S/UNI-IMA-4 Telecom Standard Product Data Sheet
Released
Word Bits
Parameter
oif_cnt
Description
12:10
Count of the number of IMA frames while in the Out of IMA
Frame (OIF) anomaly. This value is compared against
gamma + 2 to detect the loss of an IMA frame (LIF) Gamma
is set in Register 0x308. Once the LIF condition has been
detected, this count is reset, and is used to count the
persistence of IMA Sync for 2 IMA frames.
9
last_cell_stuff
group_tag
Active high bit indicating when the last cell received on this
link was a stuff cell (required for proper IFSM processing).
8
Reserved.
Reserved.
7:2
1:0
The group tag associated with this link. The value is
initialized by PM; it is used by the cell write process to
retrieve the group read pointer, in order to detect overrun
conditions.
1
31
30
Reserved
Reserved
29
idleerr
Idle Cell Received during IMA status. This status is
maintained by the RDAT to report occurrences of idle cells
on IMA links to PM via the RIPP. This bit will be set when an
idle cell is detected on an IMA link, and will be cleared when
the RDAT message clear command is issued with the
idleerr_clear bit set (indicating that the RIPP has
acknowledged the problem).
28:26
25:23
Reserved.
stuff_cnt
Current link stuff count. This indicates the occurrence of the
next stuff event. When an ICP cell is received, this count is
set to the value in the link stuff indication in that cell. In the
event of an errored, invalid, or missing ICP cell, the count will
be automatically decremented (unless the count is 000 or
111). Note that an invalid stuff sequence will be interpreted
as an invalid ICP cell.
111
No imminent stuff event.
110-101 Reserved.
100
011
010
001
000
Stuff event in 4 ICP cell locations.
Stuff event in 3 ICP cell locations.
Stuff event in 2 ICP cell locations.
Stuff event in 1 ICP cell locations.
The next cell received on this link is a stuff event.
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2020889, Issue 2
221
PMC [ PMC-SIERRA, INC ]
