insys icom i-modul ISDN HIX V4, Руководство дизайнера, Страница: 18 / 76

Functions i-modul ISDN HIX V4
6 Functions
6.1 Establishing or Accepting a Data Connection
The i-modul ISDN HIX V4 can call another ISDN TA (ISDN Terminal Adapter) via the
phone line and establish a data connection. After dialling a phone number, the i-
modul ISDN HIX V4 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 i-modul ISDN HIX V4 must be changed to command mode again using an
"Escape sequence" that it processes AT commands again during an active
connection. Then, the local i-modul ISDN HIX V4 processes the entered characters
as AT commands and does not transmit them to the remote terminal.
The i-modul ISDN HIX V4 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 i-modul ISDN HIX
V4 does not accept the incoming connection. In this case, the hardware data flow
control must be disabled in the i-modul ISDN HIX V4 that a connection is accepted
regardless of the status of the application. The i-modul ISDN HIX V4 answers after
the configured number of ring tones and opens a connection.
This hardware data flow control is activated by default.
Configuration with AT commands
In order to establish a data
connection with the i-modul ISDN
HIX V4, use the command
Replace
<number>
with the phone
number of the remote terminal.
ATD<number>
In order to configure the data
connection protocol, use the
command
Refer to the AT command
reference for protocol details.
ATB
In order to configure the data
connection protocol, use the
alternative command
Refer to the AT command
reference for protocol details.
AT**PROT
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