S/UNI-IMA-4 Telecom Standard Product Data Sheet
Released
Register 0x20E: Group Timeout Register #1
Bit
Type
R/W
R/W
R/W
R/W
Function
Default
15:12
11:8
7:4
Group_startup_ack_timeout
Group_config_abort_timeout
RX_usable_timeout
0x4
0x4
0x4
0x4
3:0
RX_active_timeout
This register holds the time-out values used at different states of the group state machine or the
group-wide procedures (such as group start-up and LASR). The actual time represented by the
timeout value in this register can be obtained as:
Real_time = Timeout_value * Internal_timer_tick_interval
Also, note that actual timeout period may be one less than the specified timeout interval, due to
the asynchronous nature of events with respect to the timer. For example, if the interval is 0.25
ns, and the timeout_value is specified as 4, then the timeout will occur after 0.75 ns to 1.00 ns in
that state. To guarantee a timeout of at least 1 second, a value of 0x5 would have to be written.
Group_config_abort_timeout
The timeout value determines how long the GSM should stay in Config_Aborted state
before it can move back to Start-up state, if no new parameters are proposed by the FE and
PM does not issue a Restart_group command.
Group_startup_ack_timeout
The timeout value determines how long the GSM should stay in Start-up-Ack state before it
can move back to Start-up state, if the FE GSM is not in one of the following states: Start-
up-Ack, Insufficient-Links, Blocked, or Operational.
RX_usable_timeout
During the group start-up or LASR, this timeout value determines how long the RIPP
should wait before it can move any RX LSM’s to Usable state (unless all the RX links
involved are out of defect status). In the case of group start-up, the timer is started when the
GSM enters Insufficient-links state; during LASR, it is started when the PM issues add_link
command.
RX_active_timeout
During the group start-up or LASR, this timeout value determines how long the RIPP
should wait before it can move any RX LSM’s to Active state (unless all the links involved
are being reported TX = Usable by the FE). The timer is started after the RX = usable
synchronization point.
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2020889, Issue 2
183
PMC [ PMC-SIERRA, INC ]
