Following guide explains how to route the call directly to the defined extension number. The call on GSM side is answered after it was answered on VoIP side.

Example: All calls routed to extension 100 in VoIP.

Gateway configuration/GSM Group Assignment - put all modules in one Incoming group

Gateway configuration/GSM Incoming Groups - change following settings in Incoming group 1

The gateway is ready. Make a test call.

Note: If you want to dial a different number in VoIP for incoming call on each SIM then put GSM modules in more incoming groups and set other groups in the same way, only with  a different number in List of called numbers.

Note2: Add a new route in LCR if there is firmware 1.22 and higher