Central battery Subscriber a a, Lipe j^_ Local exchange _+ telephone Fig. ... The amplifiers and / or loop extenders as well as the inductive loading are the method used to increase the ... path to provide power to the carbon granules (Hi) a means to indicate the exchange for the need of service when the handset is removedanbsp;...
|Title||:||Telecommunication Switching and Networks|
|Publisher||:||New Age International - 2005|