PMC-931128 (R6)

 1998 PMC-Sierra, Inc. September, 1998

PM5312

PMC-Sierra,Inc.

SONET/SDH Transport Overhead Terminating Transceiver

STTX

FEATURES

• Monolithic, SONET/SDH Transport

Overhead Terminating Transceiver for

use in STS-1, STS-3 (STM-1), or

STS-12 (STM-4) applications.

• Operates in STS-1 bit-serial mode,

STS-1 byte-serial mode, STS-3/STM-1

byte-serial mode, or STS-12/ATM-4

byte-serial mode.

• Compatible with PM5355 S/UNI-622



physical layer interface, PM5344

SPTX SONET/SDH Path Terminating

Transceiver, and with commercially

available 622 Mbit/s serial-to-parallel

conversion devices.

• Performs byte-interleaved multiplexing

of lower-rate, drop-side, SONET/SDH

data streams.

• Optionally inserts the framing bytes

(A1 and A2) and the STS identification

bytes (C1) in to the transmit stream.

• Performs frame synchronous

descrambling and scrambling.

• Compares the bit-interleaved parity

error detection codes (B1 and B2) for

the receive stream. Inserts B1 and B2

in the transmit stream.

• Inserts line Far-End Block Errors

(FEBEs) into the Z2 growth byte based

on received B2 errors.

• Accumulates near-end errors (B1 and

B2) and far-end errors (Z2).

• Extracts and inserts the order wire

channels (E1 and E2).

• Extracts and inserts the data

communications channels (D1-D3 and

D4-D12).

• Extracts and inserts the section user

channel (F1).

• Extracts and inserts the Automatic

Protection Switch (APS) channel (K1

and K2). The receive APS bytes are

also filtered and extracted into internal

registers.

• Detects Loss Of Signal (LOS), Out Of

Frame (OOF), Loss Of Frame (LOF),

Far-End Receive Failure (FERF), line

Alarm Indication Signal (AIS), and

protection switching byte failure

alarms.

• Inserts FERF and AIS in the transmit

stream.

• Provides LOS insertion, framing

pattern error insertion, and coding

violation insertion (B1 and B2) for

diagnostic purposes. B1 and B2 error

can also be generated “on-the-fly”

using an error insertion mask.

• Provides a transmit and receive ring

control port, allowing alarm and

maintenance signal control and status

to be passed between mate STTXs for

applications in ring-based add/drop

multiplexers.

• Low power, +5 V, CMOS technology.

Device has TTL/CMOS-compatible

inputs and outputs.

• Available in a high performance 208-

pin copper slugged (28 by 28 mm)

Plastic Quad Flat Pack (PQFP)

package.

APPLICATIONS

• OC-N to OC-M Multiplexers

• SONET/SDH Add/Drop Multiplexers

• SONET/SDH Terminal Multiplexers

• ATM Transmission Systems

• Broadband ISDN User Network

Interfaces (UNIs)

• SONET/SDH Test Equipment

BLOCK DIAGRAM

Transmit

Ring Control

Port

Line Side

System Side

Status Control

Port

Transmit Section

(Regenerator Section)

O/H Processor

Receive Section

(Regenerator

Section)

O/H Processor

Transmit Line

(Multiplexer Section)

O/H Processor

Receive Line

(Multiplexer Section)

O/H Processor

TOFP

TOUT[7:0]

TSOUT

Par/Ser

TSICLK

RICLK

RIFP

RIN[7:0]

RSIN

Ser/Par

RSICLK

Receive Ring

Control Port

Microprocessor

Interface

Byte

Interleaved

Multiplex

Byte

Interleaved

Demultiplex

ROUT1[7:0]

ROUT2[7:0]

ROUT3[7:0]

ROUT4[7:0]

ROCLK

ROFP

Transmit

O/H

Access

TIN1[7:0]

TIN2[7:0]

TIN3[7:0]

TIN4[7:0]

TICLK

TIFP

TDIS

Receive O/H

Access