PM4344
Quad T1 Framer
FEATURES
• Monolithic single-chip device that
integrates four full-featured T1 framers
and transmitters for terminating duplex
DS1 signals.
• Supports SF, ESF, T1DM (DDS), and
SLC®96 format DS1 signals.
• Supports unframed mode. Supports
B8ZS or AMI line codes.
• Supports transfer of PCM and
signalling data to/from 1.544 Mbit/s,
2.048 Mbit/s, 12.352 Mbit/s, or
16.384 Mbit/s backplane buses.
• Supports n x DS0 backplane interface
for fractional T1.
• Provides robbed-bit signalling
extraction/insertion, programmable idle
and digital milliwatt code substitution,
and two superframes 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 ESF bit-oriented code
detection/generation, and an HDLC
interface for terminating/generating the
ESF data link.
• Software and functionally compatible
with the PM4341A T1XC Single T1
Transceiver. Pin-compatible with the
PM6344 EQUAD Quad E1 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
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