*GMS modem frequency: 850/900/1800/1900 MHz
*Power supply voltage: 10-24V DC 300mA max
*Current used in standby mode: Up to 120mA
*Supported protocols: CONTACT ID, 4+2, Scancom, EGR100, Kronos, SIA IP
*Authorized users: 5
*Inputs: 3
*Outputs: 3
*Operating temperature range: -20...+55°C
*Generated phone line voltage: 18V
*Generated phone line impedance: 600 Ohm
*Dial tone of generated phone line: 425Hz
*Dimensions: 130x73mm