About Trunk Conditioning
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000 1/19/05I-5
Beta Draft Confidential
The above procedure can be used for ingress/downstream testing.
Unstructured Service With Full DS1
In unstructured case whenever any LOS occurs on ingress port, an AIS is generated in
the downstream direction. Any other alarms received in the ingress direction are
transmitted as is in the downstream direction. In the unstructured mode, no PPort or
LPort is brought down on occurrence of an AIS, random early discard (RED), or RAI
alarm. Only performance monitoring (PM) related parameters are updated. Similarly,
if an AIS is received in the upstream data from the ATM cloud, it is passed in the
upstream direction without any change.
If a buffer underflow situation arises because of a fault in the upstream ATM circuit
(PVC), the AIS pattern is transmitted upstream.
Table I-4. Example of Tx Trunk Conditioning Values in Upstream
Direction
Field Value Configuration Value
Tx Conditioning Data 0 to 0xFF 0xFF
Tx Conditioning Signal 0 to 0xF A
Tx Conditioning Mode 1 (None)
2 (Data and Signaling)
3 (Data)
4 (Signaling)
1 (None) default
Tx Force Conditioning Mode 1 (None)
2 (Data and Signaling)
3 (Data)
4 (Signaling)
2 (Data and Signaling)
default
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