-1 TELEPHONE NETWORK Telephone networks use circuit switching. The telephone network had its beginnings in the late 1800s. The entire network,which is referred to as the plain old telephone system (POTS),was originally an analog system using analog signals to transmit voice. Topics discussed in this section: Major Components LATAS Signaling Services Provided by Telephone Networks 9.2 9.2 9-1 TELEPHONE NETWORK Telephone networks use circuit switching. The telephone network had its beginnings in the late 1800s. The entire network, which is referred to as the plain old telephone system (POTS), was originally an analog system using analog signals to transmit voice. Major Components LATAs Signaling Services Provided by Telephone Networks Topics discussed in this section: