This feature is controlled in the ComPBX User Panel.
Once enabled, the Follow Me feature will direct calls to alternate extensions/external destinations (such as mobile or landline) should a call persist (ring) longer than the defined number of seconds.
At first, the system will ring the initial extension for the defined number of seconds (we recommend 15 seconds). Once the defined duration expires, the system directs the call to ring the extension(s) and/or external destinations listed as Follow Me numbers. The call can be accepted or rejected by an external device (such as a mobile phone) without the caller having knowledge of this. A rejection will ultimately send the call to the first (original) extension's busy voicemail*.
This feature ensures that a caller will never reach an external device's voicemail system. This is extremely beneficial because this ensures that follow me destination voicemails (such as a mobile user's personal voicemail) is never reached. Keep in mind that once a call is answered on an external device, it cannot be transferred back into the system (e.g. to an extension, ring group, call queue, etc.).
*The phone system is capable of routing the final (unanswered) call to many different destinations (such as voicemails, other extensions, IVR's, call queues, and more). This is an advanced feature of Follow Me.