Contents

1   Overview

1.1   Description

Major type	193
Minor type	1586562564 1586562651
MO Class	N/A
Specific Problem	Link Out of Service (1586562564) Link Unavailable for UP (1586562651)
Severity	SEVERITY_MAJOR (1586562564) SEVERITY_WARNING (1586562651)

1.2   Prerequisites

1.2.1   Documents

Before starting this procedure, make sure that you have read the following documents:

• "Fault Management User Guide" (24/1553-APR 901 0315/2 Uen)
• "Configuring SS7, System Components" (7/1543-CNA 403 0874/1 Uen)

1.2.2   Tools

Not applicable.

1.2.3   Conditions

Not applicable.

2   Procedure

The link is automatically restarted by M3. This is a timer-controlled process and the link should come back into service.

Perform the following steps:

1. If the link does not come back into service automatically within two minutes, check cables, connections and SS7 boards.

   When working with plug-in units, use an ESD wrist strap to avoid ESD damage. Connect the free end of the strap cable to the ground connection point in the upper part of the cabinet. Remove ESD wrist strap when finished.

2. Check to see if there are any "Remote Processor Outage" alarms regarding the SS7 processor and solve those alarms.
3. Check in Signaling Manager to verify that the NMM process is up and running. In Signaling Manager clickToolsin the Menu bar, select Process View... to open Signaling Stack Process View dialogue box.

   If the NMM process is down, consult next level of maintenance support. Further actions are outside the scope of this Operating Instruction.

4. Check that adjacent node is working correctly by contacting the operator of adjacent node.
5. When the link is restarted by M3, and the backlog is cleared, the alarm is cleared.

   If the alarm does not cease, consult the next level of maintenance support. Further actions are outside the scope of this Operating Instruction.