Features
Cisco Fourth-Generation Multi-flex Trunk Voice/Channelized Data T1/E1 Module
Expansion module
Support data and voice applications on the Cisco 4451-X integrated services routers
These cards combine WAN-interface-card (WIC), voice-interface-card (VIC)
ISDN Primary Rate Interface (PRI), dial-access integration, and channelized-data (CE1T1) functions
Provide unparalleled flexibility, versatility, and investment protection through their many uses
Integrate data and voice in multiple steps preserve their investment in a T1/E1 WAN interface