Cisco Reman 1Pt Multichannel T3 Enh Capability

The PA-MC-2T3-EC is a single-width port adapter that provides two T3 interface connections using BNC connectors. The PA-MC-T3-EC provides one T3 interface connection using BNC connectors. Hereafter, both versions of this port adapter will be referred to as the PA-MC-TE-EC. A channelized T3 provides 28 T1 lines multiplexed into the T3. In the channelized mode of operation, a PA-MC-T3-EC T3 link is channelized into 28 DS1 data lines in an industry standard multiplexing format. Each of the T1 lines contains 24 time slots of 64 or 56 kbps each. The T1 lines can support one or more user data channels which appear to the system as serial interfaces. Each serial interface is assigned one or more of the time slots giving the serial interface a bandwidth of n x 56 kbps or n x 64 kbps, where n is the number of time slots assigned. Any unused time slots of the T1 are filled with an idle channel pattern. The following restrictions apply: A time slot can only be used by one serial interface. A serial interface cannot use time slots from more than one T1 line. Each T3 line can have a maximum of 128 serial interfaces. Unused serial interfaces on one T3 cannot be used by the other T3 line. The PA-MC-T3-EC supports Cisco High-Level Data Link Control (HDLC), Frame Relay, PPP, and Switched Multimegabit Data Service (SMDS) Data Exchange Interface (DXI) encapsulations over each serial interface.