Lineman Test Set Blue Colour Telephone Button Phone Spring Loaded Belt Clip

This Lineman's Test Set is a new design to provide both DTMF and dial pulse output. The Lineman's Test Set features line-powered operation, so no extended power is required unless operating on low voltage or dry circuits. It is used by installers, repair technicians and other authorized personnel for line testing and temporary communications. Thepolarity LED provides immediate visual indication for Tip (+) and Ring (–) polarity.

Features
Three test modes
Talk / Ring / Monitor
Switchable tone or pulse dialling
High impedance monitor will not interrupt data, conversation or signalling
LED indicator for reversed polarity
Memory for 10 numbers to be stored
Last number redial31 digits maximum
Protection against over voltage
Transients ringer signals
Direct connection to most batteries and power supplies
Volume control
3-postition control for up to 12dBof gain
Spring loaded belt clip for easy carrying
Durable cloth covered cord equipped with securely anchored strain relief, modular RJ11X plug, and two five waytest clips
Water-resistant; extra protection against severe weather conditions
Space connector cord included
Specifications
Loop Limit 5k? max at 48VDC
(5k meter - 26Ga non loaded) nominal 15mA minimum loop current
DC Resistance 150? Typical at 80mA current
Monitor Impedence

Low impedance(Ring mode) -600? typical at 1kHz
High impedance (Monitor mode) 100k? typcial at 1kHz

Rotary Dial Output
Pulsing Rate:10 ± 0.5 pulses a second
Percent Break:60% ± 2%
Interdigital Pause:8.5ms Typical
Leakage During Break   >50k?
DTMF Output
Tone Frequency Error:± 1.5%
Level Of Tone Pair