Mobile phones

Mobile phones

Industry: Mobile communications

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Mobile phones

Handoff

Mobile communications; Mobile phones

The process by which the Mobile Telephone Switching Office passes a cellular phone conversation from one radio frequency in one cell to another radio frequency in another. The handoff is performed so ...

Hands-free

Mobile communications; Mobile phones

An important safety feature that's included with most of today's mobile phones. It permits drivers to use their cellular phone without lifting or holding the hand-set to their ear.

Handset subsidy

Mobile communications; Mobile phones

Frequently, a wireless company will sell a phone (handset) below cost, with the hope of making up the loss later on customer usage fees. The amount of loss per handset is called the handset subsidy.

Hertz (hz)

Mobile communications; Mobile phones

A unit of measurement of one cycle per second when one radio wave passes one point in one second of time. Named in honour of Heinrich Hertz, the physicist who developed the theory of radio waves.

High-speed circuit switched data (HSCSD)

Mobile communications; Mobile phones

The final evolution of circuit switched data within the GSM environment. HSCSD enables the transmission of data over a GSM link at speeds of up to 57.6kbit/s. This is achieved by concatenating ...

Home location register (HLR)

Mobile communications; Mobile phones

A database residing in a local wireless network that contains service profiles and cheques the identity of a local subscriber.

I-mode

Mobile communications; Mobile phones

NTT DoCoMo's mobile Internet access, launched in February 1999. I-mode is an alternative to WAP, though it is only implemented in Japan. It offers Internet access and email service. While WAP uses ...