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 Voice Port Configuration Guide.
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