Mitel Sx 50 Dpabx Instructions Guide

							Code State 
01 Idle 
02 Waiting for a Receiver 
03 Signaling 
04 Busy 
05 Reorder 
06 Camped on 
07 Held 
08 Waiting for Answer 
09 Talk 
OA Message Waiting 
OB t Calling Back Substates 
14 Wait for line Select 
(SUPERSET Telephone) 
see Signaling SUBSTATES below 
15 Busy Override 
16 Swap/call Forward 
2E Auto-answer 
2B Wait for trunk Release 
2c Wait for connection 
2D Connected  Troubleshooting Procedures and General Maintenance Information 
350 5-16 Signaling Substates 
19 System Administration 
IA Console Functions 
IB Direct Trunk Select 
1c Hold W Voice Indication 
ID Call Hold Pickup 
IE Super Functions 
IF Waiting for DISA Access Code 
20 Behind PBX Special Substate 
21 Speed Call Set Up 
22 Manual Digits Into Speed Call Num 
23 Select Trunk Substate 
24 Add Held Trunk Signaling 
25 Wait for Dial Tone Detector 
26 Wait For%ial Tone 
27 Wait For Manual Dial Tone Indication 
28 Get Receiver 
29 Trunk Dialing 
2A Delay Dialing 
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							A.1 There are two methods for measuring loop current: 
1. In-line measurement 
2. Voltage conversion measurement. 
The in-line method is the most accurate. The voltage conversion method can be used 
where it is undesirable or not possible to break the loop. 
. Proceed as follows: 
1. Open either the Tip or Ring lead by removing one of the bridge clips at the MDF. 
2. Connect the ammeter leads where the bridge clip was removed, restoring the loop 
circuit. 
3. Read the current when dial tone is present and on a completed call. 
. This method is not as accurate as an in-line 
measurement. Proceed as follows: 
1. Connect a voltmeter across Tip and Ring. 
2. Read the voltage when dial tone is present and on a completed call. 
9 
3. Divide the voltage reading by 250 ( typical resistance seen between Tip and 
Ring under these conditions). 
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							Troubleshooting Procedures and General Maintenance Information 
350 A-2 
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							LOOP-START/GRO ND-START 
CHECK 
B.1 This test allows maintenance personnel to determine whether a trunk is a loop-start 
or ground-start circuit using only a Butt Set and a grounding lead. Proceed as 
follows: 
1. Locate the trunk circuit at the MDF 
2. Remove the bridge clips to disconnect the trunk from PABX. 
3. Connect the Butt Set across CO Tip and Ring. 
4. Go off-hook at the Butt Set. If dial tone is returned, CO trunk is loop-start. 
5. If no dial tone is returned, momentarily ground the Ring lead while remaining off- 
hook at the Butt Set. If dial tone is returned, CO trunk is ground-start. 
6. If there is still no dial tone, repeat the above step, but ground the Tip lead instead. If 
dial tone is returned, CO trunk is ground-start, but Tip and Ring are reversed. 
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							Troubleshooting Procedures and General Maintenance Information 
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							C.-l Any card or any other device found faulty must be returned with a Mite1 Repair Tag 
(see Figure C-l). The following information must be included on the repair tag: 
1. The date on which the device was returned. 
2. The location of the installation. 
3. The company name. 
4. The product name (e.g., SX-50). 
5. The system serial number. 
6. The software generic (e.g., -00-EO 1.4) 
7. The software revision (e.g., MS55-MRO-OO- 
8. The assembly part number of the item being returned. 
9. The assembly serial number of the item being returned. 
IO. Any pertinent alarm/error displays. 
Il. A brief description of the symptoms of the problem. 
I 
12. Indicate whether the fault occurred ring installation, or while the system was in 
service. 
13. Include on the back of the repair tag any further information that could be useful 
(e.g., location of system relative to other office equipment, recent power outages 
or storms). 
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							Troubleshooting Procedures and General Maintenance Information 
1. Date: 
2. Location: 
3. Company: 
5. System Serial No.: 
Revision: 
9. Alarm/Error Displsys: 
-- 
10. Trouble Symptom 
- 
- 
11. Failure Occurred A) During In5tsllalion 
S) In Service 
:: Further Details 
UTIORI: PLEASE ENSURE PCB ASSEMBLY IS 
RETURNED IN ANTISTATIC BAG. 
cc002 
mv. 
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