Configuration Guide

206 Glossary
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gatekeeper
A gatekeeper is server application on a network that tracks IP addresses of specified
devices to provide routing and (optionally) authorization for making and accepting calls
for those devices. The Business Communications Manager supports RadVision,
CSE 1000, and NetCentrex gatekeeper applications.
H.323
The ITU standard for multimedia communications over an IP network. Business
Communications Manager IP Telephony supports H.323.
hop count
This is the number of routers the signal must go through to reach the destination device.
The more hops that are required, the more potential there is for voice quality issues to
arise.
hot desking
See Feature *999.
hub
Center of a star topology network or cabling system.
IEEE802 ESS
This is the LAN and switch standard used to define the connection between the access
point and the NetVision handset onto the network. The handset is given the ID code of the
device(s) with this standard so the access points recognize them.
i2050 Software Phone
This is a computer-based version of an IP telephone. Once installed, it acts, and is
programmed, as you would the i2004 telephone. You must have a sound card and a USB
headset to use this application.
interoperability
Interoperability refers to how compatible Business Communications Manager data
configuration is with the rest of the network. Business Communications Manager IP
Telephony adheres to the ITU-T H.323v2 standards, and is compatible with any H.323v1
or H.323v2 endpoints.
This also refers to IP compatibility issues between released versions of the Business
Communications Manager. Business Communications Managers on the network with
earlier versions of the software will not have the same operability for VoIP trunks as
systems with 3.5 software.
IP server
On the Business Communications Manager, this is the server that registers IP telephones.