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)