We have a 3CX system that uses our Grandstream GXW4104 FXO gateway. We have 3 pots like connected leaving fxo#4 empty.
We want to be able to select a line when dialing, as to ensure the main line is available for customers calling in.
Attempted multiple registration but was unsuccessful. Can someone point me in the direction for this? 3 registrations for 3 fxo.
I saw there is a dial plan available, prefix + fxo# + phone number. Can someone elaborate on thus? Stage method is 1.
Also, we would like to force all outbound caller id to use our main trunk number irrespective of which fxo line was used to dial out. Can this be done?