Planet IG-100 User Manual page 22

Dial-up Connection Details
If you are using a dial-up connection, the following data must
also be provided.
Telephone
Modem
Initial String (AT Commands)
For the Internet Gateway to function correctly, the modem or
ISDN TA must be configured correctly. The table below shows
the required settings, and the usual AT command.
Setting
Fixed baud rate setting
RTS/CTS flow control
DCD to track the presence of a carrier
DTR off to hang-up modem
DSR always on
Modem to return modem-to-modem
data link speed
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.
One (1) number is essential; the other 2 are
optional. Use the format described in your
modem's user manual.
If your Modem or ISDN TA is listed, simply
select it. Otherwise, try Hayes compatible.
If this does not work, select Other and enter
the required "Initial String" (see below)
Internet Access
AT Command
AT&B1
AT&K3
AT&C1
AT&D2
AT&S0
ATX4