IP Telephony/Voice over IP (VoIP)

Document ID: 8015

Contents

Introduction
Prerequisites
      Requirements
      Components Used
      Conventions
Product Numbers
Features
Platform Support
NetPro Discussion Forums - Featured Conversations
Related Information

Introduction

The IP Communications High Density Voice Network Modules combine WAN Interface Card (WIC) and Voice Interface Card (VIC) functionality to provide unparalleled flexibility and power. The High Density Voice Network Module can support up to 60 simultaneous mid-complexity voice compression codecs or algorithms.

The IP Communications High Density Digital Voice/Fax Network Modules deliver these functions:

• high density digital voice connectivity

• high density WAN connectivity

• analog voice connectivity

• capability to conference and transcode in a network module form factor

The network modules provide enterprises, managed service providers, and service providers with the ability to directly connect devices to Cisco® 2600XM, Cisco 2691, 2811, 2821, 2851, Cisco 3700 Series and Cisco 3800 Series Access Routers for either IP Communications capabilities or pure toll bypass. These are the devices:

• public switched telephone network (PSTN)

• traditional telephony equipment, such as private branch exchange (PBX), key systems, analog telephones, and fax machines

• WAN

The IP Communications High Density Digital Voice/Fax Network Modules flexibly operates within these two different Cisco Architecture for Voice, Video and Integrated Data (AVVID) IP Telephony environments:

• Cisco CallManager system with Survivable Remote Site Telephony (SRST)

• Cisco CallManager Express

The network modules can be integrated with these IP Telephony solutions in a Multiservice Access Router in order to provide a complete IP Communications solution for full service branch customers.

Prerequisites

Requirements

Cisco recommends that you have knowledge of basic Voice over IP (VoIP) concepts and configuration.

Components Used

This document is not restricted to specific software and hardware versions.

Conventions

Refer to Cisco Technical Tips Conventions for more information on document conventions.

Product Numbers

This table lists the High Density Voice Network Module and the product number that corresponds:

Features

The features of High Density Voice Network Modules are explained in this section.

• Supports 1 or 2 T1 or E1 interfaces.

• Uses VWICs to supply physical interface (1 and 2 Port T1 Multi-Flex Trunk VWIC) (1 and 2 Port E1 Multi-Flex Trunk VWIC).

• Each PVDM-12 contains 3 TI 549 DSPs.

  • Runs up to twelve voice calls using a medium complexity CODEC (G.711, G.729a/b, G.726, fax).

  • Runs up to six voice calls using a high complexity CODEC (G.729, G.728, G.723.1).

  • PVDM-12 fits into SIMM sockets on the NM-1HDV network module

  • Five PVDM SIMM sockets on the NM-1HDV network module

DSP IDs on the NM-HDV PVDM-12—When you configure the ds0-group or pri-group, the timeslots are assigned DSP channels dynamically. The IDs of the DSPs are:

• The DSPs on the PVDM-12 on SIMM socket 4 have an id=0,1,2

• The DSPs on the PVDM-12 on SIMM socket 3 have an id=3,4,5

• The DSPs on the PVDM-12 on SIMM socket 2 have an id=6,7,8

• The DSPs on the PVDM-12 on SIMM socket 1 have an id=9,10,11

• The DSPs on the PVDM-12 on SIMM socket 0 have an id=12,13,14

Issue the show voice dsp command to view DSP ID information.

Platform Support

This table outlines the platform support:

¹ Requires a Cisco IOS Plus feature set.

Note: The Cisco IOS versions provided are typically the minimum version required to support the platform, module or feature in question. Use the Software Advisor Tool ( registered customers only) for a complete list of Cisco IOS software versions in which a particular feature, module, interface card, or chassis is supported.

NetPro Discussion Forums - Featured Conversations

Related Information

• Voice Hardware Compatibility Matrix for Cisco 1750, 2600, 3600 and VG200 Routers and Catalyst 4000, 5000 and 6000 Switches
• Cisco Network Modules Hardware Installation Guide
• Cisco High Density Voice/Fax Network Modules Troubleshooting TechNotes
• Cisco One and Two Port T1/E1 Multiflex Voice/WAN Interface Card
• IP Communications Voice/Fax Network Module Datasheet
• Voice, Telephony and Messaging Technologies
• IP Communications High-Density Digital Voice/Fax Network Module
• Voice and Unified Communications Support Resources
• Technical Support & Documentation - Cisco Systems