Compact DSP Digalert
Compact DSP Butt-in Telephone Test Set

The Compact DSP Test Set is designed to operate safely in situations where telephone wiring may be carrying digital traffic, voltage feed to remote electronics or the hazardous voltages that result from fault conditions or misuse of the cable.

When set to OFF mode, on connection to a circuit,the test set 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.

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 avoiding damage to the test set as well as alerting the user to the presence of voltages.

Features:

• Safe with Data Lines
• Rugged Drop-Proof Design
• Protected against 230 VAC
• Flat Battery - always ready feature
• Over Current Protection
• Battery Saving Auto Power-off
• Lightning Surge Protection
• Three-Position Volume Boost
• Finger Tip Microphone Mute
• Headset Socket for Hands Free
• 32-Digit Last Number Redial
• Acoustic Shock Protection
• High impedance monitor at normal listening levels
• Line polarity test
• Re-dial tone and pulse
• Variable ringer
• Digital services protection
• High voltage protection with alarm
• Long Line Operation: With a 48V feed > 5k loop, minimum current < 10mA
• DC Resistance: Off-hook: TALK modes (Handset & Headset): <300 On-hook: Idle: > 5M (10uA @ 48V DC) Monitor: > 5M (20uA @ 100V DC)
• Monitor Impedance: 100k @ 1kHz
• Dialing: Pulse Dial: 10pps, break 60% DTMF/Tone dail level: -3dBm typicalFlash/Timed Break
• Recall: 100mS (switchable 600mS, 300mS)
• Memory Dialing: 32 digit Last Number Redial
• PBX Pause: 2 seconds (can be chained and stored in memory)
• Alkaline Battery Life: 1 year normal use of 5 days continuous monitor of very loud signal
• Low Battery LED: Red LED indicates 2 hours of continuous monitor reminaing
• Auto Power Shut-off: 5 minutes after disconnection
• Environmental: Operating temp: -50C to =40 High resistance to impact
• Weatherproof: IP30