If you are using a telephone, your voice, which is analog, is converted into digital when it enters the switching equipment. If you are using a computer, its digital signal is converted to analog by a modem. This analog signal is converted back to digital at the local exchange. ISDN can be looked at in […]
Any customer connected to a subscriber’s loop who receives and pays for telephone services is called a subscriber. Many pairs of wires are used to connect all the telephones in a subscriber’s loop. To easily distinguish one pair of wires in a cable from all of the others, each pair is coded and numbered according […]
Regardless of the layout, all the telephones and the associated wires connected to a local exchange are collectively known as the Local Line Distribution Network. A network is nothing but a collection of inter-connected devices whose purpose is to communicate. Local distribution facilities carry signals from the subscriber’s instrument to the local common carrier office […]
