or adaptive mode for playout delay from the jitter buffer on digital signal processors (DSPs), use the playout-delay mode command in dial peer configuration mode. To reset to the default, use the no form of this command.

playout-delay mode {adaptive | fixed}

no playout-delay mode

Syntax Description

Command Default

Adaptive jitter buffer size

Command Modes

Dial peer configuration

Command History

Usage Guidelines

Before Cisco IOS Release 12.1(5)T, this command was used only in voice-port configuration mode. For Cisco IOS Release 12.1(5)T and later releases, in most cases playout delay should be configured in dial peer configuration mode on the VoIP dial peer that is on the receiving end of the voice traffic that is to be buffered. This dial peer senses network conditions and relays them to the DSPs, which adjust the jitter buffer as necessary. When multiple applications are configured on the gateway, playout delay should be configured in dial peer configuration mode.

Tip When there are numerous dial peers to configure, it might be simpler to configure playout delay on a voice port. If conflicting playout delay values have been configured on a voice port and on a dial peer, the dial peer configuration takes precedence.

In most networks with normal jitter conditions, the default is adequate and you do not need to configure this command.

The default is adaptive mode, in which the average delay for voice packets varies depending on the amount of interarrival variation that packets have as the call progresses. The jitter buffer grows and shrinks to compensate for jitter and to keep voice packets playing out smoothly, within the maximum and minimum limits that have been configured.

Select fixed mode only when you understand your network conditions well, and when you have a network with very poor quality of service (QoS) or when you are interworking with a media server or similar transmission source that tends to create a lot of jitter at the transmission source. In most situations it is better to configure adaptive mode and let the DSP size the jitter buffer according to current conditions.

Examples

The following example sets adaptive playout-delay mode with a high (80 ms) minimum delay on a VoIP dial peer 80:

dial-peer 80 voip

 playout-delay mode adaptive

 playout-delay minimum high

Related Commands

playout-delay mode (voice-port)

To select fixed or adaptive mode for playout delay from the jitter buffer on digital signal processors (DSPs), use the playout-delay mode command in voice port configuration mode. To reset to the default, use the no form of this command.

playout-delay mode {adaptive | fixed}

no playout-delay mode

Syntax Description

Command Default

Adaptive jitter buffer size

Command Modes

Voice-port configuration

Command History

Usage Guidelines

Before Cisco IOS Release 12.1(5)T, this command was used only in voice-port configuration mode. For Cisco IOS Release 12.1(5)T and later releases, in most cases playout delay should be used in dial peer configuration mode on the VoIP dial peer that is on the receiving end of the voice traffic that is to be buffered. This dial peer senses network conditions and relays them to the DSPs, which adjust the jitter buffer as necessary. When multiple applications are configured on the gateway, playout delay should be configured in dial peer configuration mode.

Tip When there are numerous dial peers to configure, it might be simpler to configure playout delay on a voice port. If conflicting playout delay values have been configured on a voice port and on a dial peer, the dial peer configuration takes precedence.

In most networks with normal jitter conditions, the default is adequate and you do not need to configure the playout-delay mode command.

The default is adaptive mode, in which the average delay for voice packets varies depending on the amount of interarrival variation that packets have as the call progresses. The jitter buffer grows and shrinks to compensate for jitter and to keep voice packets playing out smoothly, within the maximum and minimum limits that have been configured.

Select fixed mode only when you understand your network conditions well, and when you have a network with very poor quality of service (QoS) or when you are interworking with a media server or similar transmission source that tends to create a lot of jitter at the transmission source. In most situations it is better to configure adaptive mode and let the DSP size the jitter buffer according to current conditions.

Examples

The following example sets fixed mode on a Cisco 3640 voice port with a nominal delay of 80 ms.

voice-port 1/1/0

 playout-delay mode fixed

 playout-delay nominal 80

Related Commands

port (Annex G neighbor BE)

To configure the port number of the neighbor that is used for exchanging Annex G messages, use the port command in Annex G Neighbor BE configuration mode. To remove the port number, use the no form of this command.

port neighbor-port

no port

Syntax Description

Defaults

2099

Command Modes

Annex G Neighbor BE configuration

Command History

Usage Guidelines

When cofiguring the no port command the neighbor-port argument is not used.

Examples

The following example sets a neighbor BE to port number 2010.

Router(config-annexg-neigh)# port 2010

Related Commands

port (dial-peer)

To associate a dial peer with a specific voice port, use the port command in dial peer configuration mode. To cancel this association, use the no form of this command.

Cisco 1750 and Cisco 3700 Series

port slot-number/port

no port slot-number/port

Cisco 2600 Series, Cisco 3600 Series, and Cisco 7200 Series

port {slot-number/subunit-number/port | slot/port:ds0-group-number}

no port {slot-number/subunit-number/port | slot/port:ds0-group-number}

Cisco AS5300 and Cisco AS5800

port controller-number:D

no port controller-number:D

Cisco uBR92x Series

port slot/subunit/port

no port slot/subunit/port

Syntax Description

Cisco 1750 and Cisco 3700 Series

Cisco 2600 Series, Cisco 3600 Series, and Cisco 7200 Series

Cisco AS5300

Cisco uBR92x series

Command Default

No port is configured.

Command Modes

Dial peer configuration

Command History

Usage Guidelines

This command enables calls that come from a telephony interface to select an incoming dial peer and for calls that come from the VoIP network to match a port with the selected outgoing dial peer.

This command applies only to POTS peers.

Note This command does not support the extended EC feature on the Cisco AS5300.

Examples

The following example associates POTS dial peer 10 with voice port 1, which is located on subunit 0 and accessed through port 0:

dial-peer voice 10 pots

 port 1/0/0

The following example associates POTS dial peer 10 with voice port 0:D:

dial-peer voice 10 pots

 port 0:D

The following example associates POTS dial peer 10 with voice port 1/0/0:D (T1 card):

dial-peer voice 10 pots

 port 1/0/0:D

Related Commands

port (MGCP profile)

To associate a voice port with the Media Gateway Control Protocol (MGCP) profile that is being configured, use the port command in MGCP profile configuration mode. To disassociate the voice port from the profile, use the no form of this command.

port port-number

no port port-number

Syntax Description

Command Default

No default behavior or values

Command Modes

MGCP profile configuration

Command History

Usage Guidelines

This command is used when values for an MGCP profile are configured.

This command associates a voice port with the MGCP profile that is being defined. To associate multiple voice ports with a profile, repeat this command with different voice port arguments.

This command is not used when the default MGCP profile is configured because the values in the default profile configuration apply to all parameters that have not been otherwise configured for a user-defined MGCP profile.

Examples

The following example associates an analog voice port with an MGCP profile on a Cisco uBR925 platform:

Router(config)# mgcp profile ny110ca

Router(config-mgcp-profile)# port 0

Related Commands

port (supplementary-service)

To enter the supplementary-service voice-port configuration mode for associating a voice port with STC application supplementary-service features, use the port command in supplementary-service configuration mode. To cancel the association, use the no form of this command.

port port

no port port

Syntax Description

Command Default

This command has no default behavior or values.

Command Modes

Supplementary-service configuration (config-stcapp-suppl-serv)

Command History

Usage Guidelines

This command associates an analog FXS port to STC application supplementary-service features being configured.

Examples

The following example shows how to enable Hold/Resume on analog endpoints connected to port 2/0 of a Cisco VG224.

Router(config)# stcapp supplementary-services

Router(config-stcapp-suppl-serv)# port 2/0

Router(config-stcapp-suppl-serv-port)# hold-resume

Router(config-stcapp-suppl-serv-port)# end

Related Commands

port media

To specify the serial interface to which the local video codec is connected for a local video dial peer, use the port media command in video dial peer configuration mode. To remove any configured locations from the dial peer, use the no form of this command.

port media interface

no port media

Syntax Description

Command Default

No interface is specified

Command Modes

Video dial peer configuration

Command History

Examples

The following example specifies serial interface 0 as the specified interface for the codec local video dial peer 10:

dial-peer video 10 videocodec

 port media Serial0

Related Commands

port signal

To specify the slot location of the video dialing module (VDM) and the port location of the EIA/TIA-366 interface for signaling for a local video dial peer, use the port signal command in video dial peer configuration mode. To remove any configured locations from the dial peer, use the no form of this command.

port signal slot/port

no port signal

Syntax Description

Command Default

No locations are specified

Command Modes

Video dial peer configuration

Command History

Examples

The following example sets up the VDM and EIA/TIA-366 interface locations for the local video dial peer designated as 10:

dial-peer video 10 videocodec

 port signal 1/0

Related Commands

pots call-waiting

To enable the local call-waiting feature, use the global configuration pots call-waiting command in global configuration mode. To disable the local call-waiting feature, use the no form of this command.

pots call-waiting {local | remote}

no pots call-waiting {local | remote}

Syntax Description

Command Default

Remote, in which case the call- holding pattern follows the settings of the service provider rather than those of the router.

Command Modes

Global configuration

Command History

Usage Guidelines

To display the call-waiting setting, use the show running-config or show pots status command. The ISDN call waiting service is used if it is available on the ISDN line connected to the router even if local call waiting is configured on the router. That is, if the ISDN line supports call waiting, the local call waiting configuration on the router is ignored.

Examples

The following example enables local call waiting on a router:

pots call-waiting local

Related Commands

pots country

To configure your connected telephones, fax machines, or modems to use country-specific default settings for each physical characteristic, use the pots country command in global configuration mode. To disable the use of country-specific default settings, use the no form of this command.

pots country country

no pots country country

Syntax Description

Command Default

A default country is not defined.

Command Modes

Global configuration

Command History

Usage Guidelines

This command applies to the Cisco 800 series routers.

If you need to change a country-specific default setting of a physical characteristic, you can use the associated command listed in the "Related Commands" section. Enter the pots country ? command to get a list of supported countries and the code you must enter to indicate a particular country.

Examples

The following example specifies that the devices connected to the telephone ports use default settings specific to Germany for the physical characteristics:

pots country de

Related Commands

pots dialing-method

To specify how the router collects and sends digits dialed on your connected telephones, fax machines, or modems, use the pots dialing-method command in global configuration mode. To disable the specified dialing method, use the no form of this command.

pots dialing-method {overlap | enblock}

no pots dialing-method {overlap | enblock}

Syntax Description

Command Default

The default depends on the setting of the pots country command. For more information, see the pots country command.

Command Modes

Global configuration

Command History

Usage Guidelines

This command applies to Cisco 800 series routers.

To interrupt the collection and transmission of dialed digits, enter a pound sign (#), or stop dialing digits until the interdigit timer runs out (10 seconds).

Examples

The following example specifies that the router uses the enblock dialing method:

pots dialing-method enblock

Related Commands

pots disconnect-supervision

To specify how a router notifies the connected telephones, fax machines, or modems when the calling party has disconnected, use the pots disconnect-supervision command in global configuration mode. To disable the specified disconnect method, use the no form of this command.

pots disconnect-supervision {osi | reversal}

no pots disconnect-supervision {osi | reversal}

Syntax Description

Command Default

The default depends on the setting of the pots country command. For more information, see the pots country command.

Command Modes

Global configuration

Command History

Usage Guidelines

This command applies to Cisco 800 series routers.

Most countries except Japan typically use the osi option. Japan typically uses the reversal option.

Examples

The following example specifies that the router uses the OSI disconnect method:

pots disconnect-supervision osi

Related Commands

pots disconnect-time

To specify the interval in which the disconnect method is applied if your connected telephones, fax machines, or modems fail to detect that a calling party has disconnected, use the pots disconnect-time command in global configuration mode. To disable the specified disconnect interval, use the no form of this command.

pots disconnect-time interval

no pots disconnect-time interval

Syntax Description

Command Default

The default depends on the setting of the pots country command. For more information, see the pots country command.

Command Modes

Global configuration

Command History

Usage Guidelines

This command applies to Cisco 800 series routers.

The pots disconnect-supervision command configures the disconnect method.

Examples

The following example specifies that the connected devices apply the configured disconnect method for 100 ms after a calling party disconnects:

pots disconnect-time 100

Related Commands

pots distinctive-ring-guard-time

To specify the delay in which a telephone port can be rung after a previous call is disconnected, use the pots distinctive-ring-guard-time command in global configuration mode. To disable the specified delay, use the no form of this command.

pots distinctive-ring-guard-time milliseconds

no pots distinctive-ring-guard-time milliseconds

Syntax Description

Command Default

The default depends on the setting of the pots country command. For more information, see the pots country command.

Command Modes

Global configuration

Command History

Usage Guidelines

This command applies to Cisco 800 series routers.

Examples

The following example specifies that a telephone port can be rung 100 ms after a previous call is disconnected:

pots distinctive-ring-guard-time 100

Related Commands

pots encoding

To specify the pulse code modulation (PCM) encoding scheme for your connected telephones, fax machines, or modems, use the pots encoding command in global configuration mode. To disable the specified scheme, use the no form of this command.

pots encoding {alaw | ulaw}

no pots encoding {alaw | ulaw}

Syntax Description

Command Default

The default depends on the setting of the pots country command. For more information, see the pots country command.

Command Modes

Global configuration

Command History

Usage Guidelines

This command applies to Cisco 800 series routers.

Europe typically uses a-law. North America typically uses u-law.

Examples

The following example specifies a-law as the PCM encoding scheme:

pots encoding alaw

Related Commands

pots forwarding-method

To configure the type of call-forwarding method to be used for Euro-ISDN (formerly NET3) switches, use the pots forwarding-method command in global configuration mode. To turn forwarding off, use the no form of this command.

pots forwarding-method {keypad | functional}

no pots forwarding-method {keypad | functional}

Syntax Description

Command Default

Forwarding is off

Command Modes

Global configuration

Command History

Usage Guidelines

Use this command to select the type of forwarding method to be used for Euro-ISDN switches. This command does not affect any other switch types.

You can select one or more call-forwarding services at a time, but keep the following Euro-ISDN switch characteristics in mind:

•Call forward unconditional (CFU) redirects a call without restriction and takes precedence over other call-forwarding service types.

•Call forward busy (CFB) redirects a call to another number if the dialed number is busy.

•Call forward no reply (CFNR) forwards a call to another number if the dialed number does not answer within a specified period of time.

If all three call-forwarding services are enabled, CFU overrides CFB and CFNR. The default is that no call-forwarding service is selected.

If you select the functional forwarding method, use the DTMF keypad commands in Table 34 to configure the call-forwarding service.

When you enable or disable the call-forwarding service, it is enabled or disabled for four basic services: speech, audio at 3.1 kilohertz (kHz), telephony at 3.1 kHz, and telephony at 7 kHz. You should hear a dial tone after you enter the DTMF keypad command when the call-forwarding service is successfully enabled for at least one of the four basic services. If you hear a busy tone, the command is invalid or the switch does not support that service.

Examples

The following example gives forwarding control to the router:

pots forwarding-method functional

Related Commands

pots line-type

To specify the impedance of your connected telephones, fax machines, or modems, use the pots line-type command in global configuration mode. To disable the specified line type, use the no form of this command.

pots line-type {type1 | type2 | type3}

no pots line-type {type1 | type2 | type3}

Syntax Description

Command Default

The default depends on the setting of the pots country command. For more information, see the pots country command.

Command Modes

Global configuration

Command History

Usage Guidelines

This command applies to Cisco 800 series routers.

Examples

The following example sets the line type to type1:

pots line-type type1

Related Commands

pots prefix filter

To set a filter that prevents a dial prefix from being added to a dialed number when the digits in the dialed number match the filter, use the pots prefix filter command in global configuration mode. To remove the filter, use the no form of this command.

pots prefix filter number

no pots prefix filter number

Syntax Description

Command Default

No default filter is set.

Command Modes

Global configuration

Command History

Usage Guidelines

The pots prefix filter command is used to set a filter for prefix dialing. A maximum of ten filters can be set. Once the maximum number of filters have been configured, an additional filter is not accepted nor does it overwrite any of the existing filters.

To configure a new filter, remove at least one filter using the no pots prefix filter command.

You can set matching criteria for the filter using the * wildcard character. For example, if you configure the filter 1* and a dialed number starts with 1, the called number is not prefixed. Prefix filters can be of variable length. All configured prefix filters are compared to the number dialed, up to the length of the prefix filter. If there is a match, no prefix is added to the dialed number.

Examples

The following example configures five filters that prevent dial prefixes from being added to dialed numbers:

pots prefix filter 192

pots prefix filter 1

pots prefix filter 9

pots prefix filter 0800

pots prefix filter 08456

With these filters configured, a prefix is not added to the following dialed numbers:

192 Directory calls

100 Operator services

999 Emergency services

0800... Toll-free calls

08456...Calls on an Energis network information controller

Related Commands

pots prefix number

To set a prefix to be added to a called telephone number for analog or modem calls, use the pots prefix number command in global configuration mode. To remove the prefix, use the no form of this command.

pots prefix number number

no pots prefix number number

Syntax Description

Command Default

No prefix is associated with the called number for analog or modem calls

Command Modes

Global configuration

Command History

Usage Guidelines

Only one prefix can be configured using this command. If a prefix already exists, the next prefix configured with this command overwrites the old prefix. Prefixes can be of variable length, up to five digits. The no pots prefix number command removes the prefix.

As numbers are dialed on the keypad, a comparison is made to the configured prefix filter. When a match is determined, the number is dialed without adding the prefix. In the unlikely event that the prefix filter has more digits than the dialed number, and the dialed number matches the first digits of the prefix filter, the prefix is not added to the dialed number. For example, if the prefix filter is 5554000 and you dial 555 and stop, the router considers the called number to be 555 and does not add a prefix to the number. This event is unlikely to occur because the number of digits in dialed numbers is typically greater than the number of digits in prefix filters.

Examples

The following example sets the prefix to 12345:

pots prefix number 12345

This prefix is added to any number dialed for analog or modem calls that do not match the prefix filter.

Related Commands

pots ringing-freq

To specify the frequency on the Cisco 800 series router at which connected telephones, fax machines, or modems ring, use the pots ringing-freq command in global configuration mode. To disable the specified frequency, use the no form of this command.

pots ringing-freq {20Hz | 25Hz | 50Hz}

no pots ringing-freq {20Hz | 25Hz | 50Hz}

Syntax Description

Command Default

The default depends on the setting of the pots country command. For more information, see the pots country command.

Command Modes

Global configuration

Command History

Usage Guidelines

This command applies to Cisco 800 series routers.

Examples

The following example sets the ringing frequency to 50 Hz:

pots ringing-freq 50Hz

Related Commands

pots silence-time

To specify the interval of silence after a calling party disconnects, use the pots silence-time command in global configuration mode. To disable the specified silence time, use the no form of this command.

pots silence-time interval

no pots silence-time interval

Syntax Description

Command Default

The default depends on the setting of the pots country command. For more information, see the pots country command.

Command Modes

Global configuration

Command History

Usage Guidelines

This command applies to Cisco 800 series routers.

Examples

The following example sets the interval of silence to 10 seconds:

pots silence-time 10

Related Commands

pots tone-source

To specify the source of dial, ringback, and busy tones for your connected telephones, fax machines, or modems, use the pots tone-source command in global configuration mode. To disable the specified source, use the no form of this command.

pots tone-source {local | remote}

no pots tone-source {local | remote}

Syntax Description

Command Default

Local (router supplies the tones)

Command Modes

Global configuration

Command History

Usage Guidelines

This command applies to Cisco 800 series routers.

This command applies only to ISDN lines connected to a EURO-ISDN (NET3) switch.

Examples

The following example sets the tone source to remote:

pots tone-source remote

Related Commands

pre-dial delay

To configure a delay on an Foreign Exchange Office (FXO) interface between the beginning of the off-hook state and the initiation of dual-tone multifrequency (DTMF) signaling, use the pre-dial delay command in voice-port configuration mode. To reset to the default, use the no form of the command.

pre-dial delay seconds

no pre-dial delay

Syntax Description

Command Default

1 second

Command Modes

Voice-port configuration

Command History

Usage Guidelines

To disable the command, set the delay to 0. When an FXO interface begins to draw loop current (off-hook state), a delay is required between the initial flow of loop current and the beginning of signaling. Some devices initiate signaling too quickly, resulting in redial attempts. This command allows a signaling delay.

Examples

The following example sets a predial delay value of 3 seconds on the FXO port:

voice-port 1/0/0

 pre-dial delay 3

Related Commands

preference (dial peer)

To indicate the preferred order of a dial peer within a hunt group, use the preference command in dial peer configuration mode. To remove the preference, use the no form of this command.

preference value

no preference

Syntax Description

Command Default

0 (highest preference)

Command Modes

Dial peer configuration

Command History

Usage Guidelines

This command applies to POTS, VoIP, VoFR, and VoATM dial peers.

Use this command to indicate the preference order for matching dial peers in a rotary group. Setting the preference enables the desired dial peer to be selected when multiple dial peers within a hunt group are matched for a dial string.

Note If POTS and voice-network peers are mixed in the same hunt group, the POTS dial peers must have priority over the voice-network dial peers.

Use this command with the Rotary Calling Pattern feature described in the Cisco IOS Voice, Video, and Fax Configuration Guide, Release 12.2 chapter "Configuring H.323 Gateways."

The hunting algorithm precedence is configurable. For example, if you wish a call processing sequence to go to destination A first, to destination B second, and to destination C third, you would assign preference (0 being the highest priority) to the destinations in the following order:

•Preference 0 to A

•Preference 1 to B

•Preference 2 to C

Examples

The following example sets POTS dial peer 10 to a preference of 1, POTS dial peer 20 to a preference of 2, and VoFR dial peer 30 to a preference of 3:

dial-peer voice 10 pots

 destination pattern 5550150

 preference 1

 exit

dial-peer voice 20 pots

 destination pattern 5550150

 preference 2

 exit

dial-peer voice 30 vofr

 destination pattern 5550150

 preference 3

 exit

The following examples show different dial peer configurations:

Dialpeer        destpat         preference              session-target

1               4085550148      0 (highest)             jmmurphy-voip

2               408555          0                       sj-voip

3               408555          1 (lower)               backup-sj-voip

4               ..........      1                       0:D     (interface)

5               ..........      0                       anywhere-voip

If the destination number is 4085550148, the order of attempts is 1, 2, 3, 5, 4:

Dialpeer        destpat         preference

1               408555          0

2               4085550148      1

3               4085550         0

4 ..............4085550.........0

If the number dialed is 4085550148, the order is 2, 3, 4, 1.

Note The default behavior is that the longest matching dial peer supersedes the preference value.

Related Commands

preemption enable

To enable preemption capability on a trunk group, use the preemption enable command in trunk group configuration mode. To disable preemption capabilities, use the no form of this command.

preemption enable

no preemption enable

Syntax Description

This command has no arguments or keywords.

Command Default

Preemption is disabled on the trunk group.

Command Modes

Trunk group configuration

Command History

Examples

The following command example enables preemption capabilities on trunk group test:

Router(config)# trunk group test

Router(config-trunk-group)# preemption enable

Related Commands

preemption guard timer

To define the time for a DDR call and to allow time to clear the last call from the channel, use the preemption guard timer command in trunk group configuration mode. To disable the preemption guard time, use the no form of this command.

preemption guard timer value

no preemption guard timer

Syntax Description

Command Default

No preemption guard timer is configured.

Command Modes

Trunk group configuration

Command History

Examples

The following set of commands configures a 60-millisecond preemption guard timer on the trunk group dial2.

Router(config)# trunk group dial2

Router(config-trunk-group)# preemption enable

Router(config-trunk-group)# preemption guard timer 60

Related Commands

preemption level

To set the precedence for voice calls to be preempted by a dial-on demand routing (DDR) call for the trunk group, use the preemption level command in dial peer configuration mode. To restore the default preemption level setting, use the no form of this command

preemption level {flash-override | flash | immediate | priority | routine}

no preemption level

Syntax Description

Command Default

The preemption level default is routine (lowest).

Command Modes

Dial peer configuration

Command History

Examples

The following command example sets a preemption level of flash (level 1) on POTS dial-peer 20:

Router(config)# dial-peer voice 20 pots

Router(config-dial-peer)# preemption level flash

Related Commands

preemption tone timer

To set the expiry time for the preemption tone for the outgoing call being preempted by a DDR backup call, use the preemption tone timer command in trunk group configuration mode. To clear the expiry time, use the no form of this command.

preemption tone timer seconds

no preemption tone timer

Syntax Description

Command Default

No preemption tone timer is configured.

Command Modes

Trunk group configuration

Command History

Examples

The following set of commands configures a 20-second preemption tone timer on trunk group dial2.

Router(config)# trunk group dial2

Router(config-trunk-group)# preemption enable

Router(config-trunk-group)# preemption tone timer 20

Related Commands

prefix

To specify the prefix of the dialed digits for a dial peer, use the prefix command in dial peer configuration mode. To disable this feature, use the no form of this command.

prefix string

no prefix

Syntax Description

Command Default

Null string

Command Modes

Dial peer configuration

Command History

Usage Guidelines

Use this command to specify a prefix for a specific dial peer. When an outgoing call is initiated to this dial peer, the prefix string value is sent to the telephony interface first, before the telephone number associated with the dial peer.

If you want to configure different prefixes for dialed numbers on the same interface, you need to configure different dial peers.

This command is applicable only to plain old telephone service (POTS) dial peers. This command applies to off-ramp store-and-forward fax functions.

Examples

The following example specifies a prefix of 9 and then a pause:

dial-peer voice 10 pots

 prefix 9,

The following example specifies a prefix of 5120002:

Router(config-dial-peer)# prefix 5120002

Related Commands

prefix (Annex G)

To restrict the prefixes for which the gatekeeper should query the Annex G border element (BE), use the prefix command in gatekeeper border element configuration mode.

prefix prefix* [seq | blast]

Syntax Description

Command Default

Any time a remote zone query occurs, the BE is also queried.

Command Modes

Gatekeeper border element configuration

Command History

Usage Guidelines

By default, the gatekeeper sends all remote zone requests to the BE. Use this command only if you want to restrict the queries to the BE to a specific prefix or set of prefixes.

Examples

The following example directs the gatekeeper to query the BE using a prefix of 408.

Router(config-gk-annexg)# prefix 408* seq

Related Commands

prefix (stcapp-fac)

To designate a prefix string to precede the dialing of SCCP telephony control (STC) feature access codes, use the prefix command in STC application feature access-code configuration mode. To return the prefix to its default, use the no form of this command.

prefix prefix-string

no prefix

Syntax Description

Command Default

The default prefix is ** (two asterisks).

Command Modes

STC application feature access-code configuration

Command History

Usage Guidelines

This command is used with the STC application, which enables certain features on analog FXS endpoints that use Skinny Client Control Protocol (SCCP) for call control. Phone users dial the feature access code (FAC) prefix string before dialing a FAC that activates a feature. For example, to set call forwarding for all calls using the default prefix and FAC, a phone user dials **1.

Use this command only if you want to change the prefix from its default (**).

The show running-config command displays nondefault FACs and prefixes only. The show stcapp feature codes command displays all FACs and prefixes.

Examples

The following example sets a FAC prefix of two pound signs (##). After this value is configured, a phone user dials ##2 on the keypad to forward all calls for that extension.

Router(config)# stcapp feature access-code

Router(stcapp-fac)# prefix ##

Router(stcapp-fac)# call forward all 2

Router(stcapp-fac)# call forward cancel 3

Router(stcapp-fac)# pickup local 6

Router(stcapp-fac)# pickup group 5

Router(stcapp-fac)# pickup direct 4

Router(stcapp-fac)# exit

Related Commands

prefix (stcapp-fsd)

To designate a prefix string to precede the dialing of SCCP telephony control (STC) application feature speed-dial codes, use the prefix command in STC application feature speed-dial configuration mode. To return the prefix to its default, use the no form of this command.

prefix prefix-string

no prefix

Syntax Description

Command Default

The default prefix is * (one asterisk).

Command Modes

STC application feature speed-dial configuration

Command History

Usage Guidelines

This command is used with the STC application, which enables certain features on analog FXS endpoints that use Skinny Client Control Protocol (SCCP) for call control. Phone users dial the feature speed-dial (FSD) prefix string before dialing an FSD code that dials a telephone number. For example, to dial the telephone number that is stored in speed-dial position 2, a phone user dials *2.

Use this command only if you want to change the prefix from its default (*).

The show running-config command displays nondefault FSDs and prefixes only. The show stcapp feature codes command displays all feature speed-dial FSDs and prefixes.

Examples

The following example sets an FSD prefix of three asterisks (***). After this value is configured, a phone user presses ***2 on the keypad to dial speed-dial number 2.

Router(config)# stcapp feature speed-dial

Router(stcapp-fsd)# prefix ***

Router(stcapp-fsd)# speed dial from 2 to 7

Router(stcapp-fsd)# redial 9

Router(stcapp-fsd)# voicemail 8

Router(stcapp-fsd)# exit

Related Commands

preloaded-route

To enable preloaded route support for VoIP Session Initiation Protocol (SIP) calls, use the preloaded-route command in SIP configuration mode. To reset to the default, use the no form of this command.

preloaded-route [sip-server] service-route

no preloaded-route

Syntax Description

Command Default

Route support is not enabled.

Command Modes

SIP configuration (conf-serv-sip)

Command History

Usage Guidelines

The voice-class preloaded-route command, in dial-peer configuration mode, takes precedence over the preloaded-route command in SIP configuration mode. However, if the voice-class preloaded-route command is configured with the system keyword, the gateway uses the global settings configured by the preloaded-route command.

Enter SIP configuration mode after entering voice-service VoIP configuration mode, as shown in the "Examples" section.

Examples

The following example shows how to configure the system to include SIP server and Service-Route information in the Route header:

voice service voip

sip

 preloaded-route sip-server service-route

The following example shows how to configure the system to include only Service-Route information in the Route header:

voice service voip

sip

 preloaded-route service-route

Related Commands

presence

To enable presence service and enter presence configuration mode, use the presence command in global configuration mode. To disable presence service, use the no form of this command.

presence

no presence

Syntax Description

This command has no arguments or keywords.

Command Default

Presence service is disabled.

Command Modes

Global configuration (config)

Command History

Usage Guidelines

This command enables the router to perform the following presence functions:

•Process presence requests from internal lines to internal lines. Notify internal subscribers of any status change.

•Process incoming presence requests from a SIP trunk for internal lines. Notify external subscribers of any status change.

•Send presence requests to external presentities on behalf of internal lines. Relay status responses to internal lines.

Examples

The following example shows how to enable presence and enter presence configuration mode to set the maximum subscriptions to 150:

Router(config)# presence

Router(config-presence)# max-subscription 150

Related Commands

presence call-list

To enable Busy Lamp Field (BLF) monitoring for call lists and directories on phones registered to the Cisco Unified CME router, use the presence call-list command in ephone, presence, or voice register pool configuration mode. To disable BLF indicators for call lists, use the no form of this command.

presence call-list

no presence call-list

Syntax Description

This command has no arguments or keywords.

Command Default

BLF monitoring for call lists is disabled.

Command Modes

Ephone configuration (config-ephone)
Presence configuration (config-presence)
Voice register pool configuration (config-register pool)

Command History

Usage Guidelines

This command enables a phone to monitor the line status of directory numbers listed in a directory or call list, such as a missed calls, placed calls, or received calls list. Using this command in presence mode enables the BLF call-list feature for all phones. To enable the feature for an individual SCCP phone, use this command in ephone configuration mode. To enable the feature for an individual SIP phone, use this command in voice register pool configuration mode.

If this command is disabled globally and enabled in voice register pool or ephone configuration mode, the feature is enabled for that voice register pool or ephone.

If this command is enabled globally, the feature is enabled for all voice register pools and ephones regardless of whether it is enabled or disabled on a specific voice register pool or ephone.

To display a BLF status indicator, the directory number associated with a telephone number or extension must have presence enabled with the allow watch command.

For information on the BLF status indicators that display on specific types of phones, see the Cisco Unified IP Phone documentation for your phone model.

Examples

The following example shows the BLF call-list feature enabled for ephone 1. The line status of a directory number that appears in a call list or directory is displayed on phone 1 if the directory number has presence enabled.

Router(config)# ephone 1

Router(config-ephone)# presence call-list

Related Commands

presence enable

To allow incoming presence requests, use the presence enable command in SIP user-agent configuration mode. To block incoming requests, use the no form of this command.

presence enable

no presence enable

Syntax Description

This command has no arguments or keywords.

Command Default

Incoming presence requests are blocked.

Command Modes

SIP UA configuration (config-sip-ua)

Command History

Usage Guidelines

This command allows the router to accept incoming presence requests (SUBSCRIBE messages) from internal watchers and SIP trunks. It does not impact outgoing presence requests.

Examples

The following example shows how to allow incoming presence requests:

Router(config)# sip-ua

Router(config-sip-ua)# presence enable

Related Commands

pri-group (pri-slt)