T.38 Fax Support on Cisco UBE for IPv6

Last Updated: December 4, 2012

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Information About T.38 Fax Support on Cisco UBE for IPv6

Cisco Unified Border Element in VoIPv6

The Cisco Unified Border Element (UBE) feature adds IPv6 capability to existing VoIP features. This feature adds dual-stack support on voice gateways and MTP, IPv6 support for SIP trunks, and support for SCCP-controlled analog voice gateways. Real-time control protocol (RTCP) pass-through and T.38 fax over IPv6 have also been added to Cisco UBE.

How to Configure T.38 Fax Support on Cisco UBE for IPv6

Configuring IPv6 Support for Cisco UBE

Perform this task to configure IPv6 support for Cisco UBE.


Note

In Cisco UBE, IPv4-only and IPv6-only modes are not supported when endpoints are dual-stack. In this case, Cisco UBE must also be configured in dual-stack mode.

>
SUMMARY STEPS

1.    enable

2.    configure terminal

3.    sip-ua

4.    protocol mode {ipv4 | ipv6 | dual-stack preference {ipv4 | ipv6}}

5.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Router> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Router# configure terminal

 

Enters global configuration mode.

 
Step 3
sip-ua


Example:

Router(config)# sip-ua

 

Enters SIP user-agent configuration mode.

 
Step 4
protocol mode {ipv4 | ipv6 | dual-stack preference {ipv4 | ipv6}}


Example:

Router(config-sip-ua)# protocol mode ipv6

 

Configures the Cisco IOS SIP stack.

  • protocol mode dual-stack preference {ipv4 | ipv6}--Sets the IP preference when the anat command is configured.
  • protocol mode {ipv4 | ipv6}--Passes the IPv4 or IPv6 address in the SIP invite.
  • protocol mode dual-stack --Passes both the IPv4 addresses and the IPv6 addresses in the SIP invite and sets priority based on the far-end IP address.
 
Step 5
end


Example:

Router(config-sip-ua)# end

 

Exits SIP user-agent configuration mode.

 

Configuring T.38 Fax Globally

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    voice service voip

4.    no ip address trusted authenticate

5.    allow-connections {h323 | sip} to {h323 | sip}

6.    fax protocol t38 [nse [force]] [version {0 | 3}] [ls-redundancy value [hs-redundancy value]] [fallback {cisco | none | pass-through {g711ulaw | g711alaw}}]

7.    sip

8.    bind control source-interface type number

9.    bind media source-interface type number

10.    no anat

11.    end


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Router> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Router# configure terminal

 

Enters global configuration mode.

 
Step 3
voice service voip


Example:

Router(config)# voice service voip

 

Enters voice service configuration mode.

 
Step 4
no ip address trusted authenticate


Example:

Router(conf-voi-serv)# no ip address trusted authenticate

 

Disables the IP address trusted authentication feature for incoming H.323 or SIP trunk calls for toll-fraud prevention.

 
Step 5
allow-connections {h323 | sip} to {h323 | sip}


Example:

Router(conf-voi-serv)# allow-connections sip to sip

 

Allows connections between specific types of endpoints in a VoIP network.

 
Step 6
fax protocol t38 [nse [force]] [version {0 | 3}] [ls-redundancy value [hs-redundancy value]] [fallback {cisco | none | pass-through {g711ulaw | g711alaw}}]


Example:

Router(conf-voi-serv)# fax protocol t38 version 0 ls-redundancy 0 hs-redundancy 0 fallback cisco

 

Specifies the global default ITU-T T.38 standard fax protocol to be used for all VoIP dial peers.

 
Step 7
sip


Example:

Router(conf-voi-serv)# sip

 

Enters SIP configuration mode.

 
Step 8
bind control source-interface type number


Example:

Router(conf-serv-sip)# bind control source-interface GigabitEthernet 0/0

 

Binds Session Initiation Protocol (SIP) signaling packets and specifies an interface as the source address of SIP packets.

 
Step 9
bind media source-interface type number


Example:

Router(conf-serv-sip)# bind media source-interface GigabitEthernet 0/0

 

Binds only media packets to the IPv4 or IPv6 address of a specific interface and specifies an interface as the source address of SIP packets.

 
Step 10
no anat


Example:

Router(conf-serv-sip)# no anat

 

Enables Alternative Network Address Types (ANAT) on a SIP trunk.

 
Step 11
end


Example:

Router(conf-serv-sip)# end

 

Exits SIP configuration mode and returns to the privileged EXEC mode.

 

Configuration Examples for T.38 Fax Support on Cisco UBE for IPv6

Example: Verifying T.38 Fax Configuration

Router# debug ccsip all
Received:
INVITE sip:5555555555@[2001:DB8:1:1:1:1:1:1118]:5060 SIP/2.0
Via: SIP/2.0/UDP [2001:DB8:1:1:1:1:1:1115]:5060;branch=z9hG4bK83AE3
Remote-Party-ID: <sip:2222222222@[2001:DB8:1:1:1:1:1:1115]>;party=calling;screen=no;privacy=off
From: <sip:2222222222@[2001:DB8:1:1:1:1:1:1115]>;tag=627460F0-1259
To: <sip:5555555555@[2001:DB8:1:1:1:1:1:1118]>
Date: Tue, 01 Mar 2011 08:49:48 GMT
Call-ID: B30FCDEB-431711E0-8EDECB51-E9F6B1F1@2001:DB8:1:1:1:1:1:1115
Supported: 100rel,timer,resource-priority,replaces
Require: sdp-anat
Min-SE:  1800
Cisco-Guid: 2948477781-1125585376-2396638033-3925258737
User-Agent: Cisco-SIPGateway/IOS-15.1(3.14.2)PIA16
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY, INFO, REGISTER
CSeq: 101 INVITE
Max-Forwards: 70
Timestamp: 1298969388
Contact: <sip:2222222222@[22001:DB8:1:1:1:1:1:1115]:5060>
Expires: 180
Allow-Events: telephone-event
Content-Type: application/sdp
Content-Disposition: session;handling=required
Content-Length: 495
v=0
o=CiscoSystemsSIP-GW-UserAgent 7880 7375 IN IP6 2001:DB8:1:1:1:1:1:1115
s=SIP Call
c=IN IP6 2001:DB8:1:1:1:1:1:1115
t=0 0
a=group:ANAT 1 2
m=audio 17836 RTP/AVP 0 101 19
c=IN IP6 2001:DB8:1:1:1:1:1:1115
a=mid:1                                                
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=rtpmap:19 CN/8000
a=ptime:20
m=audio 18938 RTP/AVP 0 101 19
c=IN IP4 9.45.36.111
a=mid:2                                                
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=rtpmap:19 CN/8000
a=ptime:20
"Received: 
INVITE sip:2222222222@[2001:DB8:1:1:1:1:1:1117]:5060 SIP/2.0
Via: SIP/2.0/UDP [2001:DB8:1:1:1:1:1:1116]:5060;branch=z9hG4bK38ACE
Remote-Party-ID: <sip:5555555555@[2001:DB8:1:1:1:1:1:1116]>;party=calling;screen=no;privacy=off
From: <sip:5555555555@[2001:DB8:1:1:1:1:1:1116]>;tag=4FE8C9C-1630
To: <sip:2222222222@[2001:DB8:1:1:1:1:1:1117]>;tag=1001045C-992
Date: Thu, 10 Feb 2011 12:15:08 GMT
Call-ID: 5DEDB77E-ADC11208-808BE770-8FCACF34@2001:DB8:1:1:1:1:1:1117
Supported: 100rel,timer,resource-priority,replaces,sdp-anat
Min-SE:  1800
Cisco-Guid: 1432849350-0876876256-2424621905-3925258737
User-Agent: Cisco-SIPGateway/IOS-15.1(3.14.2)PIA16
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY, INFO, REGISTER
CSeq: 101 INVITE
Max-Forwards: 70
Timestamp: 1297340108
Contact: <sip:5555555555@[2001:DB8:1:1:1:1:1:1116]:5060>
Expires: 180
Allow-Events: telephone-event
Content-Type: application/sdp
Content-Length: 424
v=0
o=CiscoSystemsSIP-GW-UserAgent 8002 7261 IN IP6 2001:DB8:1:1:1:1:1:1116
s=SIP Call
c=IN IP6 2001:DB8:1:1:1:1:1:1116
t=0 0
m=image 17278 udptl t38
c=IN IP6 2001:DB8:1:1:1:1:1:1116
a=T38FaxVersion:0
a=T38MaxBitRate:14400
a=T38FaxFillBitRemoval:0
a=T38FaxTranscodingMMR:0
a=T38FaxTranscodingJBIG:0
a=T38FaxRateManagement:transferredTCF
a=T38FaxMaxBuffer:200
a=T38FaxMaxDatagram:320
a=T38FaxUdpEC:t38UDPRedundancy"

Additional References

Related Documents

Related Topic Document Title

IPv6 addressing and connectivity

IPv6 Configuration Guide

Cisco IOS commands

Cisco IOS Master Command List, All Releases

Cisco IOS IPv6 commands

Cisco IOS IPv6 Command Reference

Cisco IOS IPv6 features

Cisco IOS IPv6 Feature Mapping

Standards and RFCs

Standard/RFC Title

RFCs for IPv6

IPv6 RFCs

Technical Assistance

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Feature Information for T.38 Fax Support on Cisco UBE for IPv6

The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.

Table 1 Feature Information for T.38 Fax Support on Cisco UBE for IPv6
Feature Name Releases Feature Information

T.38 Fax Support on Cisco UBE for IPv6

15.2(1)T

IPv6 supports this feature.

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Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.

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