4.3
INTRODUCTION TO SWITCHING
69
1. Interconnection
2. Control
3. Alerting
4. Attending
5. Information receiving
6. Information transmitting
7. Busy testing
8. Supervisory
Consider a typical manual switching center illustrated in Figure 4.7. Here the eight basic
functions are carried on for each call. The important interconnection function is illustrated
by the jacks appearing in front of the operator. There are subscriber-line jacks
9
and jacks
Figure 4.7
A manual exchange illustrating switching functions.
9
A jack is an electric receptacle. It is a connecting device, ordinarily employed in a fixed location, to which a
wire or wires may be attached, and it is arranged for the insertion of a plug.
Summary :
The important interconnection function is illustrated by the jacks appearing in front of the operator. There are subscriber-line jacks 9 and jacks Figure 4.7 A manual exchange illustrating switching functions.
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jacks,switching,illustrated,manual,figure,interconnection,functions,information,typical,wires,important,busy,subscriberline