Programming instructions

217
Troubleshooting
Troubleshoot Phones and Peripherals
Phone Connection
If you can’t fix the problem using Table 28, call Mitel Technical Support
(see “Before You Contact Technical Support” on page 179).
Tip: Use the debug option on display IP phones to view
Version, Network, Telephony/DSP, Connection Browser Config, memory
Stats details (see page 170).
Table 28: Phone Connection Problems Troubleshooting
Symptoms
Probable
Causes
Corrective Action
Can't make calls
externally (display phone
may show call barred).
COR restricted. 1. Identify the numbers dialed by
the user, then check the route
used in ARS.
2. Remove the COR number from
COR group table in COR
assignment used in the route,
OR
Change the COR group number
in the route assignment form.
COS restricted
for PRI or QSIG
trunk.
Enable Public network access
via DPNSS in the set's COS.
Cannot make call over
analog loop trunk
(intermittent problem).
PBX is sending
the dialing digits
too fast for
Telco's receiver
on the LOOP
trunk.
Insert a tone plan in the digit
modification assignment for the
route used by analog loop trunk
(tone plan is used to insert one or
two seconds delay without any
tone detection).
If NONE of the sets are
responding.
Problem with
controller.
Perform a system check on the
controller.
Sets cannot receive DID
calls.
Non-DID is
enabled in
Station Service
Assignment
form.
Disable non-DID in the set's COS.
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