PSTN / ISDN
PSTN stands for Public Switched Telephone Network, also knows as the Plain Old Telephone System (POTS). It is basically the inter-connected telephone system, over which telephones calls are made via copper wires.
PSTN is based on the principle of circuit switching. Therefore when a call is made, particular dedicated circuit activates which eventually deactivates when call ends. Telephone calls transmits as analogue signals across copper wires.
Fixed telephone subscription refers to a natural person or legal entity connected to the public switched telephone network (PSTN). Number of fixed telephone subscriptions is measured as a number of active fixed telephone lines (PSTN lines).
ISDN stands for Integrated Services Digital Network. it is designed for a completely digital telephone/telecommunications network. ISDN is designed to carry voice, data, images, video, etc. It is also designed to provide a single interface (interms of both hardware and communication protocols) for hooking up phones, fax machines, computers, video phones, video-on-demand systems, etc.
One key difference between ISDN and PSTN is the duplex mode. Analog transmissions operate at half-duplex; they can only send data or receive data, not both at the same time. Digital transmissions operate at full duplex they can send and receive data the same time.
PSTN is based on the principle of circuit switching. Therefore when a call is made, particular dedicated circuit activates which eventually deactivates when call ends. Telephone calls transmits as analogue signals across copper wires.
Fixed telephone subscription refers to a natural person or legal entity connected to the public switched telephone network (PSTN). Number of fixed telephone subscriptions is measured as a number of active fixed telephone lines (PSTN lines).
ISDN stands for Integrated Services Digital Network. it is designed for a completely digital telephone/telecommunications network. ISDN is designed to carry voice, data, images, video, etc. It is also designed to provide a single interface (interms of both hardware and communication protocols) for hooking up phones, fax machines, computers, video phones, video-on-demand systems, etc.
One key difference between ISDN and PSTN is the duplex mode. Analog transmissions operate at half-duplex; they can only send data or receive data, not both at the same time. Digital transmissions operate at full duplex they can send and receive data the same time.
Source : SKMM
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Qatar
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Iran
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Iraq
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Bulgaria
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