The Telstra Ruggabutt is a testing telephone for use by installation, test and repair staff in the VF analague network.
Signalling DTMF/Dec switchable with 100 ms TLB (timed loop break) and 4 sec pause
Total of 13 memories, each of 16 digits (with last number redial)
LED line polarity indication
Metering Pulse Detector
High Impedance Monitor passive approx 10k ohms, output to the receiver. Active approx 10k ohms, output to the speaker
Impedance: On Hook - approximately 10k ohms, regardless of the position of the impedance switch. Off Hook ZC setting (normal setting) - complex impedance (TN12 network). Off Hook LO Setting - 700 ohms at 1kHz