4 Restrictions
4.3
By Mobile OS Version
Please note that updates to lower battery consumption has been implemented on An-
droid OS from version 2.2. To reduce power consumption as much as possible, the
AMC has a configurable inactivation of the GPRS connection (refer to
12.5
) and it is
also capable of lowering the processor performance to improve battery life (refer to
12.7.16
. The AMC will then not continue sending registration requests when the phone
enters power saving mode - unless desired.
There are slight differences in the OS used by manufacturers (HTC, Samsung etc.).
Please note that this can lead to differences in the behavior of the AMC.
4.4
Details
•
Which possibilities exist to present Caller-ID information received by cellular chan-
nel are limited by the mobile platform as such.
•
The
Wi-Fi Sleep Policy
of the Android operating system (
System Settings » Wire-
less & Networks, Wi-Fi Settings
» Press "Options"»
Advanced
) has to be set to
"Never" for the AMC to work properly. Any other setting here will interfere with
main features of the AMC!
•
On some older devices and older OS versions the AMC cannot recognize the con-
nection of a headset. Headsets then have to be activated manually by using the
option Loudspeaker in-call menu of the AMC. Bluetooth headsets could interfere
with Wi-Fi systems, as both systems use 2.4 GHz frequency band contention can
be an issue. Each Wi-Fi transmitter blocks out 20 of the available 79 Bluetooth
channels. This is specifically valid for lower end Bluetooth headsets.
•
The establishment of a mobile-data connection when the AMC has been logged
off or is activated from sleep mode, can be perceived as slow. Until the AMC
is fully registered call setup time will be longer. With a non-Operator-Supported
SIM, the destination number will in this case be sent over DTMF.
•
The service
GSM Callback
is not available on Android.
•
Dialing numbers of contact entries from within the AMC with an appended letter
”P” and the like is not supported.
•
MWI is not supported when there is no data channel available. This feature will
not be available until the Android project makes it possible to reject a call from a
third-party application.
•
When performing a handover on some devices from cellular networks to Wi-Fi,
the device has removed from the ear for a short moment to prevent the built-in
proximity sensor from interrupting the handover and cutting off the audio stream
in Wi-Fi.
amc-3_android_ug_en_2012-10
11
