- Supplementary Services Feature Roadmap
- Overview of Supplementary Services for FXS Ports on Cisco IOS Voice Gateways
- Configuring FXS Ports for Basic Calls
- Enabling Fallback to Cisco Unified SRST for Call Control on Analog (FXS) Ports
- Configuring Supplementary Features
- Configuring Feature Mode
- Configuring CallBack on Busy for Analog Phones
- Configuring CallBack on No Answer
- Configuring Call Waiting Tone Cadence
- Configuring AMWI and VMWI
- Configuring DC Voltage Based VMWI for SCCP Controlled Analog Ports
- Configuring Call Hold/Resume for Shared Lines for Analog Ports
- Configuring cBarge and Privacy for Shared Lines
- Configuring Single Number Reach for Analog Phones
- Media Renegotiation
- Configuring DTMF Relay, Fax Relay and Modem Relay
- Configuring Secure Signaling and Media Encryption for the Cisco VG224
- Configuring Secure SCCP Analog Endpoints over TLS with CM
- Implementing Enhanced Serviceability
- Contents
- Information About DC Voltage Based VMWI for SCCP Controlled Analog Ports
- How to Configure DC Voltage Based VMWI for SCCP Controlled Analog Ports
- Configuration Examples for DC Voltage Based VMWI for SCCP Controlled Analog Ports
- Additional References
- Feature Information for DC Voltage Based VMWI for SCCP Controlled Analog Ports
Configuring DC Voltage Based VMWI for SCCP Controlled Analog Ports
First Published: August 1, 2008
This module describes the DC Voltage Based VMWI for SCCP Controlled Analog Ports feature. This feature is supported for analog endpoints that are connected to Foreign Exchange Station (FXS) ports on a Cisco VG224 Analog Phone Gateway with analog device version V1.2 or V3.1 and controlled by a Cisco call-control system such as Cisco Unified Communications Manager or Cisco Unified Communications Manager Express (Cisco Unified CME).
Finding Feature Information in This Module
Your Cisco IOS software release may not support all of the features documented in this module. To reach links to specific feature documentation in this module and to see a list of the releases in which each feature is supported, use the “Feature Information for DC Voltage Based VMWI for SCCP Controlled Analog Ports” section.
Finding Support Information for Platforms and Cisco IOS Software Images
Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Contents
Information About DC Voltage Based VMWI for SCCP Controlled Analog Ports
To enable SCCP supplementary features on analog phones connected to FXS ports on a Cisco voice gateway, you should understand the following concepts:
Feature Summary
Table 1 contains information about the DC Voltage Based VMWI for SCCP Controlled Analog Ports feature, along with information about how to configure support for this feature in your Cisco call-control system.
VMWI for SCCP FXS Ports in Cisco IOS Software
This feature provides visual message waiting indication (VMWI) capability on analog FXS ports connected to Cisco voice gateways.
The VMWI on SCCP controlled analog phones feature works with the voice-mail system to send message waiting notification to the user. The SCCP gateway provides VMWI light activation using frequency shift keying (FSK) messaging that is supported on the analog phone with a 24- to 48-volt lamp. If the phone is on hook, the VMWI lamp light turns on when a new message is received. The light turns off after the user has reviewed all messages. If the phone is off hook, the VMWI light is turned on or off the next time the phone goes on hook.
The VMWI feature for analog phones also supports shared-line VMWI in Cisco Unified Communications Manager 4.2 and later versions and Cisco Unified CME 4.0 and later versions. The VMWI LED is turned on or off only when all phones are on hook. Overlay VMWI is supported in Cisco Unified CME, with the VMWI signaled on the first ephone-dn (directory number).
No configuration is required on the SCCP analog gateway to enable this feature.
DC Voltage VMWI
The DC Voltage VMWI feature is used to flash the message-waiting lamp on an analog phone which requires DC voltage instead of an FSK message. DC voltage VMWI is supported for the SCCP telephony control (STC) application only. For all other applications, such as MGCP, FSK VMWI will be used even if the voice gateway is configured for DC voltage VMWI. The configuration for DC voltage VMWI is supported only for FXS ports on the Cisco VG224 analog voice gateway with analog device version V1.3 and V2.1.
The Cisco VG224 can only support 12 REN for ringing 24 onboard analog FXS voice ports. In order to support ringing and DC Voltage VMWI for 24 analog voice ports, stagger-ringing logic is used to maximize the limited REN resource. When a system runs out of REN because too many voice ports are being rung, the MWI lamp temporarily turns off to free up REN to ring the voice ports.
DC voltage VMWI is also temporarily turned off any time the port’s operational state is no longer idle and onhook, such as when one of the following events occur:
Once the operational state of the port changes to idle and onhook again, the MWI lamp resumes flashing until the application receives a requests to clear it; for example, if there are no more waiting messages.
For configuration information, see the “How to Configure DC Voltage Based VMWI for SCCP Controlled Analog Ports” section.
How to Configure DC Voltage Based VMWI for SCCP Controlled Analog Ports
Note
This document does not contain details about configuring Cisco Unified Communications Manager or Cisco Unified CME. See the documentation for these products for installation and configuration instructions.
To enable DC voltage VMWI on a Cisco VG224 onboard analog FXS voice port, perform the following steps.
Prerequisites for DC Voltage Based VMWI for SCCP Controlled Analog Ports
- Cisco IOS Release 12.4(20)YA or a later version.
- Cisco VG224 Analog Phone Gateway with analog device version V1.3 or V2.1.
- The Cisco voice gateway must be set up and configured for operation. For information, see the appropriate Cisco configuration documentation.
- SCCP and the SCCP telephony control (STC) application are enabled on the Cisco voice gateway. For configuration information, see the “Configuring FXS Ports for Basic Calls” section.
- SCCP supplementary features are enabled on the Cisco voice gateway. See the “Configuring Supplementary Features” section.
Restrictions for DC Voltage Based VMWI for SCCP Controlled Analog Ports
- DC voltage VMWI configuration is supported for the SCCP telephony control (STC) application only. For all other applications, such as MGCP, FSK VMWI is used regardless of the DC voltage VMWI configuration.
- DC voltage VMWI is supported only on Cisco VG224 onboard analog FXS ports with loop start signaling type. This feature is not supported on analog FXS ports with ground start.
- DC voltage VMWI is not supported on analog FXS ports on a Cisco integrated service router (ISR) or on a Cisco Unified 500 series platform.
- DC voltage VMWI is not supported on analog phones with neon bulbs.
- DC voltage VMWI is not supported on analog phones that support FSK VMWI.
SUMMARY STEPS
DETAILED STEPS
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Exits voice-port configuration mode and returns to privileged EXEC mode. |
Configuration Examples for DC Voltage Based VMWI for SCCP Controlled Analog Ports
This section contains the following example:
Example: VMWI for SCCP FXS Ports in Cisco IOS Features
The following example shows VMWI activated on Cisco VG224 port 2/4:
Additional References
The following sections provide references related to SCCP analog phone support for FXS ports on the Cisco voice gateway.
Related Documents
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Technical Assistance
Feature Information for DC Voltage Based VMWI for SCCP Controlled Analog Ports
Table 2 lists the features in this module and provides links to specific configuration information. Only features that were introduced or modified in Cisco IOS Release 12.4(20)YA or a later release appear in the table.
For information on a feature in this technology that is not documented here, see the “Supplementary Services Features Roadmap” section.
Not all commands may be available in your Cisco IOS software release. For release information about a command, see the command reference documentation. For information about these commands, see the Cisco IOS Voice Command Reference at http://www.cisco.com/en/US/docs/ios/voice/command/reference/vr_book.html. For information about all Cisco IOS commands, use the Command Lookup Tool at http://tools.cisco.com/Support/CLILookup or the Cisco IOS Master Command List, All Releases at http://www.cisco.com/en/US/docs/ios/mcl/allreleasemcl/all_book.html.
Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which Cisco IOS and Catalyst OS software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Note Table 2 lists only the Cisco IOS software release that introduced support for a given feature in a given Cisco IOS software release train. Unless noted otherwise, subsequent releases of that Cisco IOS software release train also support that feature.
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