S/UNI-IMA-4 Telecom Standard Product Data Sheet
Released
Word
Bit
23
Data Field
DIFF_DELAY_INT
Description
Differential Delay is out of bounds on link
addition/or recovery. This indicates the delay
on the link was out of bounds of the
programmed differential delay and that the
link failed to come up for this reason.
22
21
LODS_OVERRUN_INT
LODS, DCB overrun. An overrun condition
occurred. Note that this interrupt can only
be set after a link has been successfully
added to a group (and will not be set when a
link is rejected due to DIFF_DELAY_INT).
LODS_UNDERRUN_INT
LODS, DCB underrun. Indicates that the
DCB buffer experienced an underrun
condition and has disabled itself from
forwarding traffic to the ATM layer. An
underrun occurs when the transport delay
for the link is detected to be outside the
programmed limit and the transport delay is
smaller than the other links within the group
In general, this will happen only if the
transport delay of the link changes. An
underrun condition requires that the link
delay be revalidated prior to being placed
back in service.
If the device remains in the LIF state for a
long time (1 hour for E1, longer for T1), DCB
underrun may be detected by the device.
This occurs because stuff events cannot be
detected during LIF, and the internal
pointers may wrap-around.
Note that this interrupt can only be set after
a link has been successfully added to a
group (and will not be set when a link is
rejected due to DIFF_DELAY_INT).
20
19
LCD_INT
LIF_INT
A change of state of the LCD status bit was
detected.
A change of state of the LIF status bit was
detected.
This interrupt is automatically masked by the
device during a group-wide procedure that
includes this link, such as add_group,
Restart_group, and Start_LASR (for link
addition or link recovery).
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2020889, Issue 2
203
PMC [ PMC-SIERRA, INC ]
