Canon FACSIMILE BASIC 2000 Service Manual page 30

BASIC OF TELEPHONE
• District center (DC)
DCs have been established in every seat of prefectural government of the
same rank city.
• Toll center (TC)
TCs have been established at central towns in a district center area.
• End office (EO)
An end office (EO) is an office that connects telephones in a subscriber
area.
5.3.1 Local telephone network
The subscriber area has one end office, which connects all the telephones
in the area. In this case, the subscriber area is called a single office area.
As the number of telephones increase, there will also be an increase in the
number of end offices called branches. These branch offices are connected
in a mesh network. In this case, the subscriber area is called a multiple
office area.
1–22
Subscriber area (Single office area)
I'm a single
office.
Fig. 1-27 Single Office Area
Subscriber area (Multiple office area)
We are
multiple
offices.
Fig. 1-28 Multiple Office Area