Telephone modem

  • Thread starter Thread starter Peter
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Peter

Hello all,

In my device which is not a pocketpc , but a wince 4.2 device, I have a
internal GPRS/GSM modem.
How can I make a telephone call with this internal modem ?
I tried to make the tapi wrapper from Alex Feinamn working but sofar it will
not work for my device.
In the Alex Feinman sample program all my comports are listed in the
lvDevices listview, also the internal modem, however two times ? 1)
Internal modem on com8 and 2) Hayes compatible on COM8 ??
I tried to use both and make a phone call but I get an exception :
OpenNETCF.Tapi.TapiException : INVALCALLHANDLE
Also in program start there is a message : "Could not find cellular line"
Must I first somehow open a cellular line ??
I don't know much about Tapi , so it's a very complicated for me.


Any remarks and suggestions are very welcome !

Thanks
Peter.
 
Peter said:
Hello all,

In my device which is not a pocketpc , but a wince 4.2 device, I have a
internal GPRS/GSM modem.
How can I make a telephone call with this internal modem ?
I tried to make the tapi wrapper from Alex Feinamn working but sofar it will
not work for my device.
In the Alex Feinman sample program all my comports are listed in the
lvDevices listview, also the internal modem, however two times ? 1)
Internal modem on com8 and 2) Hayes compatible on COM8 ??
I tried to use both and make a phone call but I get an exception :
OpenNETCF.Tapi.TapiException : INVALCALLHANDLE
Also in program start there is a message : "Could not find cellular line"
Must I first somehow open a cellular line ??
I don't know much about Tapi , so it's a very complicated for me.


Any remarks and suggestions are very welcome !

Thanks
Peter.
Click to expand...


Hello Peter,
I think that you must find a documentation for your modem! I use an
external serial GSM/GPRS modem for one project on Windows CE 4.2 powered
device, but it communicates with AT commands. According to me you
haven't a cellular line on the device


Regards
Tihomir Ignatov
 
Thanks Tihomir,

Thanks for your information ! As I understand you correctly I must (in C#)
open the comport and send AT Commands to get it going ?
Is there any example how to get this going ? for example to make a simple
phonecall ???

Kind regards,

Peter.
 
Peter said:
Thanks Tihomir,

Thanks for your information ! As I understand you correctly I must (in C#)
open the comport and send AT Commands to get it going ?
Is there any example how to get this going ? for example to make a simple
phonecall ???

Kind regards,

Peter.
Click to expand...
Hi Peter,

Yes, you must open COM port and send AT command, but you must find some
documentation for you modem. You can use
http://www.opennetcf.org/library/ and OpenNETCF.IO.Serial Namespace.

Regards,
Tihomir Ignatov
 
Thanks again Tihomir,

Ok I have found documention and AT Commands documentation (a very large
file) for my modem which is by the way a wavecom Q2426 modem.

For now I'm working with a RAS connection to send my data with a webrequest.
Can I do the same with AT Commands ? or is this a whole new approach ?
Can you put me on the right track to start with a little example if this
isn't ask to much ? That should be very welcome to get me going.

Many thanks and kind regards
Peter.
 
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