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Description: | Fullerphones were named after their inventor Captain A C Fuller of the Royal Engineers Signal Service, and were introduced in 1916, and replaced the instruments then in use. Their principal advantage was that they were difficult to 'tap' unless the enemy could gain direct access to the telephone line.Messages used by previous buzzing instruments 'bled' into ground and could be detected by suitable listening circuits some distance away.
This was the heaviest version of the Fullerphones. It had the capacity to send speech and morse code simultaneously on the same line thus allowing the operator to alternate between them if the reception was poor. | Publisher: | http://www.iwm.org.uk | Source: | Imperial War Museum | Identifier: | http://www.iwm.org.uk/collections/item/o... | Go to resource |
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