User manual

GSM modem protocol for pCO
2
Carel code +030220330 Rel. 2.0 del 30/10/02
19
•
If the modem used is the SIEMENS TC35, a specific command from its Hayes command set is used.
•
If the used modem is not among those declared as being compatible in the previous table and cannot manage the AT+IFC
command for the disabling software flow control, the modem initialization procedure cannot be correctly executed and
therefore the modem cannot be used in connection with the pCO
2
. To verify the correct management by the modem of the
AT+IFC command for disabling flow control, it may be useful to execute the procedure described below, which explains
how to use the HyperTerminal application contained in Windows™ 95/98/2000/NT, for disabling XON/XOFF software
flow control (in the example for the Wavecom WMOD2B modem). This procedure is however not necessary if you use one
of the tested modems.
HyperTerminal is a terminal emulator generally present among the Windows™ “accessories”, which allows you to configure
the modem using Hayes commands. Before using HyperTerminal, it is necessary to connect the modem to a free serial port
(COMx) on the PC using a serial cable.
1. Go to
Start > Programs > Accessories > HyperTerminal
2. Run
Hypertrm.exe
3. Enter the name of the new connection (as desired), select the desired icon and click <
OK>
. The HyperTerminal window
will appear as follows:
From the “
Connect
:” drop-down menu select “
directly to COMx
” and press <
OK>
. (The COM to be selected must be the one
that the modem is connected to).