Mitel SX-2000 EL, Information Manual

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Glossary of Terms
50003510 Revision A 237
Hunt Group
A hunt group is a group of stations to which incoming calls are directed by dialing a master
number. Two types of hunting are provided by the system, circular and terminal:
• Circular hunting starts at the extension after the last extension in the hunt group to which
a call was completed (the extension rung), and hunts overall extensions in the hunt group
in the sequence programmed. Hunting stops at the first idle extension found.
• Terminal hunting starts at the first extension in the hunt group and terminates at the first
idle extension found. Hunting takes place in the order in which the extensions were pro-
grammed into the hunt group.
Interconnection Restrictions
Certain interconnections between stations and trunks, and between trunk and trunk circuits,
are not allowed for various reasons. These interconnections are prevented by setting
appropriate parameters in the device interconnection table which is programmed as part of the
SX-200 EL/ML CDE procedures. Calls made with trunk circuits are subject to the parameters
in the table.
ISDN
The Integrated Services Digital Network (ISDN) accurately transmits voice, data, and video at
high speeds without a modem. The SX-200 system with LIGHTWARE 17 Release 4.0 or greater
software supports voice with 3.1 kHz audio.
Least Cost Routing
One of the functions of automatic route selection and refers to the economical aspects of the
ARS facility. In least cost routing, the trunk circuits are programmed with regard to the effects
of the costs of the possible alternative trunk routings. In practice the customer may require the
economical aspects to be subordinate to the overall traffic efficiency requirements of the
System. For example, less costly trunk routes may be available, but offer too low a traffic grade
of service for the customer’s needs. Actual requirements may be subject to traffic analysis of
the customer’s needs.
Link
A link is the system connection that contains 32 channels. Each channel is a digital "speech
path". In the SX-200 EL/ML system, there are three links per fibre connection or Bay (Node).
Therefore each peripheral node has the equvalent of 3 x 32 or 96 "speech paths" available.
Loop Start
A form of signaling used by a certain type of CO trunk which designates that type of trunk. It
denotes an outgoing trunk circuit which is seized by the system placing a loop condition on the
trunk.