PM7340 S/UNI-IMA-8
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
DATA SHEET
PMC-2001723
ISSUE 3
INVERSE MULTIPLEXING OVER ATM
12.5.3 Adding a Group
In order to add a group, the Group and Link configuration should be performed.
Next, the Add_Group command should be issued. This command will initiate the
Group and Link State Machines. Is starts the GSM arbitration and automatically
starts a LASR procedure.
The Add_Group command continues after the CMD_ACK is returned. The
completion of the command is generally indicated by an event that indicated
either that the process timed-out or the group has become operational. If a
timeout occurs, plane management should take appropriate action and either
restart the group with new parameters or add additional links to the group.
The event that indicates that the Add_Group command has completed
successfully is either the GTSM_INT with the GTSM state = Operational or
GSM_INT with the GSM state = Operational.
Events that indicate that the Add_Group command has completed but was not
successful are the following:
NE_ABORT_INT
FE_ABORT_INT
GROUP_TIMEOUT_INT
FE_TIMEOUT_INT
Events that indicate that individual links are experiencing problems and did not
become active are the following:
DIFF_DELAY_INT
INVALID_ICP_INT
RX_TIMEOUT_INT
TX_TIMEOUT_INT
In order to track the progress of the command, interrupts may be enabled for
GSM state changes and for the LSM state changes for all of the links. This may
result in a large number of events if the group includes a large number of links.
NOTE: If the TRL link is not validated on the RX side, since the group does not
have a valid TRL, the group will not come up and will not report any events. If
this happens, a Restart_group command must be executed to recover.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
275
PMC [ PMC-SIERRA, INC ]
