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Half-Duplex Transmission

Transmission in either direction but not both directions simultaneously.

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Hiper LAN

A wireless LAN protocol developed by ETSI (European Telecommunications Standards Institute) akin to 802.11. There are two types of Hiper LAN, both operating in the 5GHz band. Hiper LAN/1 provides data-rates up to 20 Mbps and Hiper LAN/2 data rates up to 54 Mbps.

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Host

Any computer on a network that is a repository for services available to other computers. It is common to have one host machine provide several services, such as SMTP (eMail) and HTTP (Web).

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Hosting/Hosted IP Telephony

This means that a reseller/supplier "host" all of the hardware infrastructure (I.e. Telephone PBX) in a secure central site and provide customers with access to this over a IP network. No hardware telephone system is required on the customer site.

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HTML

HyperText Markup Language

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Horizontal Cable

A cable connecting the floor distributor to the telecommunications outlet(s).