Eusso 2 & 4 Port VoIP Gateway, User Manual

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ITG User’s Guide
3.4 Hunt Group
Instead of directly mapping a phone number to a destination, the ATPM first maps the phone
number to a group of destinations known as a Hunt Group. A hunt group is a group of
destinations that are equivalent.
For example, the customer support group of a company
might have 20 people who can handle support calls. Access to customer support is
through a single phone number but the next available support person is actually
connected upon each incoming call. These 20 phones would be configured as a hunt
group. A hunt group consists of a phone number and a list of destinations (members
of the group). When
an incoming phone number matches the phone number of the hunt
group, the ITG attempts to terminate the call at each of the destinations in the hunt group,
one at a time until a call is successfully completed.
Every destination that can be reached by dialing a phone number is a member of at least one
hunt group. When an address is presented to ATPM for lookup, the output is a hunt group ID
number. As a second step, the hunt group ID is presented to ATPM to get the list of
members. To effectively bypass the hunt group feature, simply make a unique hunt group for
each destination and one member in each hunt group.
3.5 Dial Plan
The dial plan is a database inside the ITG for the ATPM to map telephony numbers users
dialed to the IP address of remote ITGs. The dial plan consists of the destination table, hunt
group table and the address table. Users need to setup these tables, so that the ITG knows
how to setup calls with remote ITGs.
Address Table
The address table maps a phone number to a hunt group. The table contains entries that
specify the following information:
•
Telephone number
•
The hunt group the phone number maps to.
•
The minimum number of digits to collect before the ATPM starting address lookup.
•
The maximum number of digits the ATPM collects before it considers the dial string
is complete.
•
Number of digits forward to the destination.
Address table sample:
Address
Entry Hunt
Grp_Id
Min.
Digits
Max.
Digits
Prefix
strip
Prefix
Address
200 1 3 3 0 None
201 3 3 3 0 None
899 11 3 3 0 None
8 12 3 3 0 None
0 5 1 1 0 None
03 5 10 10 2 “0”
ITG Concepts
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