PM7341 datasheet(99/413 Pages) PMC

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PRELIMINARY

INVERSE MULTIPLEXING OVER ATM

PM7341 S/UNI-IMA-84

DATASHEET

PMC-2000223

ISSUE 4

INVERSE MULTIPLEXING OVER ATM

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

101

Recovery (LASR) procedure. When the links change state, the RIPP also

coordinates the rate change between the round-robin procedures located in the

receive and transmit data paths and their respective rate schedulers.

Since failures are based upon the persistence of defects, the defects are

detected and passed as interrupts/status to the management plane. PM is

responsible for the integration of defects into failure conditions and to set the

failure conditions in the S/UNI-IMA-84.

Table 3

PM command description

Command

Description

Add_group

Starts up a group state machine and the link

state machines for the links configured in the

group. Group and links need to be configured

prior to issuing this command. As a result of this

command, the transmitter will start to send out

IMA frames on the links specified as part of the

group, and the receiver will start to look for and

analyze ICP cells received on the links within

the group. If a sufficient number of links are

detected to be active, the group will transition to

the operational state and start to transmit and

receive ATM traffic.

Delete_group

Remove an existing group and all its links

immediately. This command will take the group

state machine to the “not configured” state and

all of the links in the group to the “not in group”

state. The transmit links will cease to transmit

IMA frames and will commence to transmit

physical-layer idle cells until the links are

reused. For group deletion without any loss of

data, the links may be deleted or inhibited to

stop traffic on the group or the group may be

inhibited prior to deleting the group.

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