Having called VoIP a kind of landline, I was taken to task by a couple
of you here, Doing more research on the way the terms are used, it
appears that I was wrong and you were right. The name "VoIP" is
apparently not used the same way as the same as the term "landline."
See, for example,
http://science.opposingviews.com/difference-between-voip-landline-17888.html
But then I have question: what term can be used to describe all kinds
of plugged-in telephones (landline or VoIP) to distinguish them from
cellular phones?
I don't think there *is* a term, in the way you describe.
As I see it, there are three basic ways of making phone calls:
a) Using a telephone connected to a physical land-line (which connects
to a telephone exchange). This includes DECT phones connected wirelessly
to a base plugged into a land-line.
b) Using a cell-phone, connected wirelessly to a mobile phone network
c) Using an internet phone. This includes VoIP and Skype etc. and
requires an internet connection and suitable equipment to enable a phone
to make use of that connection. It may use a special handset, or it may
use the same sort of handset as is used on a fixed line connection, but
connected via an ATA (see
http://en.wikipedia.org/wiki/Analog_telephone_adapter). Incidentally,
the internet connection used by an internet phone could well be provided
by a cellphone network rather than by a land-line.
--
Cheers,
Roger
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