Head Office:

PMC-Sierra, Inc.

#105 - 8555 Baxter Place

Burnaby, B.C. V5A 4V7

Canada

Tel: 604.415.6000

Fax: 604.415.6200

Packet/ATM Traffic Manager and Switch

To order documentation,

send email to:

document@pmc-sierra.com

or contact the head office,

Attn: Document Coordinator

PMC-2010038 (r3)

© Copyright PMC-Sierra, Inc. 2001. All

rights reserved. June 2001

S/UNI is a registered trademark of

PMC-Sierra, Inc.

Any-PHY and SCI-PHY are trademarks of

PMC-Sierra, Inc.

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

Released

PM7329 S/UNI-APEX-1K800

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

CONGESTION CONTROL

• Traffic discard thresholds configurable

per connection (independent CLP0

and CLP1 thresholds), per class, per

port, and per direction.

• Guaranteed Frame Rate (GFR)

implemented via CLP0 minimum buffer

size reservation per connection.

QUEUING & SCHEDULING

• 1024 traffic staging queues (one per

connection) individually assignable to

any CoS on any port.

• 512 + 20 scheduling queues: 4 CoS

queues per port, 128 line ports, 4 WAN

ports, and 1 processor port.

• Each port’s queuing and scheduling is

configurable as cell at a time or packet

at a time.

• Connections are scheduled into each

class queue using configurable

weighted fair queuing (cell mode), or

FIFO (frame mode).

• Classes are scheduled into ports using

strict priority with configurable

minimum bandwidth reservation.

• Ports are scheduled onto their

corresponding bus using a

configurable weighted interleaved

round robin algorithm.

• On the WAN ports: rate shaping,

individually configured per connection,

within four classes.

ACCOUNTING

• Per connection CLP0/CLP1 upstream/

downstream Tx counts.

• Error statistics accumulation.

• CLP0/CLP1 cell discard counts with

indication of connection ID of last cell

discarded.

APPLICATIONS

• Mini Digital Subscriber Loop Access

Multiplexer (mini-DSLAM).

• Subscriber Access equipment.

• Digital Loop Card traffic aggregation.

TYPICAL APPLICATION

S/UNI-APEX-1K800 IN OC3 MINI-DSLAM APPLICATION

Core Card

PHY

Host CPU

Any-PHY/

SCI-PHY

Context

SSRAM

Packet/Cell

SDRAM

Ingress

SSRAM

Egress

SSRAM

PM7351

S/UNI-

VORTEX

up to 31

Utopia

L2 ports

line cards

PM7350

S/UNI-

DUPLEX

DSL PHY

DSL PHY

200

Mbit/s

LVDS

up to 31

Utopia

L2 ports

line cards

PM7350

S/UNI-

DUPLEX

DSL PHY

DSL PHY

Up

to

8

LV

DS

lin

ks

to

S/

UN

I-

DU

PL

EX

de

vic

es

pe

r S

/U

NI

-V

OR

TE

X

PM7329

S/UNI-APEX-

1K800

PM7328

S/UNI-

ATLAS-

1K800

line interface

Digital Loop Card

DSL PHY

DSL PHY

PHY

Host CPU

Any-PHY/

SCI-PHY Bus

Context

SSRAM

Packet/Cell

SDRAM

Ingress

SSRAM

Egress SSRAM

DSL PHY

expansion

PM7329

S/UNI-APEX-

1K800

PM7328

S/UNI-ATLAS-

1K800

S/UNI-APEX-1K800 IN OC3 DIGITAL LOOP CARD APPLICATION