Mitel SX-200 DIGITAL Pabx Engineering Information Manual

							Troubleshooting 
CHART 3-2 
OPS LINE CARD TROUBLESHOOTING PROCEDURES 
itep Action Description / Follow-up Remarks 
1 
Verify the problem. l Go to step 2. 
2 Disconnect the affected circuit(s) from the * Go to step 3. 
cross-connect field. 
3 Use a butt-set to check if the problem persists. Yes: o Go to step 4. 
No : * Problem lies outside the PBX. Check for 
problems with cabling and the telephone 
set. 
4 Log into the Maintenance Terminal. m Must enter username and password. See Note 
1 
5 Use SHOW STATUS command on the affected bay. o Go to step 6. 
6 If required, examine the maintenance log to obtain * Go to step 7. 
further information. (use LOGS READ command). 
7 Check if there appears to be problems with more Yes: 
Q Go to step 28. 
than one circuit. No : l Go to step a. 
8 Run a directed TEST on the affected circuit; check Fail: l Reseat the card and rerun the test. see Note 
test results returned to the terminal. l If failure persists, replace the card and 2 
rerun the test. 
l If failure stili persists, reinstall the 
original card, go back to step 5 and 
investigate further. 
e If programming problem is indicated, go 
to step 9. 
o Otherwise. go to step lg. 
-9 Check the programming for the station; including Yes: l Correct programming errors as required. see Note 
COS, COR, and pickup groups; any programming No: 
l GotosteplO. 3 
errors? 
10 Check that the associated line circuit LED lights No : 
* Replace the line card; if the problem 
when the set is taken off-hook. persists, reinstall the original card, and 
go to step 28. 
Yes: * Go to step 11. 
11 Go off-hook, and verify that dial tone is returned. Yes: l Go to step 17. 
No: 
l Gotostep12. 
12 Check if problem is intermittent. Yes: l Go to step 13. 
No: 
l Gotostep15. 
13 Ensure receivers are not busied out by Yes: @ Return receivers to service, or refer to 
maintenance or due to malfunctions; (use SHOW DTMF receiver troubleshooting 
STATUS command). Busied out? procedures as required. 
No : l Go to step 14. 
Page 3-6  
						

							Troubleshooting 
a CHART 3-2 (Cont’d) 
OPS LINE CARD TROUBLESHOOTING PROCEDURES 
itep Action 
14 Ensure sufficient receivers are provided to carry 
the peak traffic load. Enough receivers? 
15 Check if Side Tone is present. Description I Follow-up Remarks 
No : 
l Add receivers as required; if problem see Note 
persists, go to step 15. 4 
Yes: l Go to step 15. 
Yes: 
l Go to step 16. 
No : l Replace the line card and retest; if 
problem persists, go to step 28. 
16 Check if calls can be completed without dial tone. Yes: * Problem is with Main Control card. Go to 
step 28. 
No : 
o Replace the line card; if the problem 
persists, go to step 28. 
17 Dial one digit, and verify that Dial Tone is broken. Yes: l Go to step 20. 
No: *Gotostep18. 
18 Check if call can be completed over Dial Tone. Yes: l Problem is with Main Control card. Go to 
step 28. 
No: *Gotostep19. 
19 Problem lies in one of the following areas: l Check maintenance log for indications of 
*Main Control card 
problems in these areas. 
l Receiver module l Refer to the applicable troubleshooting 
procedures. 
20 Complete the dialing process and check that 
ringback tone is returned. Yes: l Go to step 22. 
No : * Problem in either the Main Control card 
or the line card. 
* Go to step 21. 
21 Replace the line card. l If problem persists, likely problem with 
Main Control card. Go to step 28. 
22 Set up a call to the suspect line and verify that Yes: l Go to step 25. 
ringing is received. No : l Go to step 23. 
23 Verify that ringing generator output is within spec * If not within spec, refer to bay power 
(90 VAC, 20 Hz). supply troubleshooting procedures; 
otherwise, go to step 24. 
24 Replace line card. l If problem persists, reinstall the original 
line card, and go to step 28. 
25 Answer call and verify that level and audio quality Yes: 
* Go to step 26. 
is acceptable. l Replace line card and retest. 
No : l If problem persists, reinstall the original 
line card, and go to step 28. 
Page 3-7  
						

							Troubleshooting 
CHART 3-2 (Cont’d) 
OPS LINE CARD TROUBLESH06TING PROCEDURES 
Action Description / Follow-up 
an overall view of the problem(s). l If there is a system CRITICAL ALARM 
condition, go see Note 1 of the Critical 
Alarm troubleshooting procedures in 
s a system MAJOR ALARM 
n, go to the Major Alarm 
hooting procedures in paragraph 
* Refer problem to Mite1 field service. 
l Problem fixed. 
Notes: 1. Refer to Section MITL9108-093-351-NA, RS-232 Maintenance Terminal for details of 
procedures. 
2. This is indicated by an error message returned to the terminal. 
3. Refer to Sections MITLS 108-093-210-NA, Customer Data Entry and 
‘.,_ 
fvllTL9108-093-105-NA, Features Description for details of procedures. 
4. Refer to Section MITL9108-093-180-NA, Engineering information for details on re- 
ceiver provisioning. 
Page 3-8  
						

							Troubleshooting 
COV/SUPERSETm Line Cards 
3.04 COV and SUPERSET@ Line cards connect the advanced feature 
SUPERSET 3TM and SUPERSET 4TM telephone sets to the 
SX-200’ DIGITAL PABX. The COV Line card (9109-020) is installed in 
the digital bays and provides capacity for up to six SUPERSET* sets. 
The SUPERSET Line card (9110-410) is installed in analog peripheral 
shelves, if present, and connects up to eight SUPERSET’ sets to the 
system. Chart 3-3 lists the steps involved in the troubleshooting of 
these card types. Further information concerning the characteristics, 
parameters and operation of the cards is contained in Sections MlTL 
911 O-096-200-NA and MITL9108-093-125-NA. 
Page 3-9  
						

							Troubleshooting 
CHART 3-3 
COV / SUPERSET LINE CARD TROUBLESHOOTING PROCEDURES 
tep 
Action Description / Follow-up 
1 Verify the problem. * Go to step 2. 
2 Disconnect the affected circuit(s) from the * Go to step 3. 
cross-connect field. 
3 Use a SUPERSET@ set at the MDF to check if the Yes: 0 Go to step 4. 
problem persists. No : l Problem lies outside the PBX. Check for 
problems with cabling and the telephone 
set. 
0 Refer to the applicable SUPERSET@ 
troubleshooting procedures. 
4 Log into the Maintenance Terminal. @ Must enter username and password. 
-.- 
5 Use SHOW STATUS command on the affected bay. 0 Go to step 6. 
6 If required, examine the maintenance log to obtain 0 Go to step 9. 
further information. (use LOGS READ command). 
7 Check if there appears to be problems with more Yes: * Go to step 29. 
than one circuit. No : 0 Go to step 6. 
6 Check if the affected circuit is of type 9109-020. Yes: 
l Go to step 12. 
No : * Go to step 9. 
9 Test all of the junctors (channels) in the affected l Use the TEST DEVICE TYPE command to 
bay. test each of 31 junctors. 
* Go to step IO. 
IO Do any of the junctors fail? Yes: l Go to step 11. 
No: eGotostep13. 
11 Unseat the suspect card, and run the test(s) on the Yes: 0 Replace faulty card. Problem fixed. 
failed junctor(s) again. Do they now pass? No : * Refer to Analog Junctors troubleshooting 
procedures. 
12 Run a directed TEST on the affected circuit; check 
test results returned to the terminal. Fail: 
Pass: * Reseat the card and rerun the test. 
* If failure persists, replace the card and 
rerun the test. 
0 If failure still persists, reinstall the 
original card, go back to step 5 and 
investigate further. 
l If programming problem is indicated, go 
to step 13. 
0 Go to step 13. 
13 Check the programming for the set; including COS, 
I I Yes: 0 Correct programming errors as required. 
COR, and pickup groups; any programming errors? No : 0 Go to step 14. 
Page 3-10  
						

							Troubleshooting 
CHART 3-3 (Cont’d) 
COV / SUPERSET LINE CARD TROUBLESHOOTING PROCEDURES 
tep 
Action Description / Follow-up Remarks 
14 Check that the associated line circuit LED lights No : l Replace the line card; if the problem 
when the set is taken off-hook. persists, reinstall the original card, and 
go to step 30. 
Yes: l Go to step 15. 
15 Go off-hook, and verify that dial tone is returned. Yes: 
l Gotostep21. 
No: l Gotostep16. 
16 Check if problem is intermittent. Yes: l Go to step 17. 
No: .Gotostep19. 
17 Ensure receivers are not busied out by Yes: b Return receivers to service, or refer to 
maintenance or due to malfunctions; (use SHOW DTMF receiver troubleshooting 
STATUS command). Busied out? procedures as required. 
No: aGotostepl8. 
18 Ensure sufficient receivers are provided to carry No : l Add receivers as required; if problem see Note 
the peak traffic load. Enough receivers? persists, go to step 19. 4 
Yes: l Go to step 19. 
19 Check if Side Tone is present. Yes: e Go to step 20. 
No : * Replace the line card and retest; if 
problem persists, go to step 30. 
20 Check if calls can be completed without dial tone. Yes: 0 Problem is with control card(s). Go to 
step 30. 
No : 0 Replace the line card; if the problem 
persists, go to step 30. 
21 Dial one digit, and verify that Dial Tone is broken. Yes: * Go to step 24. 
No : l Go to step 22. 
22 Check if call can be completed over Dial Tone. Yes: * Problem is with control card(s). Go to 
step 30. 
No : l Go to step 23. 
23 Problem lies in one of the following areas: 0 Check maintenance log for indications of 
*Main Control card problems in these areas. 
l Receiver module l Refer to the applicable troubleshooting 
procedures. 
24 Complete the dialing process and check that 
ringback tone is returned. 
25 Replace the line card. Yes: l Go to step 27. 
* Problem in either control card(s) or the 
fine card. 
No : * Go to step 25. 
Q If problem persists, likely problem with 
control card(s). Go to step 30. 
26 Set up a call to the suspect line and verify that 
ringing is received. 
27 Replace line card. Yes: * Go to step 29. 
No : 0 Go to step 27. 
0 If problem persists, reinstall the original 
line card, and go to step 30. 
Page 3-11  
						

							Troubleshooting 
CHART 3-3 (Cont’d) 
COV / SUPERSET LINE CARD TROUBLESHOOTING PROCEDURES 
)tep Action Description / Follow-up Remarks 
28 Answer call and verify that level and audio quality Yes: l Line circuit is functioning correctly - 
is acceptable. continue to monitor. 
No : l Replace line card and retest. 
* If problem persists, reinstall the original 
line card, suspect the set. 
29 Use SHOW ALARMS ALL ALL command to obtain l If there is a system CRITICAL ALARM 
an overall view of the problem(st. condition, go see Note 1 of the Critical 
Alarm troubleshooting procedures in 
paragraph 2.06. 
o If there is a system MAJOR ALARM 
condition, go to the Major Alarm 
troubleshooting procedures in paragraph 
2.07. 
l If there is a system MINOR ALARM 
condition, address each problem 
independently as if it were isolated - go 
back to step 8. 
STEP 30 SHOULD BE DONE DURING PERIODS OF LOW OR NO TRAFFIC, AS IT WILL HAVE AN ADVERSE 
PRESENT, THESE MAY BE RESET USING THE “MASTER RESET” PUSHBUTTON ON THE SCANNER CARD. 
a Go to step 32. 
on the maintenance panel/top panel. 
bay. Does fault persist? 
bay. Does fault persist? Yes: 0 Power down shelf; go to step 33. 
@ Problem fixed. 
8 Power down shelf; go to step 34. 
* Problem fixed. 
l Possible problem with Main Control card; 
go to step 35. 
@ Problem fixed. 
* Refer problem to Mite1 field service. 
card. Does the fault persist? * Problem fixed. 
I 
I 
Notes: 1. Refer to Section MITL9108-093-351-NA, RS-232 Maintenance Terminal for details of 
procedures. 
2. This is indicated by an error message returned to the terminal. 
3. Refer to Sections MITL9108-093-210-MA, Customer Data Entry and 
MITL9108-093-105-NA, Features Description for details of procedures. 
4. Refer to Section MiTL9108-093-180-NA, Engineering Information for details on re- 
ceiver provisioning. 
Page 3-12  
						

							Troubleshooting 
8. Trunk Cards 
3.05 
The procedures detailed in the following paragraphs cover the 
isolation and correction of the various trunk cards. Since the 
many different types of trunks share much common circuitry, the 
troubleshooting procedures have been generalized. Supplementary 
procedures are provided for specific trunk types (and specialized pro- 
cedures), where required. Chart 3-4 outlines the general troubleshoot- 
ing procedures for trunk cards. The trunk types covered are: 
l LWGS Trunk (9109-011) 
0 
CO Trunk (91 IO-01 1, 111, 211,311) 
l DID Trunk (9109-031) 
0 
DID/Tie Trunk (9110-031) 
a 
E&M Trunk (9018-013) 
l E&M Trunk (9110-013). 
--I Page 3-13  
						

							Troubleshooting 
CHART 3-4 
GENERAL TRUNK CARD TROUBLESHOOTING PROCEDURES 
step Action 
1 Verify the problem. 
2 Disconnect the affected circuit(s) from the 
_ cross-connect field. Description / Follow-up 
* Go to step 2. 
l Go to step 3. Remarks 
3 Use a butt-set to check if the problem persists. Yes: 
l Go to step 4. 
No : 
* Problem lies outside the PBX. Check for 
problems with cabling, Central Office, 
CDE programming for stations, etc. 
4 Log into the Maintenance Terminal. l Must enter username and password. See Note 
1 
5 Use SHOW STATUS command on the affected bay. l Go to step 6. 
6 If required, examine the maintenance log to obtain l Go to step 7. 
further information. (use LOGS READ command). 
9 Check if there appears to be problems with more Yes: 
0 Go to step 8. 
than one circuit. No : 8 Go to step 9. 
8 Check if problem is with all circuits on one card Yes: l Reseat the card and check again. If 
only. problem persists, replace card. 
No: l Go to step 40. 
9 Check if the affected circuit is in either Bay 1 or Yes: l Go to step 13. 
No: .GotosteplO. 
* Use the TEST DEVICE TYPE command to 
test each of 31 junctors. 
0 Go to step 11. 
Yes: l Go to step 12. 
No: 
l Gotostep15. 
* Replace faulty card. Problem fixed. 
* Refer to Analog Junctors troubleshooting 
* Go to step 23. 
No: aGotostep14. 
l Reseat the card and rerun the test. 
test results returned to the terminal. Pass: * If failure persists, replace the card and 
rerun the test. 
* If failure still persists, reinstall the 
original card, go back to step 5 and 
investigate further. 
Page 3-14  
						

							Troubleshooting 
CHART 3-4 (Cont’d) 
GENERAL TRUNK CARD TROUBLESHOOTING PROCEDURES 
tep Action Description / Follow-up Remarks 
15 Check the programming for the trunk circuit- Yes: l Correct programming errors as required. see Note 
including COS, COR, trunk descriptors, ARS data, No: 
l GotosteplEi. 2 
and trunk groups; programming errors? 
16 If the circuit is in an analog bay, ensure switch . Correct switch settings as required. 
settings are as specified in Section l If no problems, go to step 17. 
MITL9108-093-ZOO-NA. 
17 Check if fault is intermittent. Yes: e Go to step 18. 
No: 
l Gotostep19. 
18 Ensure that trunks are not affected by the CO Busy o If problem persists, go to step 19. see Note 
Hour congestion (usually occurs in late 3 
morning/early afternoon). 
19 Ensure that there are no Ground gffsets between * If there are, investigate; if not, go to step see Note 
the trunk circuits and the SX-200 DIGITAL PABX 20. 4 
system. 
20 Check if problem appears to be dropped calls or No : * Go to step 32. 
phantom incoming calls. Yes: * Go to step 21. 
21 Verify that the trunk programming does not * Go to step 22. 
recognize tip/ring reversals unless there is a 
special application. 
22 Verify that the disconnect timing allows for the l if problem persists, go to step 32. see Note 
possibility of periodic loop disconnects during call 5 
processing through a CO. 
23 Perform a directed test on the suspect circuit(s). 
24 Check for test failure. l Use the TEST command. see Note 
0 Go to step 24. 1 
Fail: l Reseat the card and the module, then 
rerun the test. 
l If failure persists, go to step 25. 
Pass: * Go to step 26. 
25 Check maintenance log for indications of problems Yes: l Refer to the applicable troubleshooting see Note 
with the Universal card, other modules on the procedures. 1 
Universal card, or the Main Control card. Any such No : l Go to step 26. 
indications? 
26 Use SHOW CONFIG on the card slot to identify any Yes: * Go to step 27. 
other modules on the Universal card. Other No : l Go back to step 15. 
modules? see Note 
1 
27 Perform directed tests on the other modules. Do Yes: * Replace faulty module(s) - if problem see Note 
these fail as well? persists, go to step 29. 6 
No : l Go to step 28. 
28 Replace suspect E & M module and test. Pass: l Problem fixed. 
Fail: l Possible problem with control card(s). 
l Go to step 41. 
Page 3-15