The system is generating traffic for a remote node that is congested. The distant node sent a transfer controlled (TFC) message in response.
Example RLGHNCXA21W 00-02-07 11:02:30 EST EAGLE 35.0.0
0100.1001 CARD 1201,A INFO MTP rcvd Transfer Controlled (TFC)
SIO=0a OPC=003-232-000 DPC=000-000-000
AFTPC=004-000-000 CONG STATUS=000
LSN=A1234567
Legend - AFTPC
- Affected point code (for SCCP messages)
- CONG STATUS
- Congestion status
- DPC
- Destination point code
- LSN
- Linkset name. The name must be unique.
- OPC
- Origination point code
- SIO
- Service information octet
Alarm Level: No alarm condition. The message is informational only.
Recovery
- The affected point code field of the output message identifies the node that is congested.
The system discards MSUs with a priority lower than the congestion status value sent with the TFC.
- The system sends only messages with a priority higher or equal to the congestion status value of the TFC.
Refer to TR-NPT-000246, Issue 2, June 1987, Chapter 1.111.5, Annex A for priority assignments.
- Contact the far-end to determine the reason for congestion.