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Oldcodger · 24th Apr 2021, 9:16 pm

op- one old test in the field for dial speed was to dial "0" let the dial return and say "one hundred one thousand and one". Of course as the dial should pulse at 10 pulses /second, it might be possible to time the dial ( stopwatch on phone) using the transmitter short contacts. ( one second)
To test the Virgin line for compatibility, you only need pick up handset /check for dial tone and tap the cradle . Dial tone should stop if line is LD.

24th Apr 2021, 9:16 pm	#13
Oldcodger Nonode Join Date: Oct 2014 Location: West Midlands, UK. Posts: 2,181	Re: GPO 300 and Virgin Media op- one old test in the field for dial speed was to dial "0" let the dial return and say "one hundred one thousand and one". Of course as the dial should pulse at 10 pulses /second, it might be possible to time the dial ( stopwatch on phone) using the transmitter short contacts. ( one second) To test the Virgin line for compatibility, you only need pick up handset /check for dial tone and tap the cradle . Dial tone should stop if line is LD.