GSM (Global System for Mobile) is the most widely-used cellular phone technology. Having begun mostly as a European standard, it has spread throughout the world to become ubiquitous. GSM was one of the first digital cellular systems, and as such, represented another level of magnitude in terms of complexity, with support for growth features such as GPRS (General Packet Radio Service), which pro...

Next-generation wireless networks will provide different wireless radio access technologies(RAT) like WiFi, WiMAX and GSM to mobile user. It provide seamless mobility with high speed connectivity. Like for phone calls user preffered UMTS and WiFi hotspot for web browsing. To enable connectivity during handoff, all the available networks need to known by mobile user. When multiple access network...

To search for a potential negative influence on the central nervous system (CNS) of the electromagnetic field emitted by a mobile phone, the authors performed a pilot experimental study of the influence of a single short acute exposure to the GSM mobile phone Motorola 8700, using visual evoked potentials (VEP) examination as an electrophysiological marker of CNS dysfunction. The study group con...

BACKGROUND The power level used by the mobile phone is one of the most important factors determining the intensity of the radiofrequency exposure during a call. Mobile phone calls made in areas where base stations are densely situated (normally urban areas) should theoretically on average use lower output power levels than mobile phone calls made in areas with larger distances between base stat...

This research aims in designing a method for implementing end-to-end voice encryption over mobile network such as GSM that independent to phone devices, operating system and network devices. The proposing method is an encryption system in domain frequency to keep the encryption signal remain within the range of sound frequencies that can be transmitted through GSM/2G/3G. This method differ comp...

Global System for Mobile (GSM) is a second generation cellular standard developed to cater voice services and data delivery using digital modulation. Short Message Service (SMS) is the text communication service component of mobile communication systems, using standardized communications protocols that allow the exchange of short text messages between mobile phone devices. SMS will play a very ...

background: the rapidly increasing use of mobile phones has led to public concerns about possible health effects of these popular communication devices. this study is an attempt to investigate the effects of radiofrequency (rf) radiation produced by gsm mobile phones on the insulin release in rats. methods: forty two female adult sprague dawley rats were randomly divided into 4 groups. group1 w...

The paper presents an application using a purpose-created web service that is consumed in a multi-channel environment. The service clients span over the common web interface, a JAVA-enabled GSM 2.5G mobile phone, and a Microsoft® Windows® application. The web service provides basic message passing functionality.

Several studies have been using a GSM mobile phone in stand-by mode as the source for exposure, and they claimed that this caused effects on for instance sleep and testicular function. In stand-by mode the phone is only active in periodic location updates, and this occurs with a frequency set by the net operator. Typical updates occur with 2-5 h in between, and between these updates the phone i...