http://wiki.answers.com/Q/How_is_the_data_and_imformation_transimited_over_public_telephone_network,public switched telephone networks and intergrated service digital networks.
PSTN Network (Public Switch Telephone Network)
Public Switched Telephone NetworkPublic Switched Telephone NetworkPublic Switched Telephone NetworkPublic Switched Telephone Network
PSTN Network (Public Switch Telephone Network)
PSNT Public Switched Telephone Network
much bandwidth is used
Analog connection to the Public Switched Telephone Network.
local loop equipment
Telephone mainlines are telephone lines connecting a customer's equipment to the public switched telephone network.
its rubbish
All phones.
Analog switches Fiber optic cables
Cellular Telephones is using the Integrated Services Digital Network ISDN while the Cordless Telephone is using the Public Switched Telephone Network PSTN, same with ordinary telephone.