Cisco Cisco NM-1V One Voice Fax Interface Card Slot Network Module Hoja De Datos
Data Sheet
© 2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
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Cisco Enhanced Conferencing and Transcoding for Voice
Gateway Routers
Gateway Routers
Cisco
®
Enhanced Conferencing and Transcoding for Voice Gateway Routers provides conferencing and
transcoding capabilities in Cisco IOS
®
Software-based gateways using the onboard Cisco Packet
Voice/Fax Digital Signal Processor Modules (PVDM2 / PVDM3) on the Cisco 2800, 3800, 2900 and 3900
series voice gateway routers. This capability is also supported on Cisco voice gateway router platforms
using the Cisco IP Communications Voice/Fax Network Module and the Cisco IP Communications High-
Density Digital Voice/Fax Network Module. This feature is delivered in Cisco IOS Software and operates in
conjunction with Cisco Unified Communications Manager (CUCM) or Cisco Unified Communications
Manager Express (CUCME) or Cisco Unified Border Element (CUBE).
The Cisco Enhanced Conferencing and Transcoding for Voice Gateway Routers feature provides enhanced
multiservice support for Cisco routers in a Cisco Unified Communication Network. This is accomplished by enabling
audioconferencing and transcoding functions in access routers. This single-package solution simplifies deployment,
eases administration, and helps deliver tangible cost savings by locating conference resources in the branch to
reduce WAN utilization. This feature further minimizes costs by using transcoding services to reduce bandwidth
needs.
An integral part of Cisco Unified Communications solutions, Cisco Systems
®
IP telephony offers feature-rich
telephony services on a fully converged IP network. Using Cisco 2800,3800, 2900 and 3900 series onboard digital
signal processor (DSP) capability and also available on the Cisco IP Communications Voice/Fax Network Module
(NM-HD) and the Cisco IP Communications High-Density Digital Voice/Fax Network Module (NM-HDV2), the Cisco
Enhanced Conferencing and Transcoding for Voice Gateway Routers feature preserves all the WAN, public switched
telephone network (PSTN), and private branch exchange (PBX) access capabilities while adding rich-media
conferencing and transcoding functions.
Audio Conferencing Services
In a traditional circuit-switched voice network, all voice traffic goes through a central device (such as a PBX system),
which provides audioconferencing services as well. Because IP phones transmit voice traffic directly between
phones, a network-based conference bridge is required to facilitate multiparty conferences. In an IP telephony
network using CUCM or CUCME, the Cisco Enhanced Conferencing and Transcoding for Voice Gateway Routers
feature provides the conference bridging service. This feature also supports these services:
●
Cisco CUCM and CUCME Meet-Me and ad-hoc conferences with up to 64 participants
●
Substantial scalability in the number of conferences supported based on the number of Cisco Packet Voice
DSP Fax/Voice Modules (PVDM2s or PVDM3s) employed
●
G.711 a/u-law, G.729, G.729a, G.729b, G.729ab, G.722, iLBC participants joined in a single conference
●
Easy deployment of conference resources in routers across the network; this provides a local conference
resource, reduces WAN utilization, and improves voice network performance