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...

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...

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 
March 1997 Issue 1 Revision 0 3-7  

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...

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...

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 
Issue 1 Revision 0 
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...

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)...

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...

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 /...