Datasheet

INSYS Modem 336/56k 4.1 (UL) Functions
5.2.4 Hardware Data Flow Control with RTS/CTS
Hardware Data Flow Control with the Modem (CTS).
Modem
RS232 Cable
CTS Line
Application
(E.g.: PC or con-
trol)
When the input buffer of the modem exceeds a certain fill state,
the modem will set the CTS line to OFF. This indicates to the ap-
plication not to send any data.
After the modem has operated the input buffer so far that the
XON buffer falls below a certain fill state, it switches the CTS line
back ON and reports to the application that it is ready to receive
data again.
5.2.5 Hardware data flow control with the application (RTS)
Modem
RS232 Cable
RTS Line
Application
(E.g.: PC or con-
trol)
AT&K3 AT&R1
The application sets the RTS line to OFF to request from the mo-
dem to interrupt the data transmission.
AT&K AT&
R
It will depend on the according application software if the RTS/CTS
lines can be operated.
The application sets the RTS line to ON to request data from the
modem.
Configuration with HSComm (settings according to the require-
ments):
July 06 21