PSTN is the global collection of interconnects originally designed to support circuit switched voice communication.
The PSTN provides traditional Plain Old Telephone Service (POTS), also known as “landline phone” service , to residences & many other establishments.
Parts of the PSTN are also utilized for DSL, voIP & other Internet based network technologies.
2. PSTN is the global collection of interconnects originally
designed to support circuit switched voice
communication.
The PSTN provides traditional Plain Old Telephone
Service (POTS), also known as “landline phone”
service , to residences & many other establishments.
Parts of the PSTN are also utilized for DSL, voIP &
other Internet based network technologies.
CREATED BY – RAHUL DAREDIA
4. One PSTN link supports 64 kilobits per
second(kbps) of bandwidth for data.
In residences, the PSTN phone line typically carries
this bandwidth over a copper cable.
Traditional dial-up network modems utilize nearly
56 kbps of this bandwidth when connected to a
phone line. The PSTN utilize the SS7 signaling
protocol.
CREATED BY – RAHUL DAREDIA
5. The public switched telephone network(PSTN) is the
aggregate of the world ‘s circuit switched telephone
networks that are operated by national, regional , or
local telephone operators , providing infrastructure &
services for public telecommunication.
The PSTN relies on circuit switching. To connect one
phone to another , the phone call is routed through
numerous switches operating on a local, regional,
national or international level.
CREATED BY – RAHUL DAREDIA
6. In the early days, phone calls traveled as analog
signals across copper wire.
Every phone call needed its own dedicated copper
wire connecting the two phones.
That ‘s why you needed operators assistance in
making calls.
The operators sat at a switchboard, literally
connecting one piece of copper wire to another so
that the call could travel across town or across the
country.
CREATED BY – RAHUL DAREDIA
7. Long-distance calls were comparatively expensive,
because you were renting the use of a very long piece
of copper wire every time you made a call.
Beginning in the 1960s, voice calls began to be
digitized & manual switching was replaced by
automated electronic switching.
Digital voice signals can share the same wire with
many other phone calls.
The advent of fiber-optic & other high-bandwidth
cables haven’t changed the basic nature of circuit
switching, which still requires a connection or circuit
to remain open for the length of the phone.
CREATED BY – RAHUL DAREDIA
