The YeastarNeogate TG200 is a GSM Gateway that allows two-way communication between GSM and VoIP networks.The TG200 is the finest fallback solution for landline disruptions and is perfect for connecting IP Phones, soft switches, and IP-PBXs to GSM networks.

https://medium.com/@gsmgateway972/best-dinstar-32-port-gsm-gateway-device-provider-f79f11756d8e