The CN8380 is a fully integrated quad line interface unit for both 1.544 Mbps (T1) and 2.048 Mbps (E1) applications. It is designed to complement T1/E1 framers or operate as a stand-alone line interface to synchronous or plesiochronous mappers and multiplexers.

Distinguishing Features

• Four T1/E1 short haul line interfaces in a single chip

• On-chip CLAD /system synchronizer

• Digital (crystal-less) jitter attenuators selectable for transmitter/receiver on each line interface

• Meets AT&T pub 62411 jitter specs

• Meets ITU G.703, ETS 300 011 (PSTNX) Connections

• AMI/B8ZS/HDB3 line codes

• Host serial port or hardware only control modes

• On-chip receive clock recovery

• Common transformers for 120/75 Ω E1 and 100 Ω T1

• Low-power 3.3 V power supply

• Transmitter performance monitor

• Compatible with latest ANSI, ITU-T, and ETSI standards

• 128-pin MQFP package

• Remote and local loopbacks

Applications

• SONET/SDH multiplexers

• T3 and E3/E4 (PDH) multiplexers

• ATM multiplexers

• Voice compression and voice processing equipment

• WAN routers and bridges

• Digital loop carrier terminals (DLC)

• HDSL terminal units

• Remote concentrators

• Central office equipment

• PBXs and rural switches

• PCM/voice channel banks

• Digital access and cross-connect systems (DACS)