Mitel Sx 200 Ml Pabx Lightware 16 Instructions Guide

							Peripheral Equipment Troubleshooting Procedures 
3. 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 disconnects 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. 
4. When the system detects a trunk protocol failure, it removes the affected trunk circuit from 
service. Trunk protocol failures may indicate fault(s) with the trunk circuit, in which case the 
card should be tested and replaced. However, they may also indicate that the external trunk 
is faulty. In this case, the affected trunk circuit must stay out-of-sewice until the external 
equipment is repaired. 
SET FOR GROUND START 
SET FOR LOOP START 
e MARKED END 
SHOWN FOR 
LOOP START TRUNK LEDs 
1 -TRUNK 1 
&TRUNK 2 
&TRUNK 3 
&+-TRUNK 4 
&+.-TRUNK 5 
*;‘J; 
6 
cc0113 
March 1997 
Figure 3-l LS/GS Trunk Jumper Locations 
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							Troubleshooting 
Table 3-6 Trunk Voltage and Loop Current Readings 
Circuit 
E&M(Typel) 
LS/GS (Loop Start) 
LS/GS (Ground Start) 
DID 
Loop/Tie Idle Seized 
Tip to grid = 0 V Tip to grid = 0 V 
Ring to gnd = 0 V Ring to gnd = 0 V 
Tip to Ring = 0 V Tip to Ring = 0 V 
E lead = -48 V E lead = 0 V 
M lead = 0 V M lead = -48 V 
E to M lead = 48 V E to M lead = -48 V 
I loop = OmA I loop = OmA 
Tip to gnd = 0 V Tiptognd=-14Vto-22V 
Ring to gnd = -48 V Ring to gnd = -34 V to -26 ,V 
Tip to Ring = -48 V Tip to Ring = -4 V to -20 V 
I loop = OmA 
I loop = 1 OmA to 1 OOmA 
Tip to gnd = -48 V 
Tip to gnd = -14 V to -22 V 
Ring to gnd = -48 V Ring to gnd = -34 V to -26 V 
Tip to Ring = 0 V Tip to Ring = -4 V to -20 V 
I loop = OmA 
z I loop = IOmA to IOOmA 
Tip to gnd = -2 V Tip to gnd = -33 V to -44 V 
Ring to gnd = -48 V Ring to gnd = -17 V to -6 V 
Tip to Ring = -46 V TiptoRing=l6Vto38V 
I loop = OmA 
I loop = l2mA to 30mA 
Tip to gnd = -2 V Tiptognd=-17Vto-6V 
Ring to gnd = -48 V Ring to gnd = -33 v to -44 v 
Tip to Ring = -46 V Tip to Ring = -16 V to -38 V 
I loop = OmA I loop = 12mA to 30mA 
3-6 Issue 1 Revision 0 March 1997  
						

							Peripheral Equipment Troubleshooting Procedures 
MUSIC ON 
HOLD/PAGER 
MODULE RECEIVER/RELAY 
MODULE - SWITCH 
, 
E&M TRUNK 
on 
- 0 0 0 0 
UNIVERSAL CARD LED’s 
w MODULE 4 
-ALARM 
Figure 3-2 E&M Trunk Module With Universal Card 
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							Troubleshooting 
Supplemental E&M Trunk Card Troubleshooting Procedures 
Table 3-7 Supplemental E&M Trunk Troubleshooting Procedures 
Step Action Description / Follow-Up 
1. Perform General Trunk procedures in 
l Go to step 2. 
Table 3-5. 
2. Disconnect the affected circuits from the 
l GO to step 3. 
cross-connect field. 
3. IDLE STATE TEST - connect voltmeter be- * If not -48 V, replace E&M card, or E&M 
tween -48V and the M lead. Reading should module and/or Universal Card. Otherwise, 
be -48V (see Figure 3-3). go to step 4. 
4. INCOMING TEST - seize the trunk incoming 
l If not, replacecard/module; if fault persists, 
- connect butt-set to E lead and ground. Cir- possible control problem - go to step 1 I. 
cuit indicator should light when butt-set goes 
l Otherwise go to step 5. 
off-hook (see Figure 3-3). 
5. Check if incoming wink is programmed. 
Yes: . Go to step 6. 
No: 
l Go to step 7. 
6. Connect voltmeter to M lead and ground. 
l If not, replace card/module; if fault persists, 
Flash of -48V should be seen when butt-set possible control problem - go to step 11. 
goes off-hook (see Figure 3-3). 
l Otherwise go to step 7. 
7. Connect voltmeter to M lead and ground. 
l If not, replace card/module; if fault persists, 
Complete a call to an extension - when call possible control problem - go to step 11. 
is completed, steady -48V should be seen 
l Otherwise go to step 8. 
(see Figure 3-3). 
8. OUTGOING TEST - repeat step 3. 
l Go to step 9. 
9. Connect voltmeter to ground and the M lead. 
l Go to step 10. 
10. Connect butt-set to the E lead and ground, 
l If not, replacecard/module; if fault persists, 
and dial the access code for a trunk group. possible control problem - go to step 11. 
The reading should be a steady -48 V (see 
l Otherwise card is functioning. 
Figure 3-3). 
11. Possible control problem - refer to Supple- 
mentary Peripheral Equipment Procedures. 
Supplemental DID / Loop-lie Trunk Troubleshooting Procedures 
Table 3-8 Supplemental DID / Loop-Tie Trunk Troubleshooting Procedures 
Step Action Description / Follow-Up 
I. Petform General Trunk procedures in 
l Go to step 2. 
Table 3-5. 
Page 1 of 2 
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							Peripheral Equipment Troubleshooting Procedures 
Table 3-8 Supplemental DID / Loop-Tie Trunk TroubleshooGng Procedures (continued) 
Step Action Description / Follow-Up 
2. Disconnect the affected circuits from the 
l &I to Step 3. 
cross-connect field. 
3. 
4. 
5. 
6. 
7. 
8. Connect the butt-set across the Tip and Ring 
l If not, replace card; if fault persists, 
of the trunk circuit - the circuit indicator possible control problem - go to step 9. 
should light when the butt-set goes off-hook 
l Otherwise go to step 4. 
(see Figure 3-4). 
Check if circuit is a DID trunk. 
Yes: 
l Go to step 5. 
No: 
l Go to step 6. 
Use butt-set to simulate incoming digits - 
l If not, ensure extension/attendant 
connection should be made to an exten- console, etc. is functioning properly - 
sion/aHendant, etc., depending upon call replace card; if fault persists, possible 
routing. The trunk circuit indicator should control problem - go to step 9. 
wink following digits pulsed. 
l Otherwise go to step 7. 
TIE TRUNK - dialing, or going off-hook from 
l If not, ensure extension/attendant 
the butt-set should connect to an exten- console, etc. is functioning properly - 
sion/attendant, etc., depending upon call replace card; if fault persists, possible 
routing. control problem - go to step 9. 
l Otherwise go to step 7. 
Connect voltmeter across the Tip and Ring 
l To check wink start or answer back 
of the trunk circuit (see Figure 3-4). supervision, go to step 8. 
Check the results during a simulated incom- 
l When seized, meter should read -18 to -20 
ing call from the butt-set. v. 
l For a wink start, the meter should read a 
180 ms positive flash, and back to -18 to 
-20 v. 
l For answer back supervision, deflection to 
+18 to +20 V should be seen. 
l If these readings are not seen, retry. If this 
persists, replace the suspect card; if fault 
still persists, possible control problem - go 
to step 9. 
9. Replace card with a known working card. 
l If problem persists, reinstall the original 
card, and go to step 10. 
10. Refer to Peripheral Equipment Procedures. 
Page 2 of 2 
March 1997 
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							Troubleshooting 
PBXE&M CROSS-CONNECT 
FIELD TRANSMISSION /SIGNALING 
BUTT-SET 
Figure 3-3 E&M Type 1 Trunk Testing 
PBX DID/TIE 
TRUNK CIRCUIT 
CROSS-CONNECT 
FIELD 
- 
TO 
CENTWL 
OFFICE 
VOLTMETER 
BUT-SET 
cc0057 
3-10 
Figure 3-4 Loop Trunk Testing 
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March 1997  
						

							Peripheral Equipment Troubleshooting Procedures 
Tl Trunk 
The Tl Trunk Card provides an interface between the system and external digital trunk 
facilities. Each card contains one 24 channel interface. The Tl Trunk Card must be 
installed in a high power card slot. 
Table 3-9 Tl Trunk Card Troubleshooting Summary 
Step Possible Malfunction Source 
1. Faulty external equipment or far end. 
2. Tl card not installed in proper slot. Note: with two Tl Trunk Cards in a bay, they must be in 
slots 5 and 6 and require a dual Tl adapter. 
3. Faulty connections between the Tl Channel Service Unit and the cabinet end of the Tl 
Adapter Cable Assembly. 
4. Faulty connection between the Tl Adapter Cable Assembly and the Tl Adapter Card. 
5. Faulty connection between the Tl Adapter Card and the shelf backplane. 
6. Faulty CDE programming; likely forms: 
l Tl Link Descriptor 
l Tl Link Assignment 
l Tl Network Sync 
l COS Define 
l Trunk Circuit Descriptors 
l Non-Dial In Trunks 
l Dial in Trunks 
l Trunk Groups 
l Device Interconnection Table 
l System Configuration. 
7. 
Faulty Tl Channel Service Unit (see Note 2). 
8. 
Incorrect switch settings on Tl Trunk Card (see Note 3). 
9. 
Faulty Tl Trunk Card (see Note 2). 
10. Faulty Tl Clock on Main Control Card Il. 
11. Faulty Main Control Card Il. 
Note: 1. Useful maintenance commands: SHOW STATUS, TEST, SHOW ALARMS, SHOW ERRORS 
Tl-TRUNK 
- see the RS-232 Maintenance Terminal Practice. 
2. When the system detects a trunk protocol failure, it removes the affected trunk circuivchannel 
from service. Trunk protocol failures may indicate fault(s) with the trunk circuitichannel, in 
which case the card should be tested and replaced. However, they may also indicate that the 
external trunk is faulty. In this case, the affected trunk circuit/channel must stay out-of-service 
until the external equipment is repaired. 
3. The switch settings are for cable length (not loop length) between the Ti card and the Channel 
Service Unit. The correct settings are: 
0 to 149 ft: set Sl CLOSED; S2-S8 OPEN. 
150 to 449 ft: set S2, S3, S4 CLOSED; Sl, S5-S8 OPEN. 
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							Troubleshooting 
450 
to 655 ft; set S5, S6, S7 CLOSED; Sl-S4, S8 OPEN. 
These switch settings ail assume 22 gauge wire. 
Universal Card 
3.2 The Universal Card is used for several applications. Refer to procedures for the spe- 
cific application; i.e.: 
l DTMF Receivers / Relays 
l Music-on-Hold 
l Loudspeaker / Pager 
l E&M Trunks (see Trunk Cards - General). 
DTMF 
Receivers / Relay 
The DTMF Receiver module is installed on the Universal Card. The module can be 
used as a DTMF receiver (4 circuits) and/or a relay (2 circuits) - see the Engineering 
/r~formatjon Practice for further information. The following table outlines the most likely 
causes of DTMF failure. 
Table 3-l 0 DTMF Receiver / Relay Troubleshooting Summary 
Step Possible Malfunction Source 
1. 
Insufficient receiver circuits to handle peak traffic load (see Note 2). 
2. Faulty connection between the cross-connect field and the system or the cross-connect field 
and the external equipment (applies to the relays only - for Night Bell control or external 
System Alarm indication). See Note 4. 
3. Faulty external equipment (applies to the relays only-for Night Bell control or external System 
Alarm indication). See Note 4. 
4. Faulty CDE programming; likely forms: 
l System Configuration 
l Miscellaneous System Ports 
l Call Rerouting Table. 
5. Faulty or improperly installed DTMF Receiver module. 
6. Faulty Universal Card. 
7. 
Faulty Universal Card modules (see Note 3). 
t3. Faulty PCM cable connections between Bay Controller and Main Controller. 
9. Faulty switching matrices - refer to Supplementary Peripheral Equipment Procedures’. 
Note: 1. Useful maintenance commands: SHOW STATUS, TEST, SHOW ALARMS, SHOW ERRORS 
- see the RS-232 Maintenance Terminal Practice. 
2. Refer to the Engineering hformation Practice, for details on receiver provisioning. 
3. Receiver/ relay module malfunction could be caused by the failure of other module(s) on the 
Universal Card. 
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							Peripheral Equipment Troubleshooting Procedures 
4. A simple test for a relay circuit is: (a) disconnect the relay from external equipment at the 
cross-connect field; (b) connect ohmmeter across relay leads - an open circuit should be read 
when the relay is open. If not, there is a problem with the module. 
Music-on-Hold (MOH) 
The Music-on-Hold / Pager module interfaces the system to an external music source 
for MOH. The module is installed on the Universal Card. See the Engjneering 
/nfo~-/?Wiofl Practice for further information. The following table outlines the most likely 
causes of MOH failure. 
Table 3-11 Music-on-Hold Troubleshooting Summary 
Step Possible Malfunction Source 
1. Faulty music source. 
2. Faulty connection between the music source and the 
cross-connect field. 
3. Faulty connection between the cross-connect field and the system. 
4. Faulty CDE programming; likely forms: 
l System Configuration 
l Miscellaneous System Ports 
l COS Define 
l Call Rerouting Table. 
5. Faulty or improperly installed MOH / Pager module. 
6. Faulty Universal Card. 
7. 
Faulty Universal Card modules (see Note 2). 
%. Faulty PCM cable connections between Bay Controller and Main Controller (if applicable). 
9. Faulty switching matrices - refer to ‘Supplementary Peripheral Equipment Procedures’. 
Note: 
1. Useful maintenance commands: SHOW STATUS, TEST, SHOW ALARMS, SHOW ERRORS 
- see the RS-232 Maintenance Terminal Practice. 
2. MOH / Pager module malfunction could be caused by the failure of other module(s) on the 
Universal card. 
Pager 
The Music-on-Hold / Pager module interfaces the system to an external paging 
amplifier. The module is installed on the Universal Card. See the Engineering 
Worm&on Practice for further information. The following table outlines the most likely 
causes of paging failure. 
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							Troubleshooting 
Step Possible Malfunction Source 
I. 
2. 
3. 
4. 
!!I. 
6. 
7. 
8. 
9. 
3-14 Issue 1 Revision 0 March 1997  Table 3-12 Pager Troubleshooting Summary 
Faulty paging equipment. 
Faulty connection between the paging equipment and the cross-connect field. 
Faulty connection between the cross-connect field and the system. 
Faulty CDE programming; likely forms: 
l System Configuration 
l Miscellaneous System Ports 
l COS Define 
l Call Rerouting Table. 
Faulty or improperly installed MOH / Pager module. 
Faulty Universal Card. 
Faulty Universal Card modules (see Note 2). 
Faulty PCM cable connections between Bay Controller and Main Controller (if applicable). 
Faulty switching matrices - refer to Supplementary Peripheral Equipment Procedures’. 
Note: 
1. Useful maintenance commands: SHOW STATUS, TEST, SHOW ALARMS, SHOW ERRORS 
- see the US-232 Maintenance Terminal Practice. 
2. MOH / Pager module malfunction could be caused by the failure of other module(s) on the 
Universal Card.