Quote:
Originally Posted by Phil G4SPZ
'I was just interested in confirming that my phones were not faulty, which seems to be the case.'
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No, your 'phones aren't faulty.
It might be that there was some sort of signalling protocol established dependent on how they were set up. Many would be linked via a field-exchange using dolls-eye and magneto (hence the 'ring-off' clearing request on the label above the handle).
Perhaps buzzers were used for direct 'phone-phone' calling with strict instructions not to 'Buzz' during conversation? I notice the Soviets didn't fit buzzers to their TAI-43 telephones, and the type Fs were hardly suited to Morse signalling in the same way as the 'D', which actually had a little key rather than a button; I don't really know...