S/UNI-IMA-4 Telecom Standard Product Data Sheet
Released
Transmit Physical Link Context Table (MEM_SELECT=2)
Purpose: Contains state information and statistics for each TC Link or IMA Link. Each record
is addressed by either the TC tag from the IDCC or the physical link tag from the Transmit-LID-
to-Physical-Link mapping Table.
Usage: IMA Groups and TC Links.
Maintained by: TIMA and microprocessor.
Record Size: Two 32-bit words.
MEM_ADDR = (Physical Link Tag or TC Tag X 2) + Word Offset
Table 34 TIMA Physical Link Context Record
Word Bits
31
Parameter
unused
Description
unused
0
30:24 CTC Cell Count
Cell count from the last 2048 cell stuff on the CTC mode link
(if so configured). Each count represents 32 cells and is
used in conjunction with the M value in the ICP cell to
determine when 2048 cells have been transferred.
This field should be set to a count value of either 1 or 4
frames worth of cells (in units of 32) depending on the stuff
advertise mode used, 1 ahead or 4 ahead respectively, so
the initial stuff on the CTC mode link occurs after 2048 cells.
The following table gives possible initialization values:
Stuff Adv Mode
M
Initial CTC Cell Count
1
1
1
1
4
4
4
4
32
1
64
2
128
256
32
4
8
4
64
8
128
256
16
32
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2020889, Issue 2
243
PMC [ PMC-SIERRA, INC ]
