Introduction

The Cisco Fourth-Generation T1/E1 Multiflex Trunk Voice and WAN Network Interface Modules (NIMs) support data and voice applications on the Cisco 4451-X integrated services routers. These cards combine WAN-interface-card (WIC),voice-interface-card (VIC),ISDN Primary Rate Interface (PRI),dial-access integration,and channelized-data (CE1T1) functions to provide unparalleled flexibility,versatility,and investment protection through their many uses. Customers who choose to integrate data and voice in multiple steps preserve their investment in a T1/E1 WAN interface.

The T1/E1 modules contain an onboard Cisco Packet Voice Digital Signal Processor Module 4 (PVDM4) slot,which requires a fourth-generation PVDM4 module. A PVDM4 on the T1/E1 module is necessary for the voice features. The PVDM4 also provides for echo cancellation of up to 128-ms echo-tail length for demanding network conditions.

Specifications

General
Device Type	Expansion module
Form Factor	Plug-in module
Networking
Ports	T1/E1 x 2
Connectivity Technology	Wired
Data Transfer Rate	2.048 Mbps
Remote Management Protocol	SNMP,Telnet
Line Rate	T-1/E-1
Line Coding Format	AMI,B8ZS,HDB3
Status Indicators	Carrier detect,alarm
Features	Integrated CSU/DSU
Expansion / Connectivity
Interfaces	2 x T1/E1
Dimensions & Weight
Width	8.89 cm
Depth	18.39 cm
Height	3.18 cm
Weight	191 g