DigAlert 361 Telephone Test Set, Meter Pulse Detection

Tempo, 52059243, DigAlert 361 Telephone Test Set, ETSI 12KHZ Meter Pulse Detection, 90 ms TBR, Shrouded 4mm Plugs and Small Crocodile ClipsFeatures:Detection and Lockout of Data Services: T-1, E1, ISDN (BRI xDSL Filters and PRI), SW56, ADSL, HDSL, VDSLDigital circuit safetyVoltage alarm and Lock-outLoudspeaker listeningVolume controlMicrophone muteTalk/Monitor status LEDBattery low audible toneTone/ pulse dialingRedial (10x24 digit memories)Super Hi Impedance polaritySuper Hi Impedance monitorHigh monitor levelSelectable ringer tonesHigh impact resistanceHigh chemical resistanceReplaceable premium cordsetEasy shoulder placementUnique glass reinforced nylon quick release belt clipTempo's Nautilus range of extremely tough and weatherproof test telephones has been trusted by major global telephone companies since 1999. Built to withstand years of use literally "in the field", constructed from a super-tough polymer alloy and sealed with resilient and long life silicone seals. ETSI (European and associated markets) settings. Digital Services Protection - In the "on hook" mode, on connection to a circuit, the Test Telephone sounds an alarm to alert the user to the presence of voltages above 75V to 80V DC. Such voltages are normally present on circuits carrying digital services. If the circuit is active, the user can select the high impedance MONITOR mode and listen to the sound to determine if the circuit is carrying digital services without disrupting the traffic. This is present in all models and can be overridden if the extended voltage is expected. If the unit detects a voltage above 120 V DC, this sounds a different alarm and cannot be overridden as this is definitely not a POTS line.