Internet Router User Guide
48
Initial String (AT Commands)
For the Internet Router to function correctly, the modem or ISDN TA must be
configured correctly. The following table shows the required settings, and the usual
AT command.
Setting
AT Command
Fixed baud rate setting
AT&B1
RTS/CTS flow control
AT&K3
DCD to track the presence of a carrier
AT&C1
DTR off to hang-up modem
AT&D2
DSR always on
AT&S0
Modem to return modem-to-modem
data link speed
ATX4
Using these commands, the Initial String would be as follows:
AT&F&B1&K3&C1&D2&S0X4
The first command (AT&F) sets the modem to its factory defaults. See Appendix B
- AT Commands for further details.
Advanced Port Settings
Most users should not have to change these settings. They are provided for the
following situations:
<
Your modem uses non-standard AT commands.
<
Your ISP does not use the standard PPP connection, and requires a special log-
in procedure.
<
You wish to change the "Time-out" period after which an inactive connection
will be terminated.
The Advanced Port Screen is reached by clicking the Adv. Port button on the Port
Configuration screen. You will then see a screen like the example below.
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