Cisco Unified Communications Manager Express Hunt Group Mechanisms

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Peer configures hunting in a circular manner among the hunt group member DNs and starts with the DN to the right of the last DN to ring.

Longest-idle specify hunting on the DN which is idle for a longest period of time and the call will go to that DN of the hunt Group.

References: http://ccievoice.ksiazek.be/?p=690

Cisco Unified Communications Manager Express (CUCME) provides several mechanisms for call routing and distribution, one of which is hunt groups. Hunt groups are used to distribute incoming calls among a group of phones in a specific order or algorithm.

When configuring a hunt group, the administrator can specify the order in which phones should ring, and if the call is not answered, the hunt group can continue to the next phone in the list, based on the configured mechanism.

Two mechanisms for hunt groups in CUCME that keep track of the number of hops in call delivery decisions are:

1. Sequential: In sequential hunting, calls are distributed to the first available phone in the hunt group. If that phone is busy or does not answer, the call is redirected to the next phone in the list until the end of the list is reached. This mechanism keeps track of the number of hops by incrementing a counter for each phone that the call is redirected to. This counter is called the hop count. The administrator can configure a maximum hop count, after which the call will be sent to a specific destination, such as voicemail or another phone.

2. Longest Idle: In longest idle hunting, calls are distributed to the phone that has been idle for the longest time in the hunt group. If that phone is busy or does not answer, the call is redirected to the next phone in the list based on the same criteria until the end of the list is reached. This mechanism also keeps track of the number of hops in the same way as sequential hunting, by incrementing a hop count for each redirection.

The other hunt group mechanisms listed in the question, peer, parallel, overlay, and linear, do not keep track of the number of hops in call delivery decisions.

• Peer hunting distributes the call to a specific phone in the hunt group that is designated as the peer, regardless of its availability.
• Parallel hunting sends the call to all phones in the hunt group simultaneously.
• Overlay hunting allows the call to be forwarded to another extension or number, but does not consider the hop count.
• Linear hunting is similar to sequential hunting, but instead of cycling through the list, the hunt group stops at the last available phone.

In summary, the two hunt group mechanisms in CUCME that keep track of the number of hops in call delivery decisions are Sequential and Longest Idle.