The wall mount SIP/IP intercom station with 1 to 4 buttons, TERRA-DS is door station featuring high quality handsfree conversation. It has contact inputs and outputs to remotely control external devices such as, electronic door lock, camera's and gates. Thanks to an optional casing, it is in full conformity with IP54 vandal-proof, waterproof and dustproof standards. The operating temperature range is -10 to 55 degree C. The TERRA-DS can be installed free from care in any public space or environment. TERRA-DS belongs to the TERRACOM range, the new ATEÏS Audio over IP solution.