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16. INCOMING OUTSIDE LINE CALLS (DIRECT-IN DIALING)
16.1. Direct-In Dialing Function
Outside line calling parties can be connected to a desired master station (telephone) or substation by directly
dialing the station number.
16.2. Incoming Outside Line Call Operation
Step 1. When a call is received from the outside line, the AI-900 system's exchange automatically responds
by transmitting a dial tone to the calling party.
Step 2. After hearing the dial tone, dialing the station number will connect the calling station to the called
party.
No. 90
Call tone
No. 91
No. 92
[Operation details]
(1) If the calling party does not dial a station number within 10 seconds after the confirmation tone is
transmitted, the registered Direct-In Line stations are called. (See the figure in section 15.2. on the
previous page.)
(2) If the called station does not answer for 30 seconds or more after the calling party dials the station
number, the call is canceled.
Note: The Call Forwarding, Busy Call Forwarding or No-Answer Call Forwarding function can be used unless
the station to which calls are transferred is a outside line telephone.*
1
*
Calls can be automatically forwarded if the station called from the outside line is currently in Call
Forwarding, Busy Call Forwarding or No-Answer Call Forwarding mode (when the station to which
calls are transferred is a master station or telephone).
2
*
Calls cannot be automatically forwarded when the station called from the outside line is currently in
Outside Line Call Forwarding, Outside Line Busy Call Forwarding, or Outside Line No-Answer Call
Forwarding mode (when the station to which calls are transferred is a outside line telephone).
Call
AI-900
exchange
CHAPTER 3. CONVENIENT FUNCTIONS
Outside line
Outside line
telephone No.
1
2
*
Dial
9
1
tone
Station No.
3-21
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