Canon fax basic 2000 サービスマニュアル

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BASIC OF TELEPHONE

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Making a Call

There are names for the party being called and the party making the call.

When we make a call, one of the two parties must first dial to call up the

other party by the bell on its telephone. Making a call in this way, that is,

dialing is called the “outgoing call”, and the call that arrives is called the

“incoming call”.

Fig. 1-3   Telephone Call State (1)

When you lift the handset, the handset is “off-hook”. When you hang up,

the handset is “on-hook”.

These days, some telephones have an on-hook button. For example, even if

the handset is placed on the telephone body, pressing this on-hook button

sets the telephone to the same state (on-hook) as when the handset is

picked up.

Fig. 1-4   Telephone Call State (2)

Outgoing call

Incoming call

Off-hook

On-hook