Handsfree Telephone Communication Tester

TestPhone 850 - JSD TestPhone Ltd

The TestPhone 850 provides both handset and handsfree telephone communication. The product provides a standard Public Switched Telephone Networks (PSTN) interface, user interface and handset and/or handsfree vocal interface to allow the user to originate or answer standard PSTN calls on both Dual-tone Multi-frequency (DTMF - tone dialling) and Loop Disconnect (LD - pulse dialling) lines. In addition the product features on-hook audio line monitoring, PSTN line polarity indication, automatic on-hook/power-off and integral ADSL digital line filtering.