FEATURES
• Monolithic single-chip device which integrates four full-featured E1 framers and transmitters for terminating duplex E1 signals.
• Frames to a G.704 2.048 Mbit/s signal. Frames to the signalling multiframe and to the CRC multiframe when enabled.
• Supports HDB3 or AMI line codes.
• Supports transfer of PCM and signalling data to/from 2.048 Mbit/s or 16.384 Mbit/s backplane buses. Supports n × DS0 backplane interface for fractional E1.
• Provides Channel-Associated Signalling (CAS) extraction/insertion, programmable idle and digital milliwatt code substitution, and up to three multiframes of signalling debounce on a per-channel basis.
• Provides trunk conditioning which forces programmable trouble code substitution and signalling conditioning on all/selected channels.
• Provides an HDLC interface for terminating/generating a datalink.
• Optionally extracts the datalink from timeslot 16 or from any combination of the national bits.
• Software and functionally compatible with the PM6341 E1XC Single E1 Transceiver. Pin-compatible with the PM4344 TQUAD Quad T1 Framer.
• Provides an 8-bit microprocessor bus interface for configuration, control, and status monitoring.
• Low power 5 V CMOS technology.
• Available in a rectangular 128-pin PQFP (14 by 20 mm) package.

APPLICATIONS
• E1/E3 Multiplexers and Digital Private Branch Exchanges (PBXs)
• E1 Frame Relay Interfaces
• E1 ATM Interfaces
• Fractional E1 Interfaces
• Digital Access and Cross-Connect Systems (DACS) and Electronic DSX Cross-Connect Systems (EDSXs)
• Digital Loop Carriers (DLCs)
• E1 Channel Service Units (CSUs) and Data Service Units (DSUs)
• ISDN Primary Rate Interfaces (PRI)
• SDH Add/Drop Multiplexers (ADMs)