Philips M550 Extended User Documentation page 35

Bad audio (crackles, echo, etc.)
•
The handset is nearly out of range. Move it
closer to the base station.
•
The phone receives interference from the
nearby electrical appliances. Move the base
station away from them.
•
The phone is at a location with thick walls.
Move the base away from them.
The handset does not ring.
Make sure the handset ringtone is turned on.
The caller ID does not display.
•
The service is not activated. Check with
your service provider.
•
The caller's information is withheld or
unavailable.
Note
•
If the above solutions do not help, disconnect the
power supply from both the handset and base station.
Try again after 1 minute.
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