1. What is a GoIP? GoIP is the short name for GSM Gateway of VoIP. It is intended to bridge VoIP calls to GSM and GSM calls to VoIP. It is similar to a FXO gateway except that it is using the GSM network instead of the traditional PSTN network.

2. What are the advantages of GoIP over FXO gateways? In principle, GoIP can achieve all the functions that an FXO gateway can do with additional values listed below. a)With GSM costs getting lower and lower in many countries, it make more sense to use GSM for call termination rather than traditional PSTN lines. With GSM, there are no expensive charges and long waiting period for installation/reallocation. b)You can change the phone and service provider by just changing the SIM card. c)Text messaging via GSM SMS is powerful for developing other applications. d)You can build your own telephone network easily.