PM4354 Просмотр технического описания (PDF) - PMC-Sierra

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PM4354

FOUR CHANNEL COMBINED E1/T1/J1 TRANSCEIVER/FRAMER

PMC-Sierra 

RELEASED

PM4354 COMET-QUAD

DATASHEET

PMC-1990315

ISSUE 6

FOUR CHANNEL COMBINED E1/T1/J1

TRANSCEIVER / FRAMER

• Provides ESF bit-oriented code detection and an HDLC/LAPD interface for terminating the ESF facility

data link.

• Supports polled or interrupt-driven servicing of the HDLC interface.

• Extracts the data link in ESF mode and extracts a datalink in the E1 national use bits.

• Extracts 4-bit codewords from the E1 national use bits as specified in ETS 300 233

• Extracts up to three HDLC links, to an H-MVIP Bus, to support the D-channel for ISDN Primary Rate

Interfaces and the C-channels for V5.1/V5.2 interfaces. Detects the V5.2 link identification signal.

• Provides a two-frame elastic store buffer for backplane rate adaptation that performs controlled slips

and indicates slip occurrence and direction.

• Provides DS-1 robbed bit signaling extraction, with optional data inversion, programmable idle code

substitution, digital milliwatt code substitution, bit fixing, and two superframes of signaling debounce

on a per-channel basis.

• Frames to the E1 signaling multiframe alignment when enabled and extracts channel associated

signaling. Alternatively, a common channel signaling data link may be extracted from timeslot 16.

• Indicates signaling state change, and two superframes of signaling debounce on a per-DS0 basis.

• Provides trunk conditioning which forces programmable trouble code substitution and signaling

conditioning on all channels or on selected channels.

• Provides diagnostic, line loopbacks and per-DS0 payload loopback.

• A pseudo-random sequence user selectable from 211 –1, 215 –1 or 220 –1, may be detected in the

T1/E1 stream in either the backplane receive or backplane transmit directions. The detector counts

pattern errors using a 24-bit saturating PRBS error counter.

• Provides four single-rail PCM and signaling data outputs for 1.544 Mbit/s or 2.048 Mbit/s backplane

buses.

1.2 Transmitter section:

• Supports transfer of transmitted single rail PCM and signaling data from 1.544 Mbit/s and 2.048 Mbit/s

backplane buses.

• Generates DSX-1 shorthaul and DS-1 longhaul pulses with programmable pulse shape compatible

with AT&T, ANSI and ITU requirements.

• Generates E1 pulses compliant to G.703 recommendations.

• Provides a digitally programmable pulse shape extending up to 5 transmitted bit periods for custom

long haul pulse shaping applications.

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC. AND FOR ITS CUSTOMERS’ INTERNAL USE

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