INSYS ISDN TA 4.0
Functions
9
Functions
9.1
Establishing or Accepting a Data Connection
The INSYS ISDN TA 4.0 can call another ISDN TA (ISDN Terminal Adapter) via the
phone line and establish a data connection. After dialling a phone number, the
INSYS ISDN TA 4.0 synchronises with the called TA and opens a data connection.
All incoming characters are transmitted to the other (called) TA during the active
data connection. Therefore, AT commands are not processed during a connection.
The INSYS ISDN TA 4.0 must be changed to command mode again using an
"Escape sequence" that it processes AT commands again during an active
connection. Then, the local INSYS ISDN TA 4.0 processes the entered characters as
AT commands and does not transmit them to the remote terminal.
The INSYS ISDN TA 4.0 can accept an incoming connection in the same way. For
this, the "application" or the PC with the terminal program must support the
hardware data flow control at the serial interface, otherwise, the INSYS ISDN TA
4.0 does not accept the incoming connection. In this case, the hardware data flow
control must be disabled in the INSYS ISDN TA 4.0 that a connection is accepted
regardless of the status of the application. It answers after the configured number
of ring tones and opens a connection.
This hardware data flow control is activated by default.
Configuration with HSComm
The HSComm enables to establish a connection via the integrated
terminal program. Click "Terminal" (page 35, Figure 7, position 3) in the
menu bar of HSComm, to open the integrated terminal program.
Configuration with AT commands
In order to establish a data
connection with the INSYS ISDN
TA 4.0, use the command
Replace
<number>
with the phone
number of the remote terminal.
ATD<number>
Configure the data connection
protocol using the command
Refer to the AT command
reference for protocol details.
ATB
39
