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Internet Messaging Access Protocol. A remote mailbox access protocol. It enables efficient operation such as downloading only essential data by first acquisitioning the e-mail header prior to actual e-mail download. This feature makes the protocol well suited to remote environments.
International Mobile Station Equipment Identity. An identification number assigned to GSM mobile stations that uniquely identifies each one. It is a 15-digit serial number that contains a type approval code, final assembly code and serial number.
Internet Mode. A wireless service launched in Japan in spring 1999 by NTT DoCoMo. I-Mode was licensed to operators in Germany, France, Spain, Italy, the Netherlands, and Taiwan, where it operates over GPRS using WAP. I-mode delivers a huge range of services to subscribers and has proved enormously popular with some 30 million regular users. The revenue sharing model used for I-mode is being adopted by other operators as the basis for the new services enabled by GPRS and 3G.
International Mobile Station Identity. A unique 15 digit number assigned to a mobile station at the time of service subscription. It contains a mobile country code, a mobile network code, mobile subscriber identification number, and a national mobile subscriber identity.
The family of third generation technologies approved by the ITU. There are five members of the family: IMT-DS, a direct sequence WCDMA FDD solution; IMT-TC, a WCDMA FDD solution; IMT-MC, a multi-carrier solution developed from cdma2000; IMT-SC, a single carrier solution developed from IS-136/UWC-136; IMT-FT, a TDMA/TDD solution derived from DECT.
Intelligent Network.
Intelligent Network Application Part.
Instant messaging
Exchanging messages in real-time between two or more people logged on to an instant messaging service. Popular IM services include AOL's Instant Messenger (AIM), AOL's ICQ, Microsoft's MSN Messenger and Yahoo!
The common boundary between two associated systems.
A loose confederation of autonomous databases and networks. Originally developed for academic use, the Internet is now a glob al structure of millions of sites accessible by anyone.
A private network that utilizes the same techniques as the Internet but is accessible only by authorized users.
Internet Protocol a set of instructions defining how information is handled as it travels between systems across the Internet. Also Intellectual Property.
Intellectual Property Rights. Also known as patents, these are the rights of an inventor or assignee to develop and commercialize an invention and license it, usually for a fee, to other manufacturers.
A low earth orbit satellite communications system developed initially by Motorola.
Cellular standard known also as TDMA or D-AMPS.
Cellular standard also known as CDMAone.
Integrated Services Digital Network.
Internet Service Provider.
International telecommunications Union.
ITU Telecommunications Radio Sector.
ITU Telecommunications Standardization Sector.
The interface between the Node B and the RNC in a UMTS network.
The connection between the RNC and the circuit switched network in a GSM/GPRS, UMTS network.
The connection between the RNC and the packet switched network in a GSM/GPRS/UMTS network.
The interface between RNCs in a UMTS network.

The list of terms for mobile cellular communication is for our visitors. The Glossary is intended for educational purposes only.

While we have taken great care to insure that all terms are accurately defined, we assume no liability for mentions or omissions that may involve alternate descriptions.