Cisco Cisco NM-1V One Voice Fax Interface Card Slot Network Module 数据表

Data Sheet

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Cisco Enhanced Conferencing and Transcoding for Voice
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