User guide

3-3
Cisco Media Gateway Manager 5.0 User Guide
OL-5461-02
Chapter 3 Planning the Network
What Network Elements Are Available to a Network Planner?
The Cisco PXM-45 provides the following features:
• 45-Gbps nonblocking switching
• Hot card insertion/removal
• 1:1 hot-standby redundancy
• User-selectable primary and secondary clock sources with graceful switchover
• Internal Stratum-3, external building integrated timing supply (BITS), or inband clock sources
• Inband or out-of-band management via EIA/TIA-232 or 10BaseT control ports
• Support for narrowband and broadband service modules scaling from DS0 to OC-48c/STM-16
3.2.4 Cisco Voice Switch Service Module
The Cisco Voice Switch Service Module (VXSM) is a high-density voice module that enables
compatibility with the Cisco MGX 8880 Media Gateway and the Cisco MGX 8850 Multiservice Switch.
The Cisco VXSM provides high availability, scalable, and robust voice features for wireless, wireline,
and cable applications.
The Cisco VXSM has time-division multiplexing (TDM) interfaces ranging from T1/E1 to channelized
OC-3/STM-1. It provides service providers with carrier-class capabilities for high capacity and
reliability for Voice over IP (VoIP) services. The Cisco VXSM supports up to 8064 DS-0s and can
protect active voice calls if scheduled or unscheduled outages occur.
The Cisco VXSM architecture combines a high-performance voice services engine with onboard digital
signal processors (DSPs) to provide advanced voice processing and features that allow quick
development and deployment of VoIP services. The Cisco VXSM offers carrier-grade voice quality with
voice, modem, and fax features. Together with a softswitch, it provides deployment flexibility for
various packet voice networks based on the MGCP, PacketCable Trunking Gateway Control Protocol
(TGCP), H.248, H.323, and the session initiation protocol (SIP). Cisco VXSM architecture allows new
functions and services to be easily added through software upgrades.
• The VXSM provides the following high density features:
– Scales up to 8064 VoIP DS-0s per service module
– Reduces costs by maximizing density per platform
– Allows 40,320 VoIP DS-0s per chassis and 120,960 VoIP DS-0s per rack, with echo cancellation
• TDM interfaces provide:
– Scalable optical interfaces; available with 2- or 4-port OC-3/STM-1 interfaces per service
module
– Scalable electrical interfaces; up to 48 T1/E1 interfaces per service module
• VXSM high availability—Ensures carrier-class reliability by providing active call preservation
• VXSM integrated nonblocking architecture—Lowers costs by integrating TDM, network
processing, and DSP technology onto a single module