[vpaulo]

Please add possibility to receive during active call the second call, which will come to same Extension number to the the second line of ip phone, registered with same extension number on 3cx systems.

[leejor]

If you change the option in the 3CX line settings to use the set for busy status then a second call can be placed to the same extension number. If the busy status is set by the PBX status then any second call to the same number already in use will not ring the second appearance (the PBX sees it as busy).