Nortel Meridian Meridian 1, Planning, Installation And Operating Instructions

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Page 450 of 536 Chapter 25 — Fault locating and clearing
553-3121-210 Standard 3.0 January 1999
Table 58
Programs used in Midnight and Background Routines
Overlay Loader
This program locates, loads, and checks software programs. It automatically
activates the Midnight and Background Routines. You can load programs
manually by entering commands through the system terminal or maintenance
telephone. Once the program is loaded, you see the program mnemonic (such
as TRK for Trunk Diagnostic) on the system terminal.
Overload Monitor
The volume of system messages is continuously monitored by the system. If
too many error messages are detected from a line or trunk card, the system
activates the Overload Monitor program. The Overload Monitor disables the
faulty card and generates system messages with the mnemonic OVD.
Resident Trunk Diagnostic
This program automatically monitors all trunk calls and records apparent
faults on each trunk. If the number of faults on a trunk exceeds the threshold
for that trunk, the program generates a system message identifying the trunk
and the type of fault.
Program number Program function
LD 30 Network and Signaling Diagnostic
LD 34 Tone and Digit Switch and Digitone Receiver
LD 36 Trunk Diagnostic 1
LD 38 Conference Circuit Diagnostic
LD 40 Call Detail Recording Diagnostic
LD 41 Trunk Diagnostic 2
LD 43 (Midnight only) Data Dump
LD 44 Software Audit
LD 46 Multifrequency Sender Diagnostic
LD 60 (Midnight only) Digital Trunk Interface Diagnostic
LD 61 (Midnight only) Message Waiting Lamp
LD 135 Common Equipment Diagnostic
LD 137 Input/Output Diagnostic