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On-Hook signal recognition
time
Ideal mode
Talk mode
10.2 Making an Outgoing Call
Case No
Representation
When A is in the idle mode
0
1.
2.
3.
4.
5.
6.
7.
When A at Case 0, step 3
1
1.
2.
3.
4.
1.1
When A at Case 1, step 2
1.
2.
2
When A at Case 0, step 2/3/4/5/6
1.
2.
3.
3
When A at Case 0, step 4
1.
2.
3.
4
When A at Case 0, step 6/7
1.
2.
3.
4.
5
When A at Case 0, step 7 (talk mode)
1.
2.
3.
4.
6
When A at Case 0, step 7 (talk mode)
1.
2.
3.
To hear the PTT telephone line dial tone on lifting the telephone A or B OFF-HOOK, use the following
command in HyperTerminal. i.e. AT%A5=0.
To hear the ISDN TA's internal dial tone on lifting the telephone A or B OFF-HOOK, use the following
command in HyperTerminal. i. e. AT%A5=1.
D-LINK ISDN TA DMI-128ESU+
♦ TA detects a Flash-Hook signal from TEL-A/B
♦ If Flash-Hook time >=2.2 sec then it is a correct
On-Hook signal
♦ On-hook, disconnected and no any event
occurred to the POTS interface
♦ Off-Hook and talking with only one other party
A off-hook
A hears TA's DT
A dials the telephone number of C
TA2 rings C (if C is in idle mode, TA2 sends ICR to C)
A hears Network's RBT
C off-hook (TA2 stops ICR)
A talks to C (A is in talk mode with C)
If C is busy
A hears TA's BT
A on hook
A returns to idle mode
A flash
A go to Case 0, step 2
A on-hook
A is disconnected
A returns to the idle mode
A flash
TA2 stops to ring C
A go to Case 0, step 2
A flash
C is disconnect
C hears Other TA's BT
A go to Case 0, step 2
A on-hook
C hears Other TA's BT
A is disconnected
A returns to idle mode
C on-hook
C is disconnected
A go to Case 1, step 2
51
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