1000 - MTP rcvd UPU - User Part is not SCCP

The system forwarded a unit data (UDT) message to a distant node that does not support SCCP. In response, the distant node sent back a user part unavailable (UPU) message.

The message provides the affected point code (which sent the UPU), as well as the service information octet (SIO) field of the message and the cause code.

All fields are in decimal values. The SIO field values applicable to this message are:

03 – SCCP

04 – Telephone User Part (TUP)

05 – ISDN User Part (ISUP)

06 – Data User Part (call and circuit related messages)

07 – Data User Part (facility registration and cancellation)

08 – MTP Testing User Part

The message also provides the value for the User Part that was unavailable (UPU=). The values shown above apply to this field as well.

The Cause Codes (Unavail Cause =) applicable to this message are:

000 – Unknown

001 – Unequipped Remote User

002 – Inaccessible User Part

Unequipped remote user indicates the distant node is not equipped for SCCP. Inaccessible user part indicates that the distant node is equipped with SCCP capability, but there has been a failure in SCCP making it impossible to handle messages sent to it by MTP.

Example

RLGHNCXA21W 00-02-07 11:02:30 EST  EAGLE 35.0.0   
0100.1000    CARD 1201,A  INFO   MTP rcvd UPU - user part is not SCCP
SIO=03   OPC=003-232-000  DPC=001-004-000                
AFTPC=004-000-001  UPU=03 UNAVAIL CAUSE=001                
LSN=A1234567

Alarm Level: No alarm condition. The message is informational only.

Recovery

No action necessary.