Mitel SX-200 DIGITAL Pabx Engineering Information Manual

General Maintenance information 
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Figure 3-2 Maintenance Terminal Connection (Standard SX-200” DIGITAL Control Cabinet) 
Page 3-3  

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General Maintenance Information 
located in bay 2, slot 3, circuit 1. Refer to Section MITL9108-093- 
315-NA, Attendant Console information for information on console 
operation. 
3.07 Test Line Connectors. These connectors allow the mainte- 
nance person to access individual lines, trunks and receivers for 
testing purposes. The test line also has the capability of removing 
circuits from service, and accessing speech paths and the system 
printer. To facilitate operation of the test line, there must be...

General Maintenance information 
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Figure 3-5 Peripheral Cabinet Maintenance Panel 
Page 3-7/T  

General Maintenance Information 
4. ALARMS 
General 
4.01 Alarms are the means through which the SX-200@ DIGITAL 
PABX is able to determine its own functional state. The Alarm 
Manager software program monitors the performance of all peripheral 
devices in the system, and compiles up-to-date statistics on anoma- 
lies-The. level of alarm is determined by the actual or potential effect 
on service that the anomalies cause. 
Alarm Levels 
4.02 There are four distinct levels of alarm defined for the SX-200@...

Gen,eral Maintenance Information 
2. Systemd Alarms - These are the alarm levels of the 
categories on a systemwide basis. 
3. Overall Alarm. - This is the overall system alarm level, 
taking into account all of the bay 
alarms and system alarms in all cate- 
gories. 
Alarm Thresholds 
4.05 For each alarm category, the thresholds represent the alarm 
level trip points; the precise divisions between the alarm levels. 
The thresholds are simple percentages, indicating availability; the 
number of working...

General Maintenance Information 
5. THE MAINTENANCE MANAGER 
General 
5.01 The Maintenance Manager is the central maintenance software 
program in the SX-200@ DIGITAL PABX system software. Its 
responsibility includes the receiving of requests to run diagnostic 
tests, managing the test schedules (queues) and initiating testing. 
Diagnostic Test Queues 
5.02 Diagnostic tests are grouped into three different categories: 
Power-up, Background and Directed. To reflect this, the test 
schedules (queues) are...

General Maintenance Information 
Testing 
5.03 The Maintenance Manager controls the entire test sequence on 
any device under test. The general test sequence for any pe- 
ripheral device is as follows: 
1. The Maintenance Manager locates a device with diagnostic test 
requests pending on one of the test queues. 
2. The device is requested from Call Processing for testing. If the 
device is idle, the request will be granted. 
3. Any resources required to perform tests on the device are 
allocated. 
4. The...

General Maintenance Information 
Fault Recovery 
5.05 Once a device fails diagnostic testing, it is removed from active 
service; it can no longer be used by Call Processing. There are 
three different circumstances through which the device can be re- 
turned to active service. They are: 
1. The most common method should be through the trouble- 
shooting procedures outlined in Section MITL9108-093-350-NA, 
Troubleshooting. Thisentails repairing or replacing the affected 
card. When re-installed, the...