Mitel Sx 50 Dpabx Instructions Guide

Troubleshooting Procedures and General Maintenance Information 
Failure in read/writetest of 
non-volatile RAM. ar alarm. If alarm per- 
s, replace Generic Mod- 
Signal Processor failure. 
Replace Control Card. 
IO Trunk Condition. (No loop Open line. Check trunk by direct access 
current). Slow Central Office. from Attendant console. 
Incorrect programming of Check programming. 
loop/ground start. (See Ap- Try another trunk card. 
pendix B). 
Follow Table 4-5. 
Trunk card malfunction. 
11 Trunk...

Troubleshooting Procedures 
(continued) 
Automatic diagno 
error recurs, replace Trunk 
eport occurrence in 
value outside of allowed 9104-091-210-NA, Cus- 
r Data Entry (CDE), for 
data range. Correct 
mand at console. 
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Revision 0 
350 4-5  

r 
Troubleshooting Procedures and General Maintenance Information 
the set’s handset. 
has not discon- 
3 incorrect entries for Check security code. 
Page 3 of 3 
350 4-6 Revision 0 
9104-091-350-NA Issue 5  

Troubleshooting Procedures 
isconnect Timing should be increased one step 
at a time until calls no longer drop. (CMD 500 + equipment number 
eg. 2 field e = 0). Check Trunk Programming Loop/ 
Ground Start setting. CMD 500 + trunk number Reg. 2 field g O=loop 
between 23 mA and 65 mA. 
Test loop resistance. Resistance should not exceed serving CO’s 
\lo access. Check trunk programming, particularly loop/ground sta 
Cannot break dial tone 
(DTMF sets). Check for busi 
r dial tone should be set to...

Troubleshootina Procedures and General Maintenance Information 
Table 4-6 Station Troubleshooting 
(continued) 
Ensure that station’s COS is not 0. 
hook flash performed. .5 s max. (CMD 100 Reg. 6 field c = 1). Ensure, 
does not cause a problem when flashing while con- 
Table 4-7 
Failed. 
If an alarm is raised there is no dial 
350 4-8 Revision 0 9 I 04-09 l -350-NA Issue 5  

TROUBLESHOOTING AIDS 
5.1 This function connects the Attendant Console to the selected trunk. If the trunk is idle 
or busied-out, CO dial tone is received. If the trunk is in use, busy tone is received. 
The Alarm LED turns off, all stored alarm messages are erased and all busied-out 
equipment is restored to normal operation. 
ate: Attendant function 32 will not clear busy-outs if function 32 was performed within the 
preceding 60 seconds. If busy-outs do not clear in response to function 32, wait 60...

Troubleshooting Procedures and General Maintenance Information 
The system asks 3. Reply 1, 2, 3, 4 or 5. 
The system asks 
. Reply with equipment number. Trunk will 
k by Equipment Number command. The 
associated trunk status LED flashes slowly. 
The display shows Printing will not begin until the System Security Code 
(default 7772) has been entered. 
The display shows 
(default 7772) has 
the RS-232 port. Loading will not begin until the System Security Code 
. Data is loaded at a rate of up to 1200...

Troubleshooting Aids 
Table 5-1 nctions 
Slot Numbe; 
When the ‘RESET’ softkey is pressed, the Universal Card in the slot indicated is reset. 
This command has no effect on other card types. 
te: Key sequence ‘*4’ is equivalent to ‘RESET’ 
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Troubleshooting Procedures and General Maintenance Information 
5.2 The SX-50 system includes the following functions to allow maintenance personnel 
to examine the status of different parts of the system equipment. 
Inter-DX Link Status Display 
Station Status Display 
SUPERSET Status Display 
Trunk Status Display 
System Status Display shows the status of Dial tone detectors, the Tone Generator, 
DTMF Receivers and diagnostic tests. 
350 5-4 
Register 1 
Register Number 
I 
Status of DTMF Receivers 1 -...

Troubleshooting Aids 
Register 2 
’ 1  Register Number 
Status of Dial Tone Detectors 1 - 4 
0 = idle 
1 = busy 
2 = busied-out 
Status of Tone Generator 
0 = idle 
1 = busy 
2 = busied-out 
Register 3 
I 
Register Number 
T 
Current Diagnostic Test: 0: No test is running 
1: PROM checksums 
2: Volatile RAM test 
3: Non-volatile RAM checksums 
4: Scheduling diagnostics 
5: DX diagnostics 
6: Tone detector diagnostics 
7: Ton??generator diagnostics 
8: DTMF receiver diagnostics 
9: Tone detector...