Use Extension Groups; Figure 75: Select Extension Group In Outbound Route - Grandstream Networks UCM6102 User Manual

USE EXTENSION GROUPS

Here is an example where the extension group can be used. Go to Web GUI->PBX->Basic/Call Routes-
>Outbound Routes and select "Enable Filter on Source Caller ID". Both single extensions and extension
groups will show up for users to select.

Figure 75: Select Extension Group in Outbound Route

Firmware Version 1.0.7.11 UCM6100 Series IP PBX User Manual Page 156 of 233