Mitel Sx 200 Ml Pabx Lightware 16 Instructions Guide

							Maintenance Log Messages 
Table 7-4 Main Control Reset Log Reports 
Reset Log Message 
Main Control was reset due to power up 
Main Control was reset due to pushbutton 
Main Control was reset due to watch dog timer 
Main Control was reset due to local bay cause 
Main Control was reset due to msg link failure 
Main Control was reset due to software error 
Process 00 ANYTHING at address 012345 
Main Control was reset due to software error 
Main Control was reset due to software error 
Process 00 has overflowed its stack 
Main Control was reset due to software error 
Exception = ANYTHING at address 012345 Action Required 
Information only. Main Control Card II is reset at 
power-up. 
The RESETpushbutton on the Main Control Card 
II was pushed. Investigate. 
In all cases, check if Main Control Card II is 
functioning; if not, go to Emergency 
Troubleshooting procedures. 
Table 7-5 Bay Reset Log Reports 
Reset Log Message 
Bay X was reset due to msg link failure 
Bay X reported cause: scanner/power 
Bay number X reported cause: parity failure 
at address XXXXXX 
Bay number X reported cause: power up Information only. Bay Control Card is reset at 
at address XXXXXX power-up. 
Bay number X reported cause: reset by MCC 
at address XXXXXX Bay was reset because Main Control Card II was 
reset. Investigate possible Main Control Card II 
problem. 
Bay number X reported cause: watchdog timer 
at address XXXXXX 
Bay number X reported cause: ** anything else** 
at address XXXXXX Action Required 
The main control was unable to communicate with 
the bay, and therefore reset the bay. Bay may 
have lost power; possibly faulty Scanner Card. 
Failure of on-board DRAM. If persistent, replace 
the Bay Control Card. 
Software failure. Check if Main Control Card II is 
functioning; if not, go to Emergency 
Troubleshooting procedures. 
Software failure. Check if Main Control Card II is 
functioning; if not, go to Emergency 
Troubleshooting procedures. 
March 1997 Issue 1 Revision 0 7-l 7  
						

							Troubleshooting 
Table 7-6 Miscellaneous Log Reports 
Reset Log Message Action Required 
System Configuration/System ID module 
conflict. Change system configuration to clear 
error. Check the installation of the System ID module. 
Check Form 4 option selection. 
Log(s) deleted by user A user logged in to the maintenance facility 
(maintenance terminal or console) deleted one or 
more log entries via the DELETE LOGS 
command. 
Involved in recovery is 01 04 04 04 ext 1100 
01 03 03 03 Trk 001 
Main Control trace back at address = XXXXXX 
(anything) 
CP Process recovered from software error # XX 
(anything) In all cases, this indicates a software error. Refer 
the problem to MITE1 Field Service. 
7-18 Issue 1 Revision 0 March 1997  
						

							8 Troubleshooting Aids 
Call Processing Information 
Table 8-l Digital Bay to Digital Bay Call 
Step Event 
1. Caller in Bay 1 goes Off-Hook (the event). 
2. The Bay Control Card (BCC) scans circuits on each card for events (hardware). 
3. When an event occurs, the BCC assembles a message (in HDLC format) describing the 
event, the associated PLID, and the device which caused the event. 
4. The message is then sent via a dedicated message channel to the Main Control Card II (MCC 
II). 
5. The message is picked up by the message system and routed to the appropriate destination; 
in this case, the Call Processor (CP) processes messages in a first in - first out manner. 
6. CP, taking the message from its message queue, then accepts the message and looks up 
the Device Work Area (DWA). This work area allows CP to determine the COS, COR, and 
other features enabled for the device which caused the event. 
7. CP checks for an available receiver and channel, and connects them to the device via the DX 
matrix. 
6. Once the Receiver is connected to the device, dial tone is sent from the Digital Signal Pro- 
cessor (DSP) on the MCC Il. This also must be connected to the device via the DX matrix. 
9. The caller then hears dial tone and begins dialing digits. 
10. For ONS calls only, the Receiver decodes the first digit and passes it to the MCC Il. For 
SUE~SE7telephones digits are sent to Call Processing (CP). 
Il. The MCC II accepts the digit and turns off dial tone from the DSP; it then waits for further 
digits. 
12. While waiting for and receiving the digits, the MCC II checks validity of digits dialed against 
database and against COS/COR limits for the device. 
13. Once all digits are accepted, the MCC II uses the information received to find the destination 
device and set up a channel to initiate the call. 
14. Assuming the destination is idle, the MCC II sends the ringing message to the BCC to ring 
the destination. The receiver is dropped during ringback. 
15. The BCC then instructs the Bay Power Supply (BPS) to send ringing voltage via the back- 
plane and dry contact relays on the line card to the destination. Ringing reference is supplied 
by the DSP and cadenced by the BCC for a specified pattern such as l second ON, 3 sec- 
onds OFF. SU/?EfEE~ telephones are sent a message to cause the set to begin warbling. 
16. While the destination is being rung, ringback tone is sent to the calling party. This is supplied 
by the DSP from the MCC Il. 
17. Destination hears ringing and goes OFF-HOOK. 
18. BCC detects off-hook while scanning all ports in its bay and sends the answer message to 
the MCC Il. 
Page 1 of 2 
March 1997 Issue 1 Revision 0 8-l  
						

							Troubleshooting 
Table 8-l Digital Bay to Digital Bay Call (continued) 
I I 
Step Event 
19. MCC II accepts the answer message, instructs the BCC to turn off the ringing being sent to 
the destination, turns off ringback tone being sent to the source, and then instructs the DX 
matrix to connect the source to the destination. 
This establishes the voice connection. 
20. Conversation is carried out and completed. 
21. One party hangs up. BCC detects and sends disconnect message to MCC Il. MCC II puts 
other party in ‘suspended - xxxx hung up’ or ‘lockout - locked out’ until he also hangs up. 
Then 
the MCC II returns the set to idle. 
Page 2 of 2 
Troubleshooting Kit 
The following is a recommended list of items required in the Field Service Engineering 
Troubleshooting Kit: 
. One of each circuit card as a spare,. including modules 
. Butt set 
. Digital multimeter 
. Moving coil multimeter 
. Static strap 
. Ground mat 
. Assorted screwdrivers, wrenches 
. Long nose pliers 
. Spare fuses 
. Wire strippers 
. Fan filter 
. Breakout Box (for Data). 
Loop Current Measurement 
There are two methods available to measure loop current: 
0 In-Line method 
l Voltage conversion measurement 
If it is not possible to break the loop (i.e., open the Tip or Ring lead) the second method 
may be used; however, it is not as accurate. 
In-Line Method. The procedure for the in-line method of measuring loop current is 
shown in Figure 8-l and is described as follows: 
I. 
Open either the Tip or Ring lead of the trunk facility by removing one of the bridge 
clips on the MDF. 
8-2 Issue 1 Revision 0 March 1997  
						

							TroubleshooGng Aids 
2. insert an ammeter where the clip was. 
3. Take current readings at the instant the trunk is seized, and after the call has been 
completed. Do this in both incoming and outgoing directions. 
4. Release the trunk and repeat the measurements several times on the same 
Central Office at peak and low traffic hours. 
5. Repeat the above steps using different Central Office trunks. 
Voltage Conversion Method. This method of loop current measurement should be 
used only in such instances when it is not desirable to open the Tip or Ring leads. The 
procedure is as follows: 
1. With the trunk seized, use a voltmeter to measure the voltage between the Tip 
and Ring of the trunk. 
2. This voltage is then used to calculate the loop current (see below). 
3. Release the trunk and repeat the measurement several times using the same 
Central Office trunk at peak and low traffic hours. 
4. Repeat the above measurements using different Central Office trunks. 
5. Typical equivalent resistance seen between Tip and Ring, when the trunk is 
seized, is approximately 250 ohms. 
6. The following is a simple calculation used to obtain the loop current value: 
Loop Current = measuredTiptoRingvoltage 
2 250 
MDF 
BRIDGE CLIP 
TRUNK 
TRUNK FACILITY 
Figure 8-l In-Line Current Measurement 
March 1997 Issue 1 Revision 0 B-3  
						

							Troubleshooting 
Loop Stat-t Versus Ground Start Check 
The loop start versus ground start check should be performed as follows (also refer to 
Figure 8-2): 
1. Locate the PBX trunk circuit Tip and Ring on the connecting block at the MDF. 
2. Remove the bridge clips on the Tip and Ring (i.e., disconnect the PBX trunk circuit 
from the Central Office Tip and Ring). 
3. Connect the butt set across the Central Office Tip and Ring. 
4. Go off-hook with the butt set. If Central Office dial tone is returned, then the Central 
Office trunk is loop start. 
5. If no dial tone is returned, then momentarily ground the Ring lead with a butt set 
off-hookacross Tip and Ring. If Central Office dial tone is returned, then the Central 
Office is ground start. 
6. If still no dial tone is returned, repeat the previous step and ground the Tip lead 
instead. If Central Office dial tone is returned, the Central Office trunk is ground 
start (however, the Tip and Ring are reversed). 
7. If still no dial tone is returned in either of these cases, there is a problem (perhaps 
Tip and Ring opened or shorted, or there is a large ground differential between 
PABX ground and Central Office ground.) Check PABX ground. If PABX ground 
is good, then report the problem to telephone company. 
Note: In most cases with ground start trunks, dial tone may be returned by grounding either Tip or 
Ring. If this should occur, repeat the 5th and 6th steps using the butt set in its “on-hook” or 
“monitor” state. Hold the ground lead on for a few seconds; CO should return dial tone as long 
as the ground lead is connected. 
CONNECTING BLOCK 
TO PABX 
TRUNK 
CIRCUIT 
BUTT SET v 
8-4 
Figure 8-2 Loop Start Versus Ground Start Check 
Issue 1 Revision 0 March 1997  
						

							Troubleshooting Aids 
March 1997 
NOTES 
Issue 1 Revision 0  
						

							Troubleshooting 
8-6 Issue 1 Revision 0 March 1997  
						

							SX-200@ ML PABX 
RS-232 
Maintenance 
Terminal 
TM, @I - Trademark of Mite1 Corporation. 
@ Copvriaht 1997. Mite1 Corporation. 
@ MITEL’  
						

							RS-232 Maintenance Terminal 
NOTICE 
The information contained in this document is believed to be accurate in all re- 
spects but is not warranted by Mite1 Corporation (MlTEL@). The information is 
subject to change without notice and should not be construed in any way as a 
commitment by Mite1 or any of its affiliates or subsidiaries. Mite1 and its affiliates 
and subsidiaries assume no responsibility for any errors or omissions in this doc- 
ument. Revisions of this document or new editions of it may be issued to incor- 
porate such changes. 
SX-200, SUPERSET, SUPERSET 3, SUPERSET 4, SUPERSET 3DN, SUPERSET 4DN, 
SUPERSET 401+, SUPERSET 410, SUPERSET 420, and SUPERSET 430 are trademarks 
or registered trademarks of Mite1 Corporation. 
VTIOOTM is a trademark of Digital Equipment Corp. 
Issue 1 Revision 0 March 1997