VTech SIP Contemporary Series User Manual page 26

Question
I hear other calls when using the telephone.
I hear noise on the cordless handset and the
keys do not work.
Common cure for electronic equipment.
Suggestions
• Disconnect the telephone base from the
network wall jack and connect a different
working SIP telephone. Check your SIP
server settings. If calls are still not clear,
the problem is probably in the wiring or
network server. Contact your telephone
service provider (charges may apply).
• Make sure the Cat-5 network cable is
plugged in correctly and securely.
• Unplug the Cat-5 network cable. Wait for
15 seconds before plugging it back in.
• If the telephone is not responding
normally, put the cordless handset in
the telephone base. If it does not fix the
problem, try the following (in the order
listed):
1. Disconnect the power to the telephone
base.
2. Disconnect the battery on the cordless
handset.
3. Wait a few minutes before connecting
power to the telephone base.
4. Install the battery again and then
place the cordless handset in the
telephone base.
5. Wait for the cordless handset to
synchronise with the telephone base.
Allow up to one minute for this to take
place.
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