Specifications

Data Sheet

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Offers easy migration to bandwidth-efficient packet voice, enabling new services

Customers can choose to integrate data and voice in stages to preserve their investment in WAN interfaces. For

example, the Cisco MFT VWIC3 can support data-only applications as a WAN interface, and then be reused to

integrate data and voice with the drop-and-insert multiplexer function or configured to support packetized voice

(voice over IP [VoIP] or voice over Frame Relay [VoFR]).

Applications

Packet Voice Solutions: PBX and Central-Office Connectivity

The Cisco MFT VWIC3 interface cards, through its digital T1/E1 ports, supply PBX and public-switched-telephone-

network (PSTN) connectivity for integrated services routers with the on-board EHWIC slots. The integrated services

routers support H.323-, Session Initiation Protocol (SIP)-, Media Gateway Control Protocol (MGCP)-, and Skinny

Client Control Protocol (SCCP)-based VoIP.

Data Solutions: 1- , 2- and 4-Port T1/E1 WIC with Integrated DSU/CSU

The Cisco MFT VWIC3 interface cards simplify branch-office connectivity by integrating the functions of a router,

T1/E1, and fractional T1/E1 serial interface with a fully managed DSU/CSU.

When used for “data-only” WAN connectivity, the Cisco MFT VWIC3 cards support numerous functions, including

Cisco IOS

Software Command-Line Interface (CLI)-initiated loopback control, similar to the popular 1 Port

T1/Fractional T1 DSU/CSU WAN Interface Card (part number HWIC-1DSU-T1. Additionally, the MFT VWIC3 is also

offered in quadruple-port versions, enabling increased WAN port density in Cisco 2911, 2921, 2951 and Cisco 3900

Series routers. The T1/E1 MFT VWIC3 versions include integrated DSU functions for E1 deployments and integrated

CSU and DSU functions for T1 deployments, simplifying remote network management.

The Cisco 4-port MFT VWIC3 interface cards increase configuration flexibility on Cisco Systems

integrated services

routers, eliminating the need for two dual-port T1/E1 HWICs. Increasing the T1/E1 port density in a single EHWIC

slot helps enable applications such as local serial aggregation with the 2-port high-speed serial WAN Interface Card

(part number HWIC-2T ), or ISDN backup with the 4 Port ISDN BRI S/T WAN Interface Card (part number HWIC-4B-

S/T) or the 1 port ISDN with NT-1 WAN Interface Card (part number HWIC-1B-U).

The Cisco MFT VWIC3 cards also support a channelized capability where the T1 or E1 service can be flexibly split

into one or two fractional channel groups. Thus a single physical port can provide connection to multiple sites.

The Third-generation 1- and 2-port G.703 Multiflex Trunk voice/WAN Interface Cards (product numbers VWIC3-

1MFT-G703 and VWIC3-2MFT-G703) support not only unstructured E1 (G.703) but also all the features of the other

Cisco MFT VWIC3 cards, including drop and insert. Additional flexibility is provided on the 2 port G.703 Multiflex

Trunk voice/WAN Interface Cards with the capability to configure one port for unstructured E1 (G.703) while

configuring the other for standard framed E1.

Multiplexed Data and Voice Solutions: 2- and 4-Port T1/E1 Drop-and-Insert Multiplexer with Integrated

DSU/CSU

The Cisco 1-, 2- and 4-port MFT VWIC3 interface cards simplify branch-office connectivity by helping enable Cisco

2900 and 3900 routers to consolidate the functions of a router, a fully managed drop-and-insert multiplexer, and a

fully managed DSU/CSU into a single box. (It is possible to use two Cisco 1-port MFT VWIC3 interface cards for

supporting the drop-and-insert feature. Generally, a Cisco 2- or 4-port MFT VWIC3 is more appropriate because at

least 2 ports are required.) Typically a drop-and-insert multiplexer is used for channelized (that is, TDM) integration

of data and voice onto a single T1, fractional T1, E1, or fractional E1 connection to the central office. Sharing a line

can significantly reduce costs over those of two separate physical lines to the central office. Although the normal use