Talk:Sound-powered telephone

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Phasing out?

I haven't been able to find anything about phasing out sound powered telephones or a system called IVACS. Can someone provide a reference? Rex07 02:59, 4 January 2007 (UTC)[reply]

Why would the Navy want to phase sound powered phones out? What could you possibly replace them with that doesn't need any external power to operate? JDZeff (talk) 07:33, 17 November 2021 (UTC)[reply]

Range

Need a reference for 30mi range. A brief web search shows ranges of around 4 miles. Rex07 03:56, 23 January 2007 (UTC)[reply]