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Basic Troubleshooting and Repair
Troubleshooting Analog Trunks
If you cannot solve the problem using the following table, go through the
steps on page 240. If you still can’t find the problem, call Mitel Technical
Support.
Basic Troubleshooting
Table 49: Basic Analog Trunk Troubleshooting
Symptoms Probable Causes Corrective Action
Unable to make any external
calls or frequently unable to
access an external line
Service provider has
not connected line
Try the following:
• Unplug the cable that connects
the trunk to the LS trunk port on
the controller.
• Plug a standard analog phone
or test phone directly into the
service provider’s line jack.
• Listen for dial tone, Check each
line. If dial tone isn’t present on
all lines contact your service
provider.
Faulty wiring
between MDF and
controller
See Appendix D “System Cabling”
on page 365 for tip & ring
assignments.
Faulty programming Verify that the trunks are
programmed correctly. See
“Programming Analog Trunks” on
page 131.
Faulty Analog Main
Board or Analog
Option Board
Power down the controller.
Remove and replace the suspect
board. See