# Trunk Groups

## Purpose

The Trunk Groups form is used to gather outgoing trunks into groups for the Automatic Route Selection forms. Use this form when performing the following tasks:

- Program Automatic Route Selection

NOTE: Trunk groups are not supported on the EX platform. The ESM form Trunk Groups is not available in the System Administration tool for the EX platform. There are no physical channels programmed for any digital or analog trunks on the EX platform.

## Field Descriptions

Parameter | Description | Default Value
Trunk Group Number | A number up to three digits in length which is used in the ARS Routes form. | Blank
Hunt Mode | Either "Terminal" for terminal hunting or "Circular" for circular hunting. Voice mail trunks in a hunt group must be programmed for "Circular" hunting. NOTE: To optimize CPU usage, Mitel recommends Circular hunting for large or high traffic trunk groups. | Terminal
Trunk Group Busy RAD | The directory number from the ONS/OPS Circuit Descriptors form corresponding to the Trunk Group Busy RAD. The MITEL Call Distribution feature must be installed in order to program the Trunk Group Busy RAD. | Blank
Maximum Network Hop | The number of hops from 1 to 26 that a DPNSS call will be permitted between systems. This field may not be programmed for routes involving analog trunks. | Blank
Comments | A meaningful name (up to 15 characters) to describe the Trunk Group created. | Blank
Member | System-generated, protected field. Indicates the number of members in the trunk group. |
Trunk Number | The Trunk Number of each trunk to be included in the Trunk Group. Trunk Numbers are assigned to trunks in the Analog Trunks and Digital Trunks form. List the trunks in the order in which hunting is to take place. Trunks may appear in more than one trunk group. DID trunks and E&M Trunks used as pagers are not allowed in trunk groups. The maximum number of trunks per trunk group must not exceed the "Trunks per Group" of 175. | Blank