The Cisco 2-Port MFT VWIC2 interface cards increase configuration flexibility on Cisco multiservice access routers, eliminating the need for two single-port T1/E1 WICs. Increasing the T1/E1 port density in a single WIC or HWIC slot enables applications such as local serial aggregation with the 2-port high-speed serial WIC or 2-port asynchronous/synchronous serial WIC (part number WIC-2T or WIC-2A/S), or ISDN backup with the Cisco 1-Port ISDN BRI S/T WAN Interface Card (part number WIC-1B-S/T-V3) or the 1-port ISDN with NT-1 WIC (part number WIC-1B-U-V2).
The Cisco MFT VWIC2 cards also support a channelized capability where the T1 or E1 service can be flexibly split into two or more fractional channel groups. Thus a single physical port can provide connection to multiple sites. (Note: If this mode is chosen, only a single port can be supported in each WIC slot and it works only on ISRG1s; it is not available on the Integrated Services Routers Generation 2 (ISR G2).)
The second-generation 1- and 2-port G.703 multiflex trunk voice/WICs (product numbers VWIC2-1MFT-G703 and VWIC2-2MFT-G703) support both unstructured E1 (G.703) and all the features of the other Cisco MFT VWIC2 cards, including drop and insert. Additional flexibility is provided on the 2-port G.703 multiflex trunk voice/WICs with the capability to configure one port for unstructured E1 (G.703) while configuring the other for standard framed E1.
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