It is working very well. Once the SIM is inserted and properly connected to the FXO port of the PABX or IP PBX you are done.
Your Visafone line or GSM (MTN,Airtel,GLO, ETISALAT) line can now be connected to your office intercom system through your PABX.

We have various voice solutions (analogue PABX, IP PBX, VOIP gateway and VPN)

We repair damaged PABX system to board level
We install PABX, IP PBX & VOIP system.

We rectify failed intercom system. We also integrate IP PBX with PABX system.
We have various GSM fixed line solutions that enables you to use your GSM lines and visafone line with your PABX / IP PBX for intercom solutions.