Philips VOIP8551B/05 Manual page 61

Note
When no message is playing, your phone
will hang up automatically if no key is
pressed for 8 seconds.
Remote access commands
Key Function
1 Repeat current or play previous
message
2 Play messages
3 Skip to next message
6 Delete current message
7 Switch answering machine on
(not available during playback)
8 Stop message playback
9 Switch answering machine off
(not available during playback)
58 The Answering Machine