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Qty | Unit Price (Ex VAT) |
---|---|
1+ | £166.19 |
Re-reeling orders placed after 16:30 will be processed the next working day.
The Compact DSP Test Telephone is a Pocket Size Fully Featured Instrument suitable for use by anyone involved in the maintenance and installation of analogue telephone circuits.
The Compact DSP (Digital Services Protection) Test Telephone has been designed to operate safely in situations where telephone wiring may be carrying Digital traffic, Voltage feed to remote electronics or Hazardous voltages that result from fault conditions or misuse of the cable.
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 DC. Such voltages are normally present on circuits carrying digital services. If the circuit is active, the user can select MONITOR mode and listen to the sound to determine if the circuit is carrying digital services without disrupting the traffic.
Selecting TALK mode will stop the alarm signal and loop the line without damage to the test set. If the alarm signal persists, it indicates that the voltage on the line is above 120V (nominal). In this case the line is not looped, thus avoiding damage to the test set as well as alerting the user to the presence of voltages.
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