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)