Mulogic DLM336DVR1 Standalone Dial-Up Serial Modem 12V-24Vdc internal power supply (9-36Vdc) or (100-240Vac with power adapter sold sepreratly). The MuLogic DLM-336 is a voiceband modem for reliable data communication over dial-up lines and 2-wire leased lines. The modem supports full and half duplex operation modes for data transmission. RJ-11 connector for telephone set(PSTN line at RJ-11 connector). Line impedance 600 Ohms,Transmit level: -9 .. -15 dBm,Receive threshold -43 dBm On,-48 dBm Off. The DLM-336 can also be used as a Class1 Fax modem for communication with group 3 fax machines. Although the DLM-336 is mainly intended for dail-up line applications,the modem can also be usOperating temperature of -13 F to 158 F.