© VITESSE SEMICONDUCTOR CORPORATION

Page 1

12/1/99

741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896

VITESSE

SEMICONDUCTOR CORPORATION

Advance Product Information

VSC8151

2.488Gb/s SONET/SDH

STS-48/STM-16 Section Terminator

G52225-0, Rev. 2.9

Features

General Description

The VSC8151 is a 2.488Gb/s Section Termination device which both monitors and modifies the section and

line overhead of a received SONET/SDH signal, and can generate AIS-L maintenance signals for trouble sec-

tionalization. These features allow all section termination requirements to be supported for Operations, Admin-

istration, Management, and Provisioning (OAM&P) functions in SONET/SDH terminal and optical networking

applications. An integrated 2.488Gb/s serial transceiver isolates the SONET/SDH signal interface, allowing

protocol information to be exchanged with programmable logic using a low-speed TTL interface.

VSC8151 Functional Block Diagram

NOTE: References (R#-#) or (O#-#) refer to the SONET requirement or option specification listed in

Bellcore document GR-253 CORE Issue 2, Rev. 2, January 1999.

Functional Overview

The VSC8151 is divided into two logic sections, a monitoring section and a modification section, each

interfaced externally through both 2.5Gb/s serial interfaces as well as 16-bit parallel interfaces. Incoming

• Integrated 2.488Gb/s Transceiver

• SONET/SDH Transport Overhead Output

• SONET/SDH Transport Overhead Modification

• B1 Error Detection, Re-calculation, and Insertion

• Support for Multiple SONET/SDH Rates

• LOF/SEF Alarm Generation

• Section & Line AIS Insertion

• 50

Ω Source Terminated 2.488Gb/s I/O

1:8

DMX

FRAMING

CONTROL

& ALARM

DETECTION

RXSIN+/-

RXSCLKIN+/-

DESCRAMBLER

RXSEF

RXFPOUT

RXFRERR

RXLOF

B1

MONITOR

OVERHEAD

OUTPUT

RXOHCLK

RXOHOUT[7:0]

OVERHEAD

INPUT &

INTERNAL

CONTROL

TXOHIN[7:0]

AIS

GENERATION

SCRAMBLER

& B1 CALC

8:1

MUX

TXSCLKOUT+/-

TXSOUT+/-

TXPOUT[15:0]

POUTCLK

TXFPOUT

LOS

SYSRST

TXSCLKIN+/-

ASSEMBLER

TXWRENA

TXOHWI

POUTCLK

RXPIN[15:0]

TXADDR[5:0]

RXPIN[7:0]