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3Systemdescription
24 Vista SmartTel
Pin assignment of
RS-232 interface
Connectorendview/9pin
Sub-Dsocket
Audio connections SmartTel
UsingtheoptionalAudio CardwithSmartTeldevices,youalwaysshould
usea3.5mmstereojackfortheaudioconnectionsMic,Line inandLine
out.Pleaseobservethefollowingtableforconnectiondetails.
Connections
stereo jack

Pin Type Function Code
designation
1- - -
2 Output TransmitData TxD
3 Input ReceiveData RxD
4- - -
5 Ground Ground GND
6- - -
7 Input CleartoSend CTS
8 Output ReadytoSend RTS
9- - -
Input Pin 1 Pin 2 Pin 3
Mic signal noconnection ground
Line in signal noconnection ground
Line out signal noconnection ground
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