PM7341 datasheet(36/413 Pages) PMC

36 / 413 page

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

differential delay between the links within a group and applies the link and group

state machine logic to coordinate the activation and deactivation of groups and

links with the far end. As cells are received, they are stored in an external FIFO

structure; this structure is based upon the IMA frame boundaries and the IMA

frame sequence number. When links or groups are determined to be active by

the link and group state machines, the data is played out to the Any-

PHY/UTOPIA Interface at a constant rate to mimic the existence of a single

higher bandwidth physical link.

Once a group of links is established, links can be added or deleted from the

group. Under software control, the S/UNI-IMA-84 will perform all necessary steps

to add or delete links from previously established groups.

In order to aid diagnostics, a line side loopback and a UTOPIA side loopback are

provided. Also, an ICP cell trace feature is provided. When the ICP cell trace has

been enabled for a group, the S/UNI-IMA-84 will place those ICP cells where a

SCCI field change is detected into a buffer that is accessible to the

microprocessor.

PM7341 Datasheet(PDF) 36 Page - PMC-Sierra, Inc