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Hello! Who's that calling?
Handset in use
Extension telephone cannot be used.
Handset not in use
(on-hook)
Hello! Who's tha t
calling?
Extension telephone can be used.
Handset off-hook
Extension telephone cannot be used.
Fig. 6-16 Prioritized Connection
FACSIMILE SYSTEM
Hello! Who's
Exchange
that calling?
Hello! Who's
Exchange
that calling?
When the handset is
made off-hook
Exchange
1
2
3
4
5
6
ït
çi
6–15
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