The leading phone system manufacturers including Avaya, Siemens and Panasonic are now providing VoIP solutions that use a mix of PSTN, ISDN and VoIP technology.  There is also a growing trent towards SIP based PBX systems that increasingly rely on using SIP trunks for making calls.  Our range of VoIP GSM Gateways and SIP GSM Fixed Cellular Terminals cater for this need to communicate with GSM networks using the latest SIP trunk interfaces.

MV-370 VoIP GSM Gateway - Portech MV-370 Single SIM SIP GSM Gateway The MV370 is a single SIM fixed cellular terminal that connects to a VoIP PBX Telephone System as as SIP trunk (Suitable for use with Asterisk VoIP PBX). The Portech MV-370 VoIP GSM Gateway unit will allow calls from VoIP to GSM and GSM to VoIP and uses the SIP protocols so is ideal for use as a SIP Trunk on many SIP based VoIP PBX Phone Systems that want to take advantage of low cost calls to mobile phones.   More info	MV-372 VoIP GSM Gateway - Portech MV-372 Dual SIM SIP GSM Gateway The MV372 is a dual SIM fixed cellular terminal that connects to a VoIP PBX Telephone System as as SIP trunk (Suitable for use with Asterisk VoIP PBX). The Portech MV-372 VoIP GSM Gateway unit will allow calls from VoIP to GSM and GSM to VoIP and uses the SIP protocols so is ideal for use as a SIP Trunk on many SIP based VoIP PBX Phone Systems that want to take advantage of low cost calls to mobile phones.  Although the MV-372 unit will work with most SIP based PBX systems, we only support Asterisk based PBX, Xcelerator PBX and 3CX Windows based PBX.   More info
Telecom FM OneStream VoIP GSM Gateway - Dual SIM with FXS/FXO/SIP The Telecom FM OneStream SIP GSM Gateway unit will ideally be used as a SIP Trunk unit for any SIP based Voice Over IP Telephone System. The unit will use 2 SIM cards for 2 simultaneous calls.   More info