Test telephone DSTS2

The DSTS 2 first introduced in 1988 has remained a favourite with many telephone administrations around the world because of its reliability and ease of use.  Since its introduction,the design has evolved in line with changes in the technology and services deployed in the telephone network to its present form incorporating DSP technology.

Digital Services Protection (DSP)Test Telephones are 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.

F E AT U R E S

? Digital circuit safety

? Excessive voltage alarm

? Automatic lock-out

? No Battery Required

? Tone/pulse

? Last Number Redial

? High Impedance Monitor at normal listening levels

? High monitor level

? High impact resistance

? High chemical resistance

? Easy non slip shoulder placement

? Tone/Pulse operation

? Redial in Tone and Pulse

? Timed Break Recall (Flash)

? Polarity Check

? Ground Start/Earth Calling

? Full operation at 10mA

? Protection against direct battery connection

? Belt clip/hanging loop

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 (nominal).These 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.