Question

How can I receive/send SMS through Windows dial up networking session (DUN) when the serial port was taken by the DUN

Asked by: simonho

Hi all,

I connect to the internet using Wavecom FastTrack GPRS modem using Windows XP. I was able to send/receive SMS using AT commands via hyperterminal.  I also setup a dial up neworking (DUN) to connect to internet using TCP/IP.  Currently, I am developming a program which allows me to exchange data over WinSocket/TCP/IP over the DUN session. However,  this program need to send/receive SMS pierodically (every 5 minute) so that it can receive command sent from other device via SMS.

My problem is currently I am relying on sending AT commands to send/receive SMS but when I am running under DUN session, the COM port (COM1) was completely taken over by the DUN  session. How can I bypass DUN to send AT commands to serial port or is there any way I can send/receive SMS over the DUN (which is ppp )? The most important is how can I detect and receive incoming SMS when the DUN session.

Thanks for your help

Simon Ho

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Asked On
2004-03-03 at 09:54:32ID20905804
Tags

sms

,

send

,

through

,

gprs

Topic

General Packet Radio Service (GPRS)

Participating Experts
3
Points
250
Comments
8

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Answers

 

by: SimonTayPosted on 2004-03-04 at 07:48:07ID: 10514881

Some modems support a serial port multiplexer, like the Siemens modems.  This means that although you have only one physical port, there are three available in the PC.  One for DUN, one for SMS and one for something else...

Simon

http://www.tdc.co.uk/manufacturers/siemens.htm - you can download it from here.

 

by: simonhoPosted on 2004-03-04 at 09:31:48ID: 10515911

Simon,

Thanks for your suggestion. However,  your solution relies on specific modem hardware support.

I would like to know any software solution under Windows XP environment for this problem. Can I use SMS - PDU mode to receive and send SMS over the DUN session so that I do not need to send AT command to serial port directly


Simon Ho

 

by: SimonTayPosted on 2004-03-04 at 09:33:52ID: 10515929

You won't send SMS over DUN, as this is a TCP/IP connection.  Maybe Wavecom support a multiplexer mode? (or maybe not!).

Maybe you need to buy a different modem to perform simultanous DUN connection and SMS.  Otherwise you will need to close the DUN connection, do the SMS work, then re-connect.

Simon

www.tdc.co.uk

 

by: simonhoPosted on 2004-03-04 at 14:38:42ID: 10518503

Simon,

Yes, I might be running of choice that I had to switch between SMS and DUN mode back and forth.

However, I had a Sierra Wireless Card 750 GPRS modem PC card.  This modem card comes with a driver software. Once I intalled the software a virtual serial port was created at COM4. I can send SMS AT commands to COM4 and at the same time I can use the IE to browse the internet using TCP/IP. There was no conflict among the two sessions. Do you know Wavecom has similar software or there is outside 3rd party software that can do the same function?


Simon Ho


 

by: SimonTayPosted on 2004-03-05 at 06:17:03ID: 10522721

I imagine it too used some multiplexer software, I do not know if Wavecom have similar software available.

 

by: zahidrahimPosted on 2004-04-07 at 23:40:18ID: 10781311

Hi,
  i have siemens SL45i which support only PDU mode can some one create a string for me to send sms using hyperterminal,
Th destination phone number is
+923006660933
+92 country code
300 Mobilink Service provide
6660933 Mobile Number
  or any one tell me the easiest method to send msgs on PDU mode text to PDU conversion is a big problem for me.  waiting for help very badly, Zahid

 

by: SimonTayPosted on 2004-04-08 at 01:18:38ID: 10781703

0001000B812903606690F300000BD3E614D42CCFE7E17319

is a PDU, message is "SMS Message" - created using PDUSpy.

 

by: ericccsPosted on 2005-02-24 at 22:20:06ID: 13400558

Wow, I never hear such program (PDUSpy) can i get it free??

20120131-EE-VQP-002

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