There have been transfer switches available since the dawn of Telephony,
( well, at least common Battery Telephony ) that will do just that.
Look around, ask a real telephone man, or use Google.
Or, use a simple DPDT relay run off any power source that fails when you
want to make the transfer.
John Novack
John covici wrote:
Hi. I have a client who wants some way that his analog phones can
call out even after the power is out and the UPS has died -- some way
that a phone can connect directly to an fxo or some such when power is
gone. Any hardware around which can do this? I have heard of some
ATA's which do this, do any of the channel banks have this capability?
Thanks.
--
Dog is my co-pilot
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