Nortel SL-100 Product Manual page 153

To examine the problem in the Net subsystem, enter the Net maintenance
level by selecting Option 12 on the input position at the bottom of the
screen. Using the appropriate user interface and command menus, proceed
from menu level to menu level until the reference, location and status of the
defective network element are displayed. Problems occurring in any of the
other maintenance subsystems are handled similarly.
Maintenance subsystems
Table 16 "Descriptions of maintenance subsystems" (page 153)
the areas of responsibility covered by the various maintenance subsystems.
Table 16
Descriptions of maintenance subsystems
Subsystem header
CM
MS
IOD
Net
PM
CCS
Lns
Trks
Ext
Alarm system
The alarm system consists of hardware and software elements that monitor
key points in the system and audible or visual indicating devices. The
indicating devices respond to alarm inputs detected by the monitoring
elements.
Copyright © 2006, Nortel Networks
.
Description of maintenance subsystem
The Computing Module (CM) is the part of the core that performs the call
processing function.
The Message Switch (MS) subsystem monitors the Message Controller
(MC) and the message links to the Network Module and Input/Output
Controller (IOC).
The Input/Output Device (IOD) subsystem monitors the IOC, including
the device controller, the input/output devices and the recording devices.
The Network (Net) subsystem monitors the Network Module and the
speech links to the Peripheral Modules.
The Peripheral Module (PM) subsystem monitors all types of Peripheral
Modules up to, but not including, the line or trunk voice circuits.
The Common Channel Signaling (CCS) subsystem monitors the
independent signaling network for transmitting telephony messages
related to groups of speech circuits.
The Lines (Lns) subsystem monitors the Line Concentrating Module
(LCM) line circuits and the transmission facilities (lines) to the station sets.
The Trunks (Trks) subsystem monitors the Digital Trunk Controller
(DTC) DS-1 circuits and the transmission facilities over the DS-1 carrier
equipment and monitors service circuits for receivers, senders and
modems.
The External (Ext) subsystem monitors the alarm circuits of all outside
equipment connected to the Meridian SL-100 system. This subsystem
sends alarm indications to the visual display unit and to the alarm
hardware.
Communication Server 2100
Meridian SL-100 Product Guide
555-4001-103 20.01 Standard
SE09 20 October 2006
Maintenance and Administration Position 153
describes
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