1001 - MTP rcvd Transfer Controlled (TFC)

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

1. 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.
2. 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.
3. Contact the far-end to determine the reason for congestion.