Cisco 2-port RJ-48 multiflex voice/WAN trunk (T1/E1) Specification Guide

© 2005 Cisco Systems, Inc. All rights reserved.

The second-generation 1- and 2-port T1/E1 multiflex trunk (MFT) voice/WAN interface cards (multiflex
VWICs) support data and voice applications in Cisco multiservice routers. The multiflex VWIC
combines WAN interface card (WIC) and voice interface card (VIC) functionality to provide the
following improvements:

Support for both T1 and E1—T1/E1 MFT VWIC2 cards provide additional flexibility in configuring
the MFT VWIC2 cards by supporting T1, fractional T1, E1, and fractional E1 for both voice and
WAN applications.

Drop and insert capability on all versions—All MFT VWIC2 modules now include the drop and
insert multiplexing capability, which eliminates external third party CSU/DSUs and drop and insert
multiplexers.

Enhanced clocking capabilities—The 2-port MFT VWIC2s can enable each port to be clocked from
independent clock sources for data applications. This independent clocking capability is not
supported for voice applications and not supported with the AIM-ATM-VOICE-30 module.

Dedicated echo cancellation option—MFT VWIC2s have an onboard slot for a multiflex trunk
dedicated echo cancellation module (EC-MFT-32 and EC-MFT-64), offering an enhanced echo
cancellation capability for demanding network conditions. For more information about this feature,
refer to the “Hardware Echo Cancellation” chapter in the

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12.3(14)T

This feature was introduced on the following platforms: Cisco 2600XM
series, Cisco 2691, Cisco 2800 series, Cisco 3662 (telco models),
Cisco 3700 series, and Cisco 3800 series.