Tempo Communications COMPACT DSP Analog Test Tele

Affordable test phone with extensive features. The Compact DSP (Digital Service Protection) has been designed to ensure safe operation on lines where digital signals, network, remote power supply, or fault voltages may occur, which can be caused by defective or crossed cables. As soon as you connect the device to a line with a voltage greater than 75 V/DC (analog systems are powered with voltages from 24 V to 66 V), an alarm signal (digital voltage alarm) sounds. This indicates that the line is digital rather than analog. With the built-in monitor function, you can determine whether digital signals are superimposed on active lines without having to disconnect the line. The high voltage lock prevents the interconnection of lines with a DC supply of more than 110 V in speaking mode. DSP not only protects ISDN and dual line services from disturbances but also safeguards the testing device from damage that could result from consuming high power levels in speaking mode. All DSP functions operate even with a depleted battery.