The DS33Z11 extends a 10/100 Ethernet LANsegment by encapsulating MAC frames in HDLC orX.86 (LAPS) for transmission over a PDH/TDM datastream. The serial link supports bidirectionalsynchronousinterconnect up to 52Mbps over xDSL,T1/E1/J1, T3/E3, V.35/Optical, OC-1/EC-1, orSONET/SDH Tributary.The device performs store-and-forward of packetswith full wire-speed transport capability. The built-inCommitted Information Rate (CIR) controllerprovides fractional bandwidth allocation up to theline rate in increments of 512kbps. The DS33Z11can operate with an inexpensive external processor,EEPROM or in a stand-alone hardware mode.