FEATURES

? Monolithic single-chip device that integrates eight datacom E1 framers and transmitters for terminating duplex E1 signals.

? Frames to ITU-T G.704 basic and CRC-4 multiframe formatted E1 signals and is consistent with ITU-T G.706 specifications.

? Extracts/inserts up to three HDLC links from/to arbitrary time slots to support the D-channel for ISDN Primary Rate Interfaces, the datalink in the National Use Bits and the C-channels for V5.1/ V5.2 interfaces as per ITU-T G.964, ITU-T G.965, ETS 300-324-1, and ETS 300-347-1.

? Provides an optional backplane interface which is compatible with Mitel ST?-bus, AT&T CHI? and MVIP PCM backplanes, supporting data rates of 2.048 Mbit/s and 8.192 Mbit/s.

? Supports transfer of PCM data to and from 2.048 Mbit/s backplane buses.

? Supports fractional E1 backplane interface.

? Provides jitter attenuation in both the receive and transmit directions.

? Provides per-timeslot line loopback and per-link diagnostic and line loopbacks.

? Provides signaling extraction and insertion on a per-channel basis.

? Provides a Pseudo Random Binary Sequence (PRBS) generator and detector which may be configured for insertion/detection on a per-timeslot or multiple timeslot basis.

? Software-compatible with the PM6341 E1XC Single E1 Transceiver, the PM6344 EQUAD Quad E1 Framer, the PM4388 TOCTL Octal T1 Framer, and PM4351 COMET Combined E1/T1 Transceiver.

? Pin-compatible with the PM4388 TOCTL with a seamless interface to the PM4314 QDSX quad line interface unit.

? Provides an 8-bit microprocessor bus interface for configuration, control, and status monitoring.

? Low power 3.3 V CMOS technology with 5 V tolerant inputs.

? Supports standard 5-signal P1149.1 JTAG boundary scan.

? Provides a -40 to +85° industrial temperature operating range.

? Available in a rectangular 128-pin PQFP (14 by 20 mm) package.

APPLICATIONS

? High density Internet E1 interfaces for multiplexers, switches, routers, and digital modems

? Frame Relay Switches and Access Devices (FRADS)

? Digital Access and Cross-Connect Systems (DACS)

? SDH Add/Drop Multiplexers (ADMs)