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XRT94L43

SONET/SDH STS-12/STM-4 12 E3/DS3/STS-1 MAPPER

PRELIMINARY

REV. P1.0.0

3

PRODUCT FEATURES

SONET TRANSMITTER

• Performs standard STS-12/STM-4 Transmit Pro-

cessing

• Conforms to ITU-T 1.432, ANSI T1.105 and

Bellcore GR-253 Standards

• Provides 155.52 MHz 16-bit parallel interface

• Performs SONET frame insertion and accepts

external frame synchronization

• Performs Optional Transmit Data Scrambling

• Performs POH,TOH generation/insertion

• Generates transmit payload pointer (H1,H2) (fixed

at 522) with NDF insertion

• Inserts A1/A2 with optional error mask

• Computes and inserts BIP-8 (B1,B2) with optional

error mask

• Generates AIS-L, REI-L and RDI-L according to

receiver state with option of SW/HW insertion

• Inserts LOS and forces SEF by software

• Generates RDI-P and REI-P automatically with

optional SW/HW override

• Inserts fixed-stuff columns, calculates and inserts

B3 error code

SONET RECEIVER

• Performs standard STS-12/STM-4 receive process-

ing

• Provides fully programmable threshold detection for

SD and SF condition

• Provides section trace buffer with mismatch detec-

tion and invalid message detection

• Performs SONET Frame Synchronization

• Supports NDF, positive stuff and negative stuff for

pointer processor

• Performs receive data de-scrambling

• Performs POH and TOH interpretation/extraction

• Interprets payload pointer (H1,H2)

• Extracts data communication channels from D1-D3

and D4-D12

• Detects Out of Frame (OOF), Loss of Frame(LOF),

Loss of Signal(LOS) AND APS failure

• Detects Line Alarm Indication (L-AIS), Line Remote

Defect Indication (L-RDI) and Loss of Pointer

• Detects Path Alarm Indication, Path Remote Defect

Indication and Path extended RDI

• Provides Signal Label Monitor with PLM detection

• Supports path trace buffer with TIM-P and invalid

message detection

• Computes and compare B3, REI-L and REI-P

errors

• Computes and compare BIP-8 (B1,B2) and counts

the errors

MAPPER

• Performs standard SONET STS-1 mapping for DS3

conforming with Bellcore GR-253 and GR-499

• Performs SDH VC-3 mapping for DS3 and E3 to

conform ITU-T G.707

• Implements AU-3 to VC-3 multiplexing and de-mul-

tiplexing

• Provides STS-1 mapping and de-mapping func-

tions

• Accepts data from external STS-1 inputs

• In the transmit direction, provides STS-1 framing,

descrambling, performance monitoring and pointer

processing functions

• In the receive direction, provides frame generation

and scrambling

SONET/SDH INTERFACE

• Supports an 8-bit parallel interface at 77.76 MHz for

STS-12/STM-4 in Telecom bus format.

• Supports an 8-bit parallel interface at 19.44 MHz for

STS-3/STM-1 in Telecom bus format.

• Serial Interface at 622.08 MHz with SERDES

APS SUPPORT

• Supports both 1+1 and 1:1 configurations

• APS interface consists of two Serial Interface with

SERDES.

• Provides both input and output interface for APS

E3/DS3/STS-1 INTERFACE

• Supports up to 12 E3/DS3/STS-1 tributaries

• In the receive direction, generates the single-rail or

dual-rail data along with smoothed E3/DS3 clock as

well as start of frame indication

• Provides RX serial and single-rail (NRZ) data and

clock at 51.84 MHz for STS-1E

• In transmit direction, accepts clear channel E3/DS3

signal and performs framing on incoming signal

DS3 RECEIVE FRAMER

• Offers off-line framing algorithm

• Complies with the standards as: Bellcore TR-NWT-

000499 and TR-NWT-000009

• Supports overhead extraction

• Provides line code violation detection and excess

zero count

• Reports and counts FEBE