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Data Sheet

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Cisco Third-Generation 1-, 2-, and 4-Port T1/E1 Multiflex Trunk

Voice/WAN Interface Cards

These flexible interface cards support multiple integrated data, voice and video applications, facilitating the

migration from data only as well as circuit-switched voice/video services to a packet voice/video solution

Introduction

The Cisco® Third-generation 1-, 2-port and 4-port T1/E1 Multiflex Trunk Voice/WAN Interface (MFT VWIC3s) support

data and voice applications on the Cisco 1921, 1941 and 1941W (data only), and the Cisco 2901, 2911, 2921, 2951,

3925, 3945, 3925E and 3945E Integrated Services Routers. The Cisco MFT VWIC3 combines WAN-interface-card

(WIC) and voice-interface-card (VIC) functions to provide unparalleled flexibility, versatility, and investment

protection through its many uses. Customers who choose to integrate data and voice in multiple steps preserve their

investment in a T1/E1 WAN interface because the Cisco MFT VWIC3 cards can be reused in packet voice

applications. The 2 port T1/E1 MFT VWIC3 is shown below.

Figure 1. Cisco 1-,2- and 4-Port T1/E1 MFT VWIC3

The Cisco MFT VWIC3 interface cards add improvements over the Cisco Second-generation 1- and 2-port T1/E1

Multiflex Voice/WAN Interface Cards (MFT VWIC2s). The Cisco 2- and 4-port MFT VWIC3s enable each port to be

clocked from an independent clock source for data applications. Voice applications can now be clocked

independently from data applications, with all ports for voice applications clocked from a single source. The Cisco

MFT VWIC3s use the ECAN on the motherboard PVDM cards with up to 128ms echo-tail length for demanding

network conditions. MFT VWIC3 cards support up to 2 channel groups per T1/E1 port for serial data applications.

Refer to Table 3 for all configuration options offered with the MFT VWIC3 cards.

The Cisco MFT VWIC3 cards can be inserted into the EHWIC slot on the supported Cisco 1921, 1941, 1941W,

2901, 2911, 2921, 2951, 3925, 3945, 3925E and 3945E integrated services routers. The T1/E1 MFT VWIC3 cards

support both T1 and E1, providing additional flexibility in configuring the Cisco MFT VWIC3s for supporting T1,

fractional T1, E1, and fractional E1 for both voice and WAN applications. All MFT VWIC3 modules include the drop-

and-insert multiplexing capability, which eliminates costly external third-party channel service units/data service units

(CSUs/DSUs) and drop-and-insert multiplexers.

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