Add Analog Gateway for AX210 IP PBX Add Analog Gateway for AX210 IP PBX Docs and FAQ Add Analog Gateway for AX210 IP PBXAlthough AX IP PBX comes without any FXO or FXS port, we can integrate VOPTech VG series gateway to work with AX IP PBX. It is the best cost effective way for small business to have its own IP Phone system.