1. Virtual Signaling Transfer Point User Guide
  2. vSTP Features
  3. Time Division Multiplexing
  4. TDM Functionalities
  5. Remote Processor Outage Handling

2.9.5.4 Remote Processor Outage Handling

Remote processor outage (RPO) is a procedure where the processor outage status of the remote signaling point is communicated to the local signaling point.

Handling of RPO

In case of RPO, the following procedure is followed:
  1. A notification message is initiated by the RSP to MTP2 layer.
  2. After receiving the notification, the MTP2 layer stops sending data messages to remote point and sets the Link state to out of service. It send RPO indication to MTP3 layer.

  3. MTP3 layer receives the RPO notification and it starts the change over procedure. If MTP2 received PO recovered message, it send the indication to MTP3 Layer. Once RPO recovered message received at MTP3 Layer , it marks the link as available and initiate the change back procedure.

  4. When link comes in-service state, MTP2 starts data message transfer to remote end.