This module supports voice, data, and integrated voice/data applications. For data applications, the VWIC provides a single-port WAN Interface Card (WIC) for T1/FT1 with an integrated DSU/CSU. For a packet voice solution, the VWIC provides a single-port Voice Interface Card (VIC) with integrated DSU/CSU, that combines with the Digital T1/E1 Packet Voice Trunk Modules.