as2574b austriamicrosystems, as2574b Datasheet - Page 16

• Manufacturer Part Number: as2574b
• Description: 20 Number One Touch Dialler With Serial Bus For Display Driver
• Manufacturer: austriamicrosystems

Data Sheet
Hook States
Rev. 1
1) Pressing any unvalid key doesn´t have any effect in Idle state.
2) POT means Plain Ordinary Telephone.
3) Lift handset means HS going high.
4) Replace handset means HS going low.
5) Lifting the handset during ACP will change the hook state to POT, however, the dialling will continue uneffected.
LS
P O T
Monitor
P O T
+
2)
5)
LS
LS
Handsfree
Monitor
1)
Idle
or
16
Diode
5 ?
N
M
Y
( )
finished
Dialling
Call Progress
Automatic
(ACP)
Y
LS
N
AS2574B
Jan. 1995
On-hook
Off-hook