PMC-Sierra PM5347 Typical Application, STS-3C/STM-1 Overhead Byte Usage, Path Overhead POH

PM5347 S/UNI-155-PLUS

155 Mb/s SATURN User Network Interface for WANs

TYPICAL APPLICATION

155 Mb/s ATM SWITCH PORT INTERFACE

E/O

O/E

Reference	Transmit	Transmit
	Overhead	Alarm Insert
Clock	Insert	Signals
	TRCLK+/-		TCA
			TXPRTY[1:0]
	TXD+/-
			TDAT[15:0]
			TSOC
		PM5347	TWRENB
		S/UNI-155-PLUS ™	TFCLK
	155 Mb/s SATURN™ User Network Inter-
		face for WANs	RCA
	RRCLK+/-		RXPRTY[1:0]
			RDAT[15:0]
	RXD+/-		RSOC
	ALOS+/-		RRDENB
			RFCLK
	Receive	Receive	Microprocessor Bus for Configu-
	Overhead	Alarm Detect	ration, Status, and Control
	Extract	Signals

Transmit

ATM

Process

Receive

ATM

Process

Switching Network

STS-3C/STM-1 OVERHEAD BYTE USAGE

A1						C1/J0	C1	C1
B1						F1
D1						D3
H1	H1	H1	H2	H2	H2	H3	H3	H3
B2	B2	B2	K1			K2
D4			D5			D6
D7			D8			D9
D10			D11			D12
Z1					M1	E2

J1

B3

C2

G1

Z5

Transport Overhead SOH Path Overhead POH

Head Office:	To order documentation,
PMC-Sierra, Inc.	send email to:
#105 - 8555 Baxter Place	document@pmc-sierra.com
Burnaby, B.C. V5A 4V7	or contact the head office,
Canada	Attn: Document Coordinator
Tel: 604.415.6000
Fax: 604.415.6200

All product documentation is available on our web site at: http://www.pmc-sierra.com For corporate information, send email to: info@pmc-sierra.com

PMC-930909 (R7)

￿1998 PMC-Sierra, Inc. October, 1998

SATURN, SCI-PHY, S/UNI-155, S/UNI-155-LITE, S/UNI-155-PLUS, and S/UNI-622 are trademarks of PMC-Sierra, Inc.

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