Mitel SX-200 DIGITAL Pabx Engineering Information Manual

							Troubleshooting 
CHART 3-4 (Cont’d) 
GENERAL TRUNK CARD TROUBLESHOOTING PROCEDURES 
tep 
Action Description / Follow-up Remarks 
!9 Is one of the modules installed a Music On Hold Yes: 
l Go to step 30. 
(MOHVPager module? No 
: l Go to step 31. 
30 Remove the MOH/Pager module from the Universal Pass: * Fault was with MOH/Pager module. see Note 
card and retest. Problem fixed. 7 
Fail: 
l Go to step 31. 
31 Replace Universal card and retest. Pass: * Problem fixed. 
Fail: * Possible problem with Main Control card. 
l Go to step 41. 
32 If the circuit is an E & M trunk, go to the * Otherwise go to step 33. 
Supplementary E & M Trunk Troubleshooting 
Procedures (Chart 3-5). 
33 If the circuit is a DID or Loop/Tie trunk, go to the 
l Otherwise, go to step 34. 
Supplementary DID/Loop/Tie Trunk Troubleshooting 
Procedures (Chart 3-6). 
34 Check if Central Office trunk is loop start or o Ensure that CDE programming for the see Not 
ground start - see Appendix E for details. PBX trunk circuit agrees with results. If 2 
not, change programming and jumpers see Note 
for type 9109-011 cards, or change 8 
switch settings for type 94 10-01 I.-l 11, 
-211, and -311 cards. 
o If problem persists, go to step 35. 
35 Check if busy tone is returned after dialing a trunk Yes: 0 Go to step 36. 
access code. No : Q Go to step 37. 
36 Check for two loop start trunks connected Yes: o At least 1 of the trunks must have a see Nob 
together. forced release time-out period. This is 8 
switch controlled on analog trunks (see 
MITL91 OB-093-200-NA for details), and 
CDE controlled for digital trunks (see CDE 
Form 13, Trunk Circuit Descriptors - 
Disconnect Timer). 
No : e Go to step 37. 
37 Check Tip / Ring voltages, loop currents - refer to 
Table 3-l. 
38 Check the loop current of the circuit - refer to 
Appendix D. 
39 Check backplane(s) for problems. * If any of these are incorrect, replace the 
card; otherwise go to step 38. 
l If this is out of tolerance, replace the 
card; otherwise go to step 39. 
e If problem persists, possible control card 
problem - 
go to step 41. 
Page 3-16  
						

							Troubleshooting 
CHART 3-4 (Cont’d) 
GENERAL TRUNK CARD TROUBLESHOOTING PROCEDURES 
1 
;tep Action Description / Follow-up Remarks 
40 Use SHOW ALARMS ALL ALL command to obtain l If there is a system CRITICAL ALARM see Note 
an overall view of the problem(s). condition, go to the Critical Alarm 1 
troubleshooting procedures in paragraph 
2.06. 
0 If there is a system MAJOR ALARM 
condition, go to the Major Alarm 
troubleshooting procedures in paragraph 
2.07. 
* If there is a system MINOR ALARM 
condition, address each problem 
independently as if it were isolated - go 
back to step 5. 
STEP 41 SHOULD BE DONE DURING PERIODS OF LOW OR NO TRAFFIC, AS IT WILL HAVE AN ADVERSE 
EFFECT ON SYSTEM PERFORMANCE. BEFORE PROCEEDING, ATTEMPT A SYSTEM RESET, USING THE 
“SYSTEM RESET” PUSHBUTTON ON THE MAIN CONTROL CARD FRONT PANEL. IF ANALOG BAYS ARE 
PRESENT, THESE MAY BE RESET USING THE “MASTER RESET” PUSHBUTTON ON THE SCANNER CARD. 
CHECK IF THE RESET SOLVES THE PROBLEM. DO NOT PROCEED TO STEP 41 UNLESS SPECIFICALLY 
DIRECTED TO IT FROM A PREVIOUS STEP. 
41 Check if circuit is located in a digital bay. Yes: a Go to step 46. 
No : 8 Go to step 42. 
42 Power down the affected baY via the power switch * Go to step 43. 
on the maintenance panel/top panel. 
43 Replace the Digital Interface card; power up the Yes: o Power down shelf; go to step 44. 
bay. Does fault persist? No : * Problem fixed. 
44 Replace the Peripheral Control card; power up the Yes: 8 Power down shelf; go to step 45. 
bay. Does fault persist? No : * Problem fixed. 
45 Replace the Scanner card; power up the bay. Does Yes: * Possible problem with Main Control card; 
the fault persist? go to step 46. 
No : l Problem fixed. 
46 Power down the system; replace the Main Control Yes: * Refer problem to Mite1 field service. 
card. Does the fault persist? No : 8 Problem fixed. 
Notes: 1. Refer to Section MlTL9108-093-351-NA, RS-232 Maintenance Terminal for details of 
procedures. 
2. Refer to Sections MITL9108-093-105-NA, Features Description and 
MITL9108-093-2 1 0-NA, Customer Data Entry. 
3. Refer to Section MITL9108-093-180-NA, Engineering Information for details on provi- 
sioning. 
4. Refer to Section MITL9108-093-200-NA, Shipping, Receiving and Installation for details 
on system grounding. 
5. If periodic opens in loop current are experienced during call progression through .a 
central office, and disconnect timing has been set for a short interval, loop dis- 
connects may cause the trunk to drop. In such cases, the timing should be increased 
one step at a time, until the calls are no longer dropped. 
Page 3-1’7  
						

							Troubleshooting 
6. This step is necessary to ensure that other faulty modules are not preventing the E&M 
trunk module from functioning properly. 
7. This step is necessary because there are no MOH/Pager module diagnostics (since the 
MOH is always “on-line”, it cannot be taken “off-line” for testing). 
8. Refer to Section MITL9108-093-200-NA, Shipping, Receiving and Installation for details 
on trunk card switch settings. 
Page 3-18  
						

							Troubleshooting 
TABLE 3-1 
TRUNK VOLTAGE AND LOOP CURRENT MEASUREMENTS 
E and M Tip to gnd = OV 
Ring to gnd = OV 
Tip to Ring = OV 
E lead = -48V 
M lead = OV 
E to M lead = 48V Tip to gnd = OV 
Ring to gnd = OV 
Tip to Ring = OV 
E lead = OV 
M lead = -48V 
E to M lead = -48V 
Loop Start 
Ground Start 
Tip to gnd = -2V 
Ring to gnd = -48V = -17V to -6V 
Loop/Tie Tip to gnd = -2V 
Ring to gnd = -48V 
Tip to Ring = -46V = -17V to -6V 
Ring to gnd = -33V to -44V 
= -16V to -38V 
= 12mA to 30mA 
Page 3-19  
						

							Troubleshooting 
Supplementary E&M Trunk Troubleshooting Procedures 
3.06 E&M Trunks are provided for the SX-200@ DIGITAL PABX in two 
forms. The E&M Trunk module (9109-013) is installed on the 
Universal card in the digital bays. The module provides a single E&M 
circuit, which may be programmed as either 2-wire or 4-wire, as well 
as being conditioned via switches as Bell Standard E&M Types I or V. 
The E&M Trunk card (9110-013) is installed in the analog peripheral 
shelves (Bays 3, 4 and 5). This circuit card can also be set as either 
2-wire or 4-wire via switches, but can be conditioned only as Bell 
Standard E&M Type 1. The Supplementary Troubleshooting Procedures 
for this type of trunk are provided in Chart 3-5. Further information 
concerning the characteristics, parameters and operation of the mod- 
ule is contained in Section MlTL9108-093-I 25-NA. 
Page 3-20  
						

							Troubleshooting 
CHART 3-5 
SUPPLEMENTAL E&M TRUNK TROUBLESHOOTING PROCEDURES 
itep Action Description / Follow-up Remarks 
1 Perform General Trunk Troubleshooting Procedures l Go to step 2. 
in Chart 3-4. 
2 Disconnect the affected circuit(s) from the l Go to step 3. 
cross-connect field. 
3 IDLE STATE TEST- connect voltmeter between l If not -48VDC. repiace card; otherwise go see Fig 
-48VDC and the M lead. Reading should be to step 4. 3-l 
-48VDC. 
4 INCOMING TEST - seize the trunk incoming - l If not, replace card/module; if fault see Fig 
connect butt-set to E lead and ground. Circuit LED persists, possible control problem - go to 3-l 
should light when butt-set goes off-hook. step 11. 
* Otherwise go to step 5. 
5 Check if incoming wink is programmed. Yes: l Go to step 6. 
No : * Go to step 7. 
6 Connect voltmeter to M lead and ground. Flash of a If not, replace card/module; if fault 
-48VDC should be seen when butt-set goes persists, possible control problem - go to 
off-hook. step 11. 
* Otherwise go to step 7. see Fig 
3-l 
7 Connect voltmeter to M lead and ground. Complete e If not, replace card/module: if fault 
a call to an extension - when call is completed, persists, possible control problem - go to 
steady -48VDC should be seen. step 11. 
0 Otherwise go to step 8. 
8 OUTGOING TEST - repeat step 3. 0 Go’to step 9. 
9 Connect voltmeter to ground and the M lead. 0 Go to step 10. 
10 Connect butt-set to the E lead and ground, and e If not, replace card/module; if fault 
dial the access code for a trunk group. The reading persists, possible control card problem - 
should be a steady -48VDC. go to step 11. 
l Otherwise, circuit is functioning properly. see Fig 
3-l 
STEP 11 SHOULD BE DONE DURING PERIODS OF LOW OR NO TRAFFIC, AS IT WILL HAVE AN ADVERSE 
EFFECT ON SYSTEM PERFORMANCE. BEFORE PROCEEDING, ATTEMPT A SYSTEM RESET, USING THE 
“SYSTEM RESET” PUSHBUTTON ON THE MAIN CONTROL CARD FRONT PANEL. IF ANALOG BAYS ARE 
PRESENT, THESE MAY BE RESET USING THE “MASTER RESET” PUSHBUTTON ON THE SCANNER CARD. 
CHECK IF THE RESET SOLVES THE PROBLEM. DO NOT PROCEED TO STEP 11 UNLESS SPECIFICALLY 
DIRECTED TO IT FROM A PREVIOUS STEP. 
11 Check if circuit is located in Bays 1 or 2. Yes: l Go to step 16. 
No : l Go to step 12. 
Page 3-21  
						

							Troubleshooting 
CHART 3-5 (Cont’d) 
SUPPLEMENTAL E&M TRUNK TROUBLESHOOTING PROCEDURES 
Step Action Description / Follow-up Remarks  , 
12 Power down the affected bay via the power switch l Go to step 13. 
on the maintenance panel/top panel. 
13 Replace the Digital Interface card; power up the Yes: l Power down shelf; go to step 14. 
bay. Does fault persist? No : * Problem fixed. 
14 Replace the Peripheral Control card; power up the Yes: * Power down shelf; go to step 15. 
bay. Does fault persist? No : 0 Problem fixed. 
15 Replace the Scanner card; power up the bay. Does Yes: * Possible problem with Main Control card; 
the fault persist? go to step 16. 
No : 0 Problem fixed. 
16 Power down the system; replace the Main Control Yes: l Refer problem to Mite1 field service. 
card. Does the fault persist? No : * Problem fixed. 
Page 3-22  
						

							Troubleshooting 
Supplementary DID Trunk Troubleshooting Procedures a 
3.07 The DID Trunk (9109-031) card is installed in the digital bays of 
the SX-200@ DIGITAL PABX system. The card provides six trunk 
circuits. The DID/Tie Trunk (9110-031) is installed in analog peripheral 
shelves, if present, and provides two trunk circuits. The Supplementary 
Troubleshooting Procedures for these types of trunks are provided in 
Chart 3-6. Further information concerning the characteristics, param- 
eters and operation of the DID Trunk card is contained in Section 
MITL9108-093-125-NA. 
Page 3-23  
						

							Troubleshooting 
CHART 3-6 
SUPPLEMENTARY DID/LOOP/TIE TRUNK TROUBLESHOOTING PROCEDURES 
tep 
Action Description / Follow-up Remarks 
1 Perform General Trunk Troubleshooting Procedures l Go to step 2. 
in Chart 3-4. 
2 Disconnect the affected circuit(s) from the l Go to step 3. 
cross-connect field. 
3 Connect the butt-set across the Tip and Ring of 0 If not, replace the card; if problem 
the trunk circuit - the circuit LED should light persists, possible control problem - go to 
when the butt-set goes off-hook. step 9. 
0 Otherwise, go to’step 4. see Fig 
3-2 
4 Check if circuit is a DID trunk. Yes: 0 Go to step 5. 
No : * Go to step 6. 
a 
5 Use butt-set to simulate incoming digits - * If not, ensure extension/attendant console 
connection should be made to and extension/ is functional - replace suspect 
attendant, etc. The circuit LED should wink module/card; if fault persists, possible 
following digits pulsed. control problem - go to step 9. 
o Otherwise, go to step 7. 
6 TIE TRUNK - dialing, or going off-hook from the 8 If not, ensure connecting device is 
butt-set should connect to an extension, attendant functional - replace suspect card; if fault 
console, night bell, hunt group, etc., depending persists, possible control problem - go to 
upon the trunk’s programming. step 9. 
0 Otherwise, go to step 7. 
~7 Connect voltmeter across the Tip and Ring of the a To check wink start, or answer back see Fig 
trunk circuit. supervision, go to step 8. 3-2 
.-.8 Connect meter across Tip and Ring and check e When seized, meter should read -18 to see Fig 
results during a simulated incoming call from the -20VDC. 3-2 
butt-set. * For a wink start, the meter should read a 
180 ms positive flash, and back to 
-18 to -20 VDC. 
e For answer back supervision, deflection to 
918 to +20 VDC should be read. 
* If these readings are not read, retry. If 
this persists, replace the suspect card/ 
module; if fault still persists, possible 
control problem - go to step 9. 
Page 3-24  
						

							Troubleshooting 
CHART 3-6 (Cont’d) 
SUPPLEMENTARY DID/LOOP/TIE TRUNK TROUBLESHOOTING PROCEDURES 
:ep Action Description / Follow-up Remarks 
STEP 9 SHOULD BE DONE DURING PERIODS OF LOW OR NO TRAFFIC, AS IT WILL HAVE AN ADVERSE 
EFFECT ON SYSTEM PERFORMANCE. BEFORE PROCEEDING, ATTEMPT A SYSTEM RESET, USING THE 
“SYSTEM RESET” PUSHBUTTON ON THE MAIN CONTROL CARD FRONT PANEL. IF ANALOG BAYS ARE 
PRESENT, THESE MAY BE RESET USING THE “MASTER RESET” PUSHBUTTON ON THE SCANNER CARD. 
CHECK IF THE RESET SOLVES THE PROBLEM. DO NOT PROCEED TO STEP 9 UNLESS SPECIFICALLY 
DIRECTED TO IT FROM A PREVIOUS STEP. 
9 Check if circuit is located in a digital bay. Yes: 0 Go to step 14. 
No: 
l GotosteplO. 
. 
IO Power down the affected bay via the power switch * Go to step 11. 
on the maintenance panel/top panel. 
I1 Replace the Digital Interface card; power up the Yes: * Power down shelf; go to step 12. 
bay. Does fault persist? No : 
l Problem fixed. 
I2 Replace the Peripheral Control card; power up the Yes: 
l Power down shelf; go to step 13. 
bay. Does fault persist? No : * Problem fixed. 
13 Replace the Scanner card; power up the bay. Does Yes: 
l Possible problem with Main Control card; 
the fault persist? go to step 14. 
No : Problem fixed. 
14 Power down the system; replace the Main Control Yes: 
l Refer problem to Mite1 field service. 
card. Does the fault persist? No : l Problem fixed. 
Page 3-25