Circuit Switch Data (CSD) is the data communication standard on the GSM network. It also calls Data line or Fax line communication services over GSM network. CSD is using on the equipment data and M2M communication over the wireless network.

Our GSM modem FM-35i is the best solution for them. FM35i can perform the auto receiving call and CSD communication. The user can open the CSD data line communication SIM with the mobile operators and they can remote control and collect the data from the remote area.