| Term | Description |
Handoff | Handoff - The transfer of control of a cellular phone call in progress from one cell to another, without any discontinuity
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Hands-free | Hands-free - The operation of a cellular phone without using the handset; usually installed in vehicles.
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HCS | HCS - Hierarchical Cell Structure; the architecture of a multi-layered cellular network where subscribers are handed over from the macro to the micro to the pico layer depending on the current network capacity and the needs of the subscriber
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HDLC | HDLC - High level Data Link Control
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HIPERLAN | HIPERLAN - High Performance Radio Local Access Network; a wireless local area network being standardised by ETSI (Also HIPERLAN2)
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HLR | HLR - Home Location Register; the database within a GSM network which stores all the subscriber data. An important element in the roaming process
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HSCSD | HSCSD - High Speed Circuit Switched Data. An enhancement to GSM networks that enables data speeds to be boosted from 9.6 kbps in multiples up to 57.6 kbps.
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HSPSD | HSPSD - High Speed Packet Switched DataIub. The interface between the Node B and the RNC in a UMTS network
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