Is it supporting gsm modem ?

Can i install ICTBroadcast using a GSM modem instead of GSM Gateway?

Modems are not suitable for setting up our software . Gsm gateway or card that supports Asterisk is required as GSM Gateways use a SIM card and connect with a cellular tower. They convert the cellular connection to SIP and provide the connection as a trunk to a VoIP PBX. These gateways connect GSM networks to VoIP networks.