Ejointech ACOM532-512 VoIP Gateway is a multi-functional and high-performance product that is designed with advanced embedded technology. It is a 32-port GSM VoIP Gateway that supports up to 512 SIM cards. It is mainly used for call termination (VoIP to Mobile) and origination (Mobile to VoIP). It can also be used as a Network SMS modem which supports SMS sending and receiving.