Dallas Semiconductor's DS26556, the only multiport T1/E1/J1 transceiver available with a cell/packet/TDM interface, according to the company, contains all the line interface and framer functions necessary to connect four T1, E1, or J1 lines. No relays or switched external components are required, and a single clock supports all standard T1, E1, or J1 operating modes.
This device supports UTOPIA (Level 2 and 3) and POS/PHY (Level 2 and 3) system interfaces, as well as a TDM backplane interface that can operate at bus rates up to 16,384 MHz. Additional features include software-selectable receive and transmit termination, one HDLC controller per port, programmable bit error-rate testing, and optional crystalless jitter attenuation.
The DS26556 is available in a small 17 x 17 mm BGA package.
For more information contact CST Electronics, +27 (0)11 452 0706 or Electrocomp (Value Added Distributor), +27 (0)11 458 9000.
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