Canon fax basic 2000 Manuale Di Servizio

BASIC OF TELEPHONE

1–22

• 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.

Fig. 1-27   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.

Fig. 1-28   Multiple Office Area

Subscriber area (Single office area)

I'm a single

office.

Subscriber area (Multiple office area)

We are

multiple

offices.