insys icom Pocket ISDN, Manual, Page: 28 / 84

Functions INSYS Pocket ISDN
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10 Functions
10.1 Establishing or Accepting a Data Connection
The INSYS Pocket ISDN can call another ISDN TA (ISDN Terminal Adapter) via the
phone line and establish a data connection. After dialling a phone number, the
INSYS Pocket ISDN 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 Pocket ISDN 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 Pocket ISDN processes the entered characters
as AT commands and does not transmit them to the remote terminal.
The INSYS Pocket ISDN 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 Pocket
ISDN does not accept the incoming connection. In this case, the hardware data
flow control must be disabled in the INSYS Pocket ISDN that a connection is
accepted regardless of the status of the application. The INSYS Pocket ISDN
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 INSYS Pocket
ISDN, 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