A simple telephone loop includes a receiver and a transmitter, a power supply and a line, all of which are connected in series.

In fact, the fixed telephone should also include ringing line, dialing loop and caller ID function, and the telephone should also cooperate with the exchange of the telecommunication bureau to complete the dialing work.

Now the fixed line doesn't need so much trouble, just pick up the receiver and dial. In addition, the advantages of cordless phones are integrated in new products and designs. There is a portable landline on the base of the landline. Within the permitted range of the landline, you can make a phone call while walking, which has a quality call effect. The landline is no longer fixed.