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Basic Troubleshooting and Repair
Cannot make call over
analog loop trunk
(intermittent problem).
System is sending
the dialing digits too
fast for Telco’s
receiver on the
LOOP trunk.
Insert a one or two second delay in
ARS: Modified Digit Table (Form
22) for the route used by analog
loop trunk.
No dial tone on set. Set is not
programmed.
In CDE, program the extension
accordingly.
Wrong wiring. Check the wiring between the
phone jack and the Peripheral
Cabinet, MDF, etc.
Faulty handset wire. Replace the handset cord.
Replace the handset.
Replace the set.
Circuit is manbusy. Use the Maintenance
DIAGNOSTICS > RET-TO-SVC
command
Circuit is locked out. Verify the wiring between the
phone and the patch panel.
If NONE of the sets are
responding.
Problem with
controller.
Check for the following:
- No alarms
- The program reboot is scheduled
- There are no error logs
- The database is backed up
Sets cannot receive DID
calls.
Non-DID is enabled
in Station Service
Assignment form.
Disable non-DID in the set’s COS.
Check for NMX fields in Form 15
for Valid entries.
Sets take 10-12 seconds to
receive incoming calls.
ANI/DNIS number
delivery trunk option
is enabled in T1
trunk’s COS.
Disable the ANI/DNIS number
delivery in the trunk’s COS.
Tip: You can assigned an unused
COS to verify if this is the problem.
Dialing digit conflict. Check the following forms for any
potential dialing conflict:
- Desktop Device Assignments
- Miscellaneous System Portst
- Feature Access Code
- ACD Agent Groups
IP to IP calls OK, but not IP to
TDM calls (rings once, then
call drops).
Problem with
controller.
Call Mitel Technical Support
Table 47: Phone Connection Problems Troubleshooting (continued)
Symptoms Probable Causes Corrective Action
(Page 2 of 3)