AASTRA AMC 3 for Android EN - Manual (Page 27)

8 Features of the AMC
Muted Calls
Please note that a muted VoIP call may be unmuted when a handover from
VoIP to cellular networks is done. The AMC will display a warning message
if this occurs.
8.6.7 Handover to VoIP
It is also possible to trigger a manual Handover to VoIP if the Wi-Fi coverage is good
enough, as above the selection can be found in the AMC Main Menu.
8.6.8 Automatic Handover to VoIP
If Auto Handover has been enabled in the settings of the AMC, a handover from Wi-Fi
to Cellular will be performed automatically if the Wi-Fi signal strength gets too weak
to maintain a reliable VoIP connection. A handover from Cellular to Wi-Fi on the other
hand will be performed if a known network with sufficient quality gets into range during
an ongoing cellular call. At the availability of a network with sufficient quality, the AMC
will take some time to assure it is a stable connection before a handover is performed.
If an access point provides VoIP over 3G (and the AMC is set to use this), it will not be
possible to get back to a Wi-Fi access point during the call. This depends on that the
phone can only have one single IP address.
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