21516 Route Transmission on the MTP3 Prohibited

Description

The alarm is reported when the route transmission on the prohibited link are forbidden.

Attribute

Alarm ID	Alarm Severity	Alarm Type
21516	Major	Fault

Parameters

ID	Name	Meaning
1	Signaling Route Index	Record of a signaling route, which is automatically generated during the configuration
2	Net Indication	0=International,1=International Standby,2=National,3=National Standby
3	Dest Signaling Point Code	Code of the DSP in the signaling network, which is specified when configuring data of the signaling point
4	Adjacent Signaling Point Code	Code of a reachable DSP in the signaling network
5	Source Signaling Point Code	Code of the signaling point in the signaling network, which is specified when configuring data of the signaling point
6	Subrack No.	Logical subrack number of the XPUM CPU to which the signaling link belongs
7	Slot No.	Logical slot number of the GPUM CPU to which the signaling link belongs
8	CPU No.	Logical CPU number of the XPUM CPU to which the signaling link belongs
9	Alarm Attribute	0=Normal, Alarms period are longer than the Transient Threshold. 1=Transient Count, The times and the period of the alarms whose periods are shorter than the Transient Threshold are summed up. If the sum result is longer than the Alarm Occurrence Period Threshold or Alarm Occurrence Times Threshold, an alarm so called Transient Count Alarm is triggered. Because Transient Count Alarm is based on accumulative result, the recovery of the alarm may occur at least one Summing Cycle later. The Summing Cycle can be query by MML "LST STATSLDWIN".

Impact on the System

The adjacent signaling points cannot send the signaling information element to the DSP. If the local signaling point do not have other reachable DSPs, an alarm is generated indicating that the DSP is inaccessible.

System Actions

The STP at the local office sends the TFP message to other DSPs (except the signaling point that generates the message).
If the signaling point at the office is not of STP, the system initiates the status testing of the route where the destination signaling point passes the the STP.

Possible Causes

The adjacent STP sends the TFP message. The related signaling route are prohibited and there is no other available signaling route between the local office and the DSP.

Procedure

The alarm is generated because of a logical error in the signaling network. The error cannot be modified manually at the local office. Notify the adjacent STP (MSC) to rectify the error.