Trunk Group settings reference#

This reference describes the fields available when creating or editing an inbound Trunk Group and the settings applied to its member trunks. For configuration steps, see Create a Trunk Group.

General#

Field

Availability

Description

Name

Required

Unique name used to identify the Trunk Group in the DIDWW User Panel.

Capacity Limit

Optional

Maximum number of simultaneous calls that DIDWW can deliver through the entire Trunk Group. Enter a value from 1 to 32767. The default value is Unlimited. Calls that exceed this limit are rejected.

Trunks

Optional

SIP and PSTN trunks included in the Trunk Group. A trunk can belong to only one Trunk Group. The default selection is empty.

Member trunk settings#

The following fields appear under Trunk Group when creating or editing an individual SIP or PSTN trunk. They control the trunk’s membership and routing behavior within the selected group.

Field

Availability

Description

Trunk Group

Optional

Group to which the trunk belongs. A trunk can belong to only one Trunk Group.

Priority

Trunk Group selected

Routing order. Lower values are preferred. Trunks with the same priority are selected according to Weight. Enter a value from 0 to 65535. The default value is 1.

Weight

Trunk Group selected

Relative selection weight among trunks with the same priority. Higher values increase the likelihood that a trunk is selected. Enter a value from 0 to 65535. The default value is 65535. See RFC 2782.

Re-routing Disconnect Codes

SIP trunk with a Trunk Group selected

Disconnect codes that cause DIDWW to attempt another eligible trunk in the group. By default, all codes are selected except 401 Unauthorized, 486 Busy Here, 503 Service Unavailable, and 603 Decline. The list also includes Ringing Timeout, which is selected by default and re-routes the call when the trunk’s Ringing Timeout expires. See SIP response codes in Call Logs.

The member trunk’s own Capacity Limit and Ringing Timeout can also affect whether an attempt proceeds to another eligible trunk. See the SIP trunk settings reference or PSTN trunk settings reference.