Cisco VG350, Cisco VG310, and Cisco VG320 Voice Gateway Software Configuration and Administration Guide

Configuring Next-Generation High-Density PVDM3 Modules

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The next-generation Pack Voice Digital Signal Processor Modules (PVDM3) digital signal processor (DSP) modules provide up to four times the density (per slot) of existing audio applications on Cisco voice gateway routers. One universal DSP image for these DSP modules provides resources for time-division multiplexing-to-Internet Protocol (TDM-to-IP) gateway functionality for digital and analog interfaces, audio transcoding, and audio conferencing.

This enhanced DSP architecture accommodates a new packet-processing engine for rich-media voice applications and supports the TDM voice framework used by the PVDM3 module. The PVDM3 has a Gigabit Ethernet interface with a MultiGigabit Fabric to increase IP throughput, and a DSP hardware-based health monitor provides DSP failure detection that is ten times faster than existing technology.

The DSP Resource Manager has been enhanced so that PVDM3 modules can pool DSP resources and share DSP resources across voice service modules.

Warning You can configure Next-Generation High-Density PVDM3 Modules only on Cisco VG310 and Cisco VG320 platforms.

Contents

• Prerequisites for Configuring the PVDM3 Module on Cisco Voice Gateway Routers
• Restrictions for Configuring the PVDM3 Module on Cisco Voice Gateway Routers
• Information About Configuring the PVDM3 Module on Cisco Voice Gateway Routers
• How to Verify and Troubleshoot the Functionality of the PVDM3 Cards on Cisco Voice Gateways
• Configuration Examples for Configuring the PVDM3 Module on Cisco Voice Gateway Routers
• Additional References

Prerequisites for Configuring the PVDM3 Module on Cisco Voice Gateway Routers

To configure the PVDM3 Module on your Cisco VG310 or Cisco VG320 series voice gateway router, you must have Cisco IOS Release 15.4(3)M or a later release installed. The image must provide a voice-capable feature set.

If you have installed the PVDM3 cards in your Cisco gateway, make certain that you have complied with the hardware installation instructions in Cisco VG310 and Cisco VG320 Voice Gateways Hardware Installation Guide.

Restrictions for Configuring the PVDM3 Module on Cisco Voice Gateway Routers

The PVDM3 card can be installed and used on the Cisco VG310 or Cisco VG320 voice gateway routers.

All codecs that are supported on the PVDM2 are supported on the PVDM3, except that the PVDM3 does not support the G.723 (G.723.1 and G.723.1A) codecs. The PVDM2 can be used to provide G.723 codec support or the G.729 codec can be as an alternative on the PVDM3.

Information About Configuring the PVDM3 Module on Cisco Voice Gateway Routers

To take full advantage of the PVDM3 cards on Cisco voice gateway routers, you should understand the following concepts:

• DSP Resource Manager Enhancement and DSP Numbering
• DSP Image for the PVDM3
• Broadcast Fast Busy Tone for DSP Oversubscription
• Broadcast Fast Busy Tone for DSP Oversubscription

DSP Resource Manager Enhancement and DSP Numbering

Each PVDM3 DSP card can hold up to two devices, and each device can hold up to three DSP cores. The host recognizes each DSP card as one individual DSP and each physical DSP as a device. This virtual DSP concept provides a maximum of six DSPs per PVDM3. For backward compatibility for 5510 DSPs, the existing numbering scheme is maintained (see Table 4-1 ), and for PVDM3 DSPs, a new numbering scheme is applied (see Table 4-1 ).

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Note The numbering schemes shown in Table 4-1 are examples only, and the DSP cards must be installed in the PVDM slots as shown for these sample numbering schemes to be correct. For more information about DSP and device numbering, see the documents listed in the “Additional References” section.

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Table 4-1 Example of a DSP Numbering Scheme for PVDM3

PVDM3 Only	PVDM3-64
	PVDM3-128
DSP ID	1,2,3,4,5,6
Device ID	0,0,0,1,1,1

DSP Image for the PVDM3

The DSP image for the PVDM3 supports all features supported on PVDM2 except Cisco Fax Relay. The DSP image provides feature capability to implement the signal processing layer for a TDM-to-IP gateway:

• TDM-to-IP gateway for voice telephony, including support for multicast conferencing through the mixing of multiple IP streams out a single TDM port.
• Low-level processing of CAS from a T1/E1 interface through the use of digital signaling channels.
• Control and low-level processing of the signaling for analog telephony interface implemented on Cisco’s voice interface card (VIC) hardware.
• Support for Voice Band Data (VBD) through the use of upspeeding channels.
• Support of facsimile using T.38 Fax Relay technology.
• Support of high-speed modems (V.32 and V.34) using Modem Relay technology.
• Interface with Secure Telephony (STU) phones using Secure Telephony over IP standard technology.
• Support for interfacing VoIP channel to Land Mobile Radio (LMR) networks.
• Support for secure VoIP through the implementation of SRTP for both encryption and authentication of RTP packets.
• Support for text telephony (Baudot) using Text Relay technology.

The DSP image for the PVDM3 also provides a complete set of features to implement the signal processing layer of an IP-to-IP gateway and an IP-based conference server. Highlights of this functionality include:

• G.711 transcoding for implementing a LAN-WAN gateway.
• Universal Transcoding between any two voice codecs (narrowband or wideband).
• Trans-scripting services for conversion between SRTP configurations or between secured and unsecured networks.
• IP-based voice conferencing, including narrowband and wideband participants.

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Note Transcoding, LMR and Conferencing features are not supported on Cisco VG310 and Cisco VG320 Voice Gateways.

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DETAILED STEPS

 

	Command or Action	Purpose
Step 1	enable   Router> enable	Enable privileged EXEC mode Enter your password if prompted.
Step 2	configure terminal   Router# configure terminal	Enter global configuration mode.
Step 3	controller e1 slot/port   Router(config)# controller e1 0/2/0	Enter config-controller mode.
Step 4	shutdown   Router(config-controller)# shutdown	Administratively shuts down the controller port.
Step 5	exit   Router(config-controller)# exit	Exit config-controller mode.
Step 6	voice-port slot number/port   Router(config)# voice-port 0/0/0:1	Enter config-voiceport mode.
Step 7	shutdown   Router(config-voiceport)# shutdown	Administratively shuts down the voice port.
Step 8	exit   Router(config-voiceport)# exit	Exit config-voiceport mode. Use the exit command till you are in privileged EXEC mode.

Perform online insertion and removal

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Note This feature is available only on Cisco VG350.

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How to Verify and Troubleshoot the Functionality of the PVDM3 Cards on Cisco Voice Gateways

Use the following commands in global configuration mode to verify and troubleshoot the functionality of the PVDM3 modules in your Cisco voice gateway.

SUMMARY STEPS

1. show platform hw-module-power

1. show voice call slot / port

2. show voice dsp group all

3. show voice dsp sorted-list

4. show voice dsp capabilities slot number dsp number

5. show voice dsp group slot number

6. show voice dsp statistics device

7. show voice dsp statistics tx-rx

8. show voice dsp statistics ack

9. debug voice dsp crash-dump

DETAILED STEPS

Step 1 show platform hw-module-power

Note Only on Cisco VG350, effective from Cisco IOS Releases 15.1(1)T and 15.0.1M(2), the hw-module energywise level command is not available in Cisco IOS software. For more information, see the Cisco 3900 Series, 2900 Series, and 1900 Series Software Configuration Guide.

Use this command to display power settings of PVDM3 service modules, for example:

Step 2 show voice call slot / port

Note If you are connected using a Telnet session, you must enter the terminal monitor command before the show voice call command to see console messages. This step is not necessary if you are connected to the console port.

Use this command to display statistics for voice calls on a specific slot and port, for example:

Step 3 show voice dsp group all

Use this command to display information for each DSP group, for example:

Step 4 show voice dsp sorted-list

Use this command to display the hunt order in which DSPs are utilized for particular services (in this example, voice, conferencing, and transcoding are shown for slot 0):

Step 5 show voice dsp capabilities slot number dsp number

Use this command to display capabilities data for a particular DSP on a particular slot (in this example, DSP 2 on slot 0):

Step 6 show voice dsp group slot number

Use this command to display the current status or selective statistics of DSP voice channels for a specific DSP group. For example:

Step 7 show voice dsp statistics device

Use this command to display DSP voice statistics for the device:

Step 8 show voice dsp statistics tx-rx

Use this command to display transmitted and received packet counts for the device:

Step 9 show voice dsp statistics ack

Use this command to display ACK statistics for the device:

Step 10 debug voice dsp crash-dump

Use this command to display debugging information for the crash dump feature (for detailed information about this, see the section Voice DSP Crash Dump File Analysis in Cisco IOS Voice Troubleshooting and Monitoring Guide):

Configuration Examples for Configuring the PVDM3 Module on Cisco Voice Gateway Routers

This section provides an example of a running configuration. This example is for reference purposes only and contains IP addresses and telephone numbers that are not actual, valid addresses and telephone numbers; they are provided for illustrative purposes only.

Additional References

The following sections provide references related to the PVDM3 on Cisco Gateway Routers feature.

Feature Information for Configuring the PVDM3 Module on Cisco Voice Gateway Routers

Table 4-2 lists the release history for this feature.

Not all commands may be available in your Cisco IOS software release. For release information about a specific command, see the command reference documentation.

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 at Cisco.com is not required.

Note Table 4-2 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.