Butt-in
telephone lineman's handset used for line test.
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product
Public Switch Telephone Network Tester
295B
The Testphone 295B is a test telephone designed for use on Public Switched Telephone Networks (PSTN). It is designed for use on both Dual-tone Multi-frequency (DTMF - tone dialling) and Loop Disconnect (LD - pulse dialling) lines. Fitted with an integral ADSL filter, the telephone will not cause interference when connected to ADSL/Broadband lines in either `on hook` or `off hook` mode.
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product
Handsfree Telephone Communication Tester
TestPhone 850
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.
