The Cisco MFT VWIC2 cards are offered in single- and dual-port
versions, which can be used and then redeployed as network
requirements change, thereby addressing several applications:
• T1/E1 data---The Cisco 1- and 2- port T1/E1 MFT VWIC2 versions
act as a WIC, supporting T1, fractional T1, E1, (including
structured G.703 with G.704 framing), fractional E1, and
E1structured G.703 applications. To simplify remote management,
these MFT VWIC2 cards integrate a fully managed DSU/CSU for T1
deployments and a fully managed DSU for E1 deployments.
• E1/G.703 data---The Cisco 1- and 2- port G.703 MFT VWIC2 versions
act as a WIC, supporting T1, fractional T1, E1 (including
structured G.703 with G.704 framing), fractional E1, and
unstructured E1 (G.703) applications. To simplify remote
management, the G.703 version includes a fully managed DSU. The
G.703 versions also support all the capabilities on the T1/E1
versions.
• T1/E1 packet voice---The Cisco 1- and 2- port T1/E1 MFT VWIC2
(voice and WAN) versions act as a VIC, supporting packet voice
applications by providing T1, fractional T1, E1, and fractional E1
connections to private branch exchanges (PBXs) and central offices,
thereby enabling new services and reducing voice and fax toll
charges.
• Mixed data and packet voice---The Cisco MFT VWIC2 interface cards
can simultaneously support both data and voice, reducing the
complexity and number of network components and facilitating a
graceful migration to bandwidth-efficient packet voice.
• Mixed data and packet voice with drop and insert---The Cisco MFT
VWIC2 cards can be deployed as a T1/E1 drop-and-insert multiplexer
with integrated DSUs/CSUs, reducing the complexity of the network
and the cost of the central-office ports by efficiently combining
time-division multiplexing (TDM) voice (PBX), IP voice, and data on
the same trunks. Note the Cisco 1721, 1751 and 1760 support drop
and insert between two ports over a single VWIC2 card while Cisco
2800 and 3800 ISR routers supports drop and insert between two
ports over a single VWIC2 card and two ports over two different
VWICs.
