The Cisco Third-Generation 2-Port T1/E1 Multiflex Trunk Voice/WAN Interface supports data & voice applications. The Cisco MFT VWIC3 combines WAN-interface-card (WIC) & voice-interface-card (VIC) functions to provide unparalleled flexibility, versatility, & investment protection through its many uses. Customers who choose to integrate data & voice in multiple steps preserve their investment in a T1/E1 WAN interface because the Cisco MFT VWIC3 cards can be reused in packet voice applications.