Cyclopedia of Telephony and Telegraphy, Vol. 2 A General Reference Work on Telephony, etc. etc.

Almost wherever automatic telephony is to be found--and its use is extensive and rapidly growing--the so-called Strowger system is employed. It is so named because it is the out...

=Western Electric No. 1 Relay Board.= The common-battery multiple switchboard differs from the simple or non-multiple common-battery switchboard mainly in the provision of multi...

It has been only within the past three few that the telephone has begun to replace the telegraph for handling train movements. The telegraph and the railroads have grown up toge...

It has been stated that a single exchange may involve a number of offices, in which case it is termed a multi-office exchange. In a multi-office exchange, switchboards are neces...

The power plant is an organization of devices to furnish to a telephone system the several kinds of current, at proper pressures, for the performance of the several general elec...

=Advantages of Common-Battery Operation.= The advantages of the common-battery system of operation, alluded to in Chapter XIII, may be briefly summarized here. The main gain in...

=Definition.= The term automatic, as applied to telephone systems, has come to refer to those systems in which machines at the central office, under the guidance of the subscrib...

=Field of Utility.= The principles of the multiple switchboard set forth in the last chapter were all developed long before the common-battery system came into existence, and co...

The Lorimer automatic telephone system has not been commercially used in this country but is in commercial operation in a few places in Canada. It is interesting from several po...

=Field of Utility.= The multiple switchboard, unlike the transfer board, provides means for each operator to complete, without assistance, a connection with any subscriber's lin...

The term "traffic," with reference to telephone service, has come to mean the gross transaction of communication between telephone users. This traffic may be expressed in whatev...

=The Central-Office Building.= Proper arrangement of the central-office equipment depends largely upon the design of the central-office building. The problem involved should not...

In the commercial relation between the public and a telephone system, the commodity which is produced by the latter and consumed by the former is telephone service. Users often...

=Definitions.= A telephone exchange devoted to the purely local uses of a private establishment such as a store, factory, or business office, is a private exchange. If, in addit...

=Definition.= The term "intercommunicating" has been given to a specialized type of telephone system wherein the line belonging to each station is extended to each of the other...

=Definitions.= Phantom circuits are arrangements of telephone wires whereby more working, non-interfering telephone lines exist than there are sets of actual wires. When four wi...

When the traffic originating in a switchboard becomes so great as to require so many operators that the board must be made so long that any one of the operators cannot reach ove...

Two systems of telephony are now in common use in this country--the manual system and the automatic. With the growth of the automatic, and the gradually ripening conviction, whi...

=Definitions.= Telephone messages between communities are called long-distance messages. They are also called toll messages. Almost all long-distance traffic is handled by messa...

Common-Battery Switchboards--Line Signals--Cord Circuit--Lamps--Mechanical Signals--Relays--Jacks--Switchboard Assembly--Transfer Switchboard--Transfer Lines--Handling Transfers...