Avaya 11-300244 Manuel D’Utilisation

Page de 328
Telephony concepts
November 2004
Avaya Modular Messaging Concepts and 
Planning Guide
8-11
Hunt groups
A hunt group is a pre-programmed collection of extensions that is 
configured on the switch. A single pilot number presents a call to one of 
the available ports within the hunt group. Hunt groups can be designated 
for specific purposes, for example, incoming only or outgoing only. The 
simplest hunt groups are linear (available ports are hunted in sequential 
order). 
When planning for Avaya Modular Messaging, use hunt groups to 
balance the load on voice ports. This is important because multiple MAS 
units can be installed with multiple telephony cards. For more 
information, see 
 on page 13-12.
Types of hunt groups
Some common types of hunt groups are:
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Linear call distribution
Calls start at the first port. When the first port is busy with the 
first call, the next call goes to the second port. If the first port 
becomes free, the next call goes to the first port, and so on.
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Uniform call distribution (UCD)
Calls start at the first port. Subsequent calls go sequentially to the 
second, third, and fourth ports, and so on, regardless of whether 
earlier ports become available. The first port does not receive 
another call until all ports have taken a call. 
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Automatic call distribution (ACD)
Calls go to the port that has been idle the longest. For example, if 
the first port has been idle for 30 seconds, the second for 50 
seconds, and the third for 40 seconds, the first call goes to the 
second port.
Note: Avaya recommends ACD only with Digital Set 
Emulation integration using Nortel switches, and 
when support for more than 18 ports is required. 
Avaya does not recommend ACD with any other 
integration.
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Circular call distribution
In circular call distribution, the switch has the ability to 
remember the last busy port. When a call comes it goes to the last 
busy port. Subsequent calls go to the first port in the group and 
then sequentially go to the second, third, fourth ports, and so on.