A PSTN may use a POTS line (dial-up connection), however, the PSTN may use other technologies as well. So, POTS refers to a way of connecting to an ISP or other service using a dial-up connection, whereas the PSTN refers to the phone company providing several kinds of data service connections.
WHAT IS THE DIFFERENCE BETWEEN ISDN AND PSTN ? The PSTN is the Public Switched Telephone Network and is therefore a service provided by a telecommunications company. The ISDN is the Integrated Services Digital Network and is a technology, providing digital end to end connectivity. However, calls originating from an ISDN site, will transverse the PSTN in order to be received by the called party. The call received by the called party, may be digital, if they also have ISDN service, or the call may be converted by the central office to meet the technology being used by the receiving party.
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Is it Afghans??? They are also referred to as Afghani's.
A website address is also referred as a URL, or Uniform Resource Locator. It can also be called a site.
It was also referred to as the Eastern Roman Empire.
Gliders and are also referred to as a sailplanes.
They are called homologous chromosomes (but can also be referred to as homologues or homologs).
it can be called migration yet it is also referred to as urbanization.
The upper part of the foreleg of a pig is referred to as a callie. It is also referred to as the picnic.
Ouija parties can be called just that, or sometimes they are also referred to as a Seance'.
A nearsighted person is also referred to as being myopic, or as having myopia.
They are also referred to as the outer planets.