In article ,
Jethro wrote:

Do all of your corded phones plug into your house electrical system?

As I tried to say - no. Two phones are 'corded'. That is - they plug
directly into bedroom wall outlets (phone outlets). So I figure they
do not depend on 'house electricity' at all.

Those are known as "line powered" sets.

It still amazes me when I encounter a household with NO line-powered (corded)
telephones. I inform them that it is prudent to have at least ONE such phone
on hand in the event of a power failure.

More and more folks are depending solely on cordless telephony and wireless
(cell) phones. I am still unconvinced that the "cell" phone network(s) is AS
reliable as the public switched (wired) network, much less MORE reliable,
particularly in the aftermath of a genuine disaster.

As wireless telephony continues to proliferate, is capacity is increased.
However, a disaster is hopefully confined to a small(er) area. In such an
event, the few "cell" sites serving that area would likely be overwhelmed.
Remember: Such service is wireless ONLY until it reaches the nearest tower,
where it rides on land lines and the public switched network.
--

JR