How to make a Ring Group signal extensions that are already busy with another call

1. Set the Extensions that are members of a Ring Group to receive multiple calls.

• From the 3CX Management Console, click on the Extensions node and enter the Extension configuration.
• Click on the ‘Forwarding Rules’ tab
• Scroll down in the ‘Available’ tab to the section called ‘Phone is Busy’
• Enable the option ‘I want to be able to accept more than 1 call at a time’
• Click on Apply, followed by OK.

Note: This change will enable the extension to receive internal and external multiple calls.

2. Configure the Ring Group functionality to signal extensions that are already busy with another call

• From the 3CX Management , click on the Settings node and then on the Advanced sub-node
• Click on the ‘Custom Parameters’ tab
• In the ‘Filter by Parameter Name’ type ‘allowuse’ (no quotes) and click on the ‘Search’ button
• One entry appear, with a value of ’0′. Change this to ’1′ (no quotes).
• Click on Apply followed by OK.

Additional Notes:

• The phone being used by the ring group members must be capable of multiple simultaneous calls.
• This article does NOT apply to Queues.
• You must restart all 3CX Services for these settings to take effect.