The TSU ACE is a low cost, full-featured T1/FT1 Data Service/ Channel Service Unit (DSU/CSU). The TSU ACE provides an interface between T1 or Fractional T1 service and the end user’s Data Terminal Equipment (DTE) for applications such as LAN-to-LAN bridging, Frame Relay circuit termination and video-conferencing. The TSU ACE provides access to traditional dedicated point-to-point T1services as well as network termination for frame relay.