ACC Release Notes for the B.03.01 Release

31
Advanced Communications Controller Release Notes for the B.03.01 Release
Patches and Fixes for this Version
33. Reference: TPO0h01914
A request issued to a ZLU hangs and is
never processed. That is, it is queued in
the data structures but never sent to the
card.
The application is dynamically creating a
ZLU on a subchannel or port that has not
been defined or configured, but the driver
does not check for this condition and
rejects the request.
In this release, the driver has been
modified to reject any attempt to create a
ZLU (LTT or PTT) on a port and/or
subchannel that is not configured or
defined.
34. Reference: TPO0h01936
On a 4-channel cards, a DMA timeout
can occur when disabling LAP-D
devices.
When disabling LAP-D devices which are
under high message loads, the E1/T1
ACC card can “DMA timeout” due to
internal linkages between remaining
devices on the same subchannel being
corrupted. The firmware has been
corrected.
35. Reference: TPO0h01946
On 4-port E1/T1 cards, when the HDLC
ABM or X.25 protocol receives a REJ
frame while it is in the process of
retransmitting frames, it can get
transmitted frames out of sequence.
The firmware has been corrected.
36. Reference: TPO0h01974
On 8-port and 2-port cards, internal
queue corruption can occur with the
X.25 protocol on cable disconnect and
reconnect under high loads. The X.25
link can no longer manage calls
correctly once this has happened.
The level-2 LAP-B layer could mistakenly
leave frames on a transmit queue after
the link has gone down. These frames
then corrupt the processing after the link
is re-established. A second defect causes
the same symptom by allowing a level-3
flow-control packet to be transmitted
after the SABM/UA exchange, with an
incorrect sequence number.
The firmware has been corrected.
Symptoms Defect / Fix