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A method and apparatus for routing a call to a dual mode mobile station (102) ... serve to further illustrate various embodiments and to explain various
According to insiders, China Mobile is also negotiating with many mobile phone manufacturers on dual-mode handsets with two GSM networks,
Posted by waqasahmad
There are three types of dual mode phones.
Network Compatibility
Mobile phones containing two types of cellular radios for voice and data. These phones include combination of GSM and CDMA technology. They can be used as a GSM or CDMA phone according to your preference. These handsets are also called global phones. A good example of this kind of phone is the Samsung SCH-a790.
These dual mode handsets are compatible with both GSM and CDMA networks and are essentially 2 phones in one device.
Such phones make sense in those countries that have both GSM & CDMA networks or international CDMA roamers who want to keep a single handset with 2 numbers on it.
All dual mode handsets require two identifying cards (one SIM and one RUIM) but not all dual SIM handsets are dual mode (for example dual SIM GSM phones).
Cellular and Non-cellular Radios:
Mobile phones containing both cellular and non-cellular radios used for voice and data communication. There are also 2 types of dual mode phones which use cellular radio which will contain GSM/CDMA/W-CDMA as well as other technology like IEEE 802.11 (Wi-Fi) radio or DECT (Digital Enhanced Cordless Telecommunications) radio. These phones can be used as cellular phones when connected to a wide area cellular network. When within range of a suitable WiFi or DECT network, the phone can be used as a WiFi/DECT phone for all communications purposes. This method of operation can reduce cost (for both the network operator and the subscriber), improve indoor coverage and increase data access speeds.
Wired Phones:
Wired phones with VoIP and POTS technology. These phones can be used for making VoIP calls and also used for phones on the circuit switchnetwork. These phones require compatible routers and modem to make VoIP calls.
Posted by HamidAliKhan
A dual-mode phone is a telephone which uses more than one technique for sending and receiving voice and data. This could be for wireless mobile phones or for wired phones.
Posted by HamidAliKhan
The IS-95 CDMA system offers the option of analog or dual mode operation.A mobile telephone(typically called a mobile station) contains a radio transceiver,user iinterface,abd abtebba assembly in one physical package. The radio transceiver converts audio to a radio frequency (RF)signal and RF signals into audio .A user interface provides the display and keypad which allow the subscriber to communicate commands to the transceiver. The antenna assembly couples RF energy between the electronics within the mobile telelphone and the outside "air" for transmission and reception. shows a block diagram of a dual mode mobile telephone that allows communication on either AMPS radio carriers or CDMA radio carriers.
Posted by nirvan
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