> - Modem has to be Hayes compatible device (not all GSM modems are)> - Hayes
> compatible device needs to be synchronized using AT prefix firstIf you mean
> compatible with the AT commandset then YES it is. In fact I have used Windows
> Hyperterminal + other terminals (don't have the name with me, but is was
> shareware I found on the internet) to send & receive SMSmessages with it,
> using the AT command set. It is with synaser that it doesn't work.> - Modem
> has to recognize end of command (CR)I don't know if Hyperterminal or other
> programs that I have used transmit the CR character in a way different than
> Synaser, but it has worked with them so my presumption is that YES it does
> recognise it.> - To respond with ERROR, it has to be set in VERBOSE mode
> (command V1),> otherwise it responds by single digitok, don't quite
> understand this but is it something critical in transmiting an AT command to
> the modem? I know it DOES respond with ERROR because I have seen it doing so
> when I sent rubish commands from Hyperterminal. > Anyway, did you try to
> communicate with your modem via terminal> manually (switching echo ON by E1
> command)?As I said above, YES, from hyperterminal. I had echo on locally, not
> by modem - I know local echo doesn't tell you anything but as I said I have
> sent and received SMS already using AT commands, that should be enough
> evidence that the modem is communicating, right? > If not, it should be your
> first step before you start programming,> because of some modems use voltage
> on handshake output signals> to supply V.28 drivers built in the cable hence
> you have> to preset them to correct levels.Again, I don't quite understand
> this but is it something I could/ should adjust in the synaser code? I mean
> the fact that the modem works with other terminals should be proof that
> signal levels are right...right?> Date: Mon, 2 Apr 2007 10:22:39 +0200> To:
> [email protected]> From: [EMAIL PROTECTED]> Subject: Re:
> [Synalist] URGENT-help with synaser COM port code needed> > Dne Mon, 02 Apr
> 2007 09:53:16 +0200 Petros Tavridis > <[EMAIL PROTECTED]> napsal/-a:> > >
> Presumably if the the command DID reach the modem but was,say, in the > >
> wrong format, the modem would return ERRORand the code wouldn't time > >
> out.> > This is not an exact presumption:> - Modem has to be Hayes compatible
> device (not all GSM modems are)> - Hayes compatible device needs to be
> synchronized using AT prefix first> - Modem has to recognize end of command
> (CR)> - To respond with ERROR, it has to be set in VERBOSE mode (command
> V1),> otherwise it responds by single digit> > ---> > Anyway, did you try
> to communicate with your modem via terminal> manually (switching echo ON by
> E1 command)?> > If not, it should be your first step before you start
> programming,> because of some modems use voltage on handshake output signals>
> to supply V.28 drivers built in the cable hence you have> to preset them to
> correct levels.> > > HTH, pf> >
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