AMC+ 2.0 User Guide 4 Restrictions
4 Restrictions
Please note that there are certain restrictions for third-party applications on practically all mobile platforms. There are some restrictions on the Android devices which the AMC+ is subject to. New smart phone types/models are released every week. To avoid solution complexity and to ease management, it is recommended to implement a mobile phone policy in the company to standardize on a limited amount of phone models. A smart phone is like a computer. You have to reboot them now and then to ensure consistent behavior (the recommendation is once a day on average).
The AMC+ is a powerful application, and if you have all features turned on, the AMC+ as well as the data connections, battery life can in worst cases be 50% shorter (dependent on phone type, OS version, network and user scenarios).
There are a handful of destination numbers which are Emergency numbers (000, 110, 112, 118, 119,
911 and 999) which together with your mobile operator’s service numbers will result in pure cellular calls ("Direct calls") where the AMC+ should be inactive. Please make sure these are not part of your number plan.
4.1 By Mobile HardWare Platform
Samsung phones could need adaption of speech volume on the AMCC for Wi-Fi calls.
4.2 By Network (Cellular)
The functionality and features of the AMC+ are also subject to the used network . If no data connection is available, features requiring feedback (for example:checking the status for Call Forwarding) are not available! If Dual-mode usage is part of the solution, you must make sure the WiFi network is "Voice ready".
Most network operators deactivate the usage of data channels for cellular calls. This can be avoided by limiting data usage in cellular networks to WCDMA only. Please note that this setting limits data coverage, e.g. 2G networks, will not be used. No in-call menu will be displayed in 2G-networks.
Some mobile network operators do not send out their Identity in the signaling available for the AMC+ to present in a Network status bar. If this is the case only "Cellular Network" will be presented.
4.3 By Mobile OS Version
Please note that updates to lower battery consumption has been implemented on Android OS from version 2.2. To reduce power consumption as much as possible, the AMC+ has got a configurable inactivation of the GPRS connection (refer to
10.4
) and it is also capable of lowering the processor
performance to improve battery life (refer to
10.6.14
. The AMC+ will then not continue sending
registration requests when the phone enters power saving mode - unless desired.
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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 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 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 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 WiFi.
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