Ericsson G36 - Manual (Page 23)

Fixed Wireless Terminal: G32 & G36 23
Tip: If you already have an Internet connection configured for a
fixed line, you do not need to make any changes, just connect
your PC to the FWT line (RJ11) instead of a fixed line.
Note: If your modem is an old model and it is not able to send
the CNG tone, you should include *02* before the destination
number (B-number) in order to indicate to the FWT that the call to
be made is a data call (Example: *02*B-number). This is usually
not necessary, as most modems automatically send the CNG
tone so that the data call is made automatically by the FWT.
Incoming data calls are received in the same way as using a fixed line.
Note: If you have a SIM card that does not support separate
voice and data numbers, the FWT does not recognize the type of
incoming call. This means that the calling party will have to inform
you each time a data call is about to be made. In this case, dial
*9902# to prepare your FWT to receive a data call, Dial *9903# (to
change back to voice).