AASTRA 4187 Plus for BusinessPhone User Guide EN - Manual (Page 96)

Troubleshooting
BusinessPhone – Dialog 4187 Plus 96
Troubleshooting
This section contains information on how to solve common
operational problems. Go through the following steps if you
encounter any problems. If this does not solve the problem,
contact your system administrator. If others have similar problems,
there may be a system error.
Fault Check List
1. Make sure your telephone is connected to an analog line.
2. Read the Installation chapter.
To make sure that you have done everything correctly and that
everything is properly connected.
3. Disconnect all extra equipment.
If your telephone is working properly when done, the problem
lies in the extra equipment.
4. Connect a functioning telephone instead of the faulty
one.
If that telephone is working properly, the problem is probably in
your telephone, contact your system administrator.
5. Check for operational problems.
If operational problems are found, the problem is in the
telephone network, contact the local telephone service or the
local telephone company.