PM4341AT1XC
DATA SHEET
PMC-900602
ISSUE 7
T1 FRAMER/TRANSCEIVER
Provides ESF bit-oriented code detection, and an HDLC/LAPD interface for
terminating the ESF data link.
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Supports polled, interrupt-driven, or DMA servicing of the HDLC interface.
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Extracts the data link in ESF, T1DM (DDS) or SLC®96 modes. Extracts the D-
channel for Primary Rate interfaces.
Provides a two-frame elastic store buffer for jitter and wander attenuation that
performs controlled slips and indicates slip occurrence and direction.
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Provides robbed bit signalling extraction, with optional data inversion,
programmable idle code substitution, digital milliwatt code substitution, bit
fixing, and 2 superframes of signalling debounce on a per-channel basis.
Provides trunk conditioning which forces programmable trouble code
substitution and signalling conditioning on all channels or on selected
channels.
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Optionally provides dual rail digital PCM output signals to allow BPV
transparency. Also supports unframed mode.
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Supports transfer of received PCM and signalling data to 1.544 Mbit/s
backplane buses or to 2.048 Mbit/s backplane buses.
The transmitter section:
Supports transfer of transmitted PCM and signalling data from 1.544 Mbit/s or
2.048 Mbit/s backplane buses.
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Formats data to SF, ESF, T1DM (DDS), and SLC®96 format DS1 signals.
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Optionally accepts dual rail digital PCM inputs to allow BPV transparency.
Also supports unframed mode and framing bit, CRC, or data link by-pass.
Provides signalling insertion, programmable idle code substitution, digital
milliwatt code substitution, and data inversion on a per channel basis.
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Provides trunk conditioning which forces programmable trouble code
substitution and signalling conditioning on all channels or on selected
channels.
Provides minimum ones density through Bell (bit 7), GTE or DDS zero code
suppression on a per channel basis.
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Detects violations of the ANSI T1.403 12.5% pulse density rule over a moving
192 bit window or optionally stuffs ones to maintain minimum ones density.
Allows insertion of framed or unframed in-band loopback code sequences.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
2
PMC [ PMC-SIERRA, INC ]
