RELEASED
PM73123 AAL1GATOR-8
DATASHEET
PMC-2000097
ISSUE 2
8 LINK CES/DBCES AAL1 SAR
Field (Bits)
Description
T_CHAN_NO_SIG
(7)
Set to 1 to send cells with no signaling when in
SDF-MF mode. This is the same as using this
queue in SDF-FR mode, which means the structure
forms on frame boundaries instead of multiframe
boundaries.
T_CHAN_UNSTRUCT
(6)
Set to 1 only when sending cells with a single DS0
without a pointer in the SDF-FR mode. To conform
to the CES standard V 2.0 when using a single DS0
in SDF-FR mode, no pointer should be used. This
bit can be ignored for AAL0 mode.
BYTES_PER_CELL
(5:0)
A 6-bit integer specifying how many bytes per cell
are required if no structure pointers are used. For
UDF_HS mode, this value must be 47. This number
must be set so the cell generation rate per queue is
slower than once per frame. For unstructured lines,
this means between 33 and 47. For structured
applications, the BYTES_PER_CELL number must
exceed the number of DS0 channels allocated to
the queue. For example, a two channel queue may
have the number set from 3 to 47.
For SDF-MF connections with more than 16
channels allocated, the BYTES_PER_CELL
number must exceed the number of DS0 channels
allocated to the queue by two. For example, a 17
channel SDF-MF queue may have the number set
from 19 to 47.
For AAL0 connections this field should be set to 48.
This is due to the fact that there is no sequence
number byte in AAL0 cells.
For all available queues configured as single-DS0,
the minimum BYTES_PER_CELL is TBD.
T_CELL_CNT Word Format (07H)
Initialize to “0000” and at all other times the word is read only. The word is
maintained by TALP.
PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL
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PMC [ PMC-SIERRA, INC ]
