PM8315-PI View Datasheet(PDF) - PMC-Sierra

Part Name

Description

Manufacturer

PM8315-PI

HIGH DENSITY T1/E1 FRAMER WITH INTEGRATED VT/TU MAPPER AND M13 MULTIPLEXER

PMC-Sierra 

STANDARD PRODUCT

DATASHEET

PMC-1981125

ISSUE 7

PM8315 TEMUX

HIGH DENSITY T1/E1 FRAMER WITH

INTEGRATED VT/TU MAPPER AND M13 MUX

• Provides an HDLC interface with 128 bytes of buffering for terminating the

facility data link.

• Provides performance monitoring counters sufficiently large as to allow

performance monitor counter polling at a minimum rate of once per second.

Optionally, updates the performance monitoring counters and interrupts the

microprocessor once per second, timed to the receive line.

• Provides an optional elastic store which may be used to time the ingress

streams to a common clock and frame alignment, or to facilitate per-DS0

loopbacks.

• 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.

• A pseudo-random sequence user selectable from 211 –1, 215 –1 or220 –1, may

be detected in the T1 stream in either the ingress or egress directions. The

detector counts pattern errors using a 24-bit non-saturating PRBS error

counter. The pseudo-random sequence can be the entire T1 or any

combination of DS0s within a framed T1.

• Line side interface is either from the DS3 interface via the M13 multiplex or

from the SONET/SDH Drop bus via the VT1.5, TU-11, VT2 or TU-12

demapper.

• System side interface is either serial clock and data, MVIP or SBI bus.

• Frames in the presence of and detects the “Japanese Yellow” alarm.

• Provides external access for up to two de-jittered recovered T1 clocks.

Each one of 21 E1 receiver sections:

• Frames to ITU-T G.704 basic and CRC-4 multiframe formatted E1 signals.

The framing procedures are consistent ITU-T G.706 specifications.

• Provides an HDLC interface with 128 bytes of buffering for terminating the

national use bit data link.

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

ETS 300 233.

• V5.2 link indication signal detection.

PROPRIETARY AND CONFIDENTIAL

4

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