AASTRA AMC+ User guide for Android EN - Manual (Page 10)

AMC+ 2.0 User Guide 4 Restrictions
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 channel are limited
by the mobile platform as such.
• The Wi-Fi Sleep Policy of the Android operating system (System Settings » Wireless & 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 connection 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 WiFi transmitter blocks out 20 of the
available 79 Bluetooth channels. This is specifically valid for lower end Bluetooth headsets.
• The AMC+ on Android does not presently support Instant Messaging & Presence.
• The establishment of a mobile-data connection when the AMC+ has been logged off or is acti-
vated 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 from the AMC+ Contacts with a character like "p" inserted after the destination number
and before post-dial keys is not supported, as the AMC+ has no way of knowing when to send
the keys.
• 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 a HTC device from cellular networks to WiFi, the device has re-
moved 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 WiFi.
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