Quote:
Originally Posted by G8BBZ
I don't recollect ever hearing of any coast station being equipped for ISB telephony - maybe others know more. The norm for passenger phone calls was VHF with the fitting of the "private deck" addition to the standard VHF ship-to-shore transceiver, which provided the additional frequencies and duplex capability to support phone calls. Most coast stations had the capability to link the VHF into the telephone network, I think. This facility obviously depended on being in VHF range of a coast station - once you were out of range then it was "Ship's Telegrams" which were the passenger's means of communication.
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The attached item from 1960 provides some background here. It mentions that four GPO coast stations were then being equipped to handle public radiotelephone calls to and from long-range ships. The equipment included Redifon receivers with ISB adaptors.
Cheers,