DS2151Q

The DS2151Q T1 single-chip transceiver (SCT) contains all the necessary functions for connection to T1 lines whether they be DS-1 long haul or DSX-1 short haul. The clock recovery circuitry automatically adjusts to T1 lines from 0 feet to over 6000 feet in length. The device DS2151Q can generate both DSX-1 line build-outs as well as CSU build-outs of -7.5dB, -15dB, and -22.5dB. The on-board jitter attenuator (selectable to either 32 bits or 128 bits) can be placed in either the transmit or receive data paths. The framer locates the frame and multiframe boundaries and monitors the data stream for alarms. It is also used for extracting and inserting robbed-bit signaling data and FDL data. The device DS2151Q contains a set of 64 8-bit internal registers that the user can access to control the operation of the unit. Quick access via the parallel control port allows a single micro to handle many T1 lines. The device DS2151Q fully meets all of the latest T1 specifications including ANSI T1.403-199X, AT&T TR 62411 (12-90), and ITU G.703, G.704,G.706, G.823, and I.431.