USSD commands with Vodafone Mobile Connect Lite

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the1ne

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Hi Guys

I'm trying to write a little C# application that send USSD commands to Vodacom via Vodafone Mobile Connect Lite usb modem.

Whilst "AT+COPS?" works fine, "AT+CUSD=1,*111#, 15" command sometimes works and sometimes it doesn't. When it does work, it tried to send "AT+CUSD=1,1, 15" (to choose an option) which has not worked yet.

The kind of errors I get are:
No response from modem
Phone is Busy

Does anyone know Why I'm getting there and where I'm going wrong?

Your help will be highly appreated.
Thank you
 
the1ne said:
Whilst "AT+COPS?" works fine, "AT+CUSD=1,*111#, 15" command sometimes works and sometimes it doesn't. When it does work, it tried to send "AT+CUSD=1,1, 15" (to choose an option) which has not worked yet.
Click to expand...
Try putting the string in double quotes as follows:
AT+CUSD=1,"1",15
Click to expand...
And no space before the 15.
 
ginggs said:
Try putting the string in double quotes as follows:

And no space before the 15.
Click to expand...

Did that, gave me the same problem.

Is there any thing I should put between the first command and the second command? Because it keep on giving that "Phone is busy" error
 
the1ne said:
Did that, gave me the same problem.
Click to expand...
Modem make and model?
the1ne said:
Is there any thing I should put between the first command and the second command? Because it keep on giving that "Phone is busy" error
Click to expand...
I haven't needed to, I just send the USSD command, wait until the menu is received and then send the menu option.
 
Okay thanks, I suspect it could be a modem that I'm using because I do it exactly the same way you did it. I need to do a lot of digging around as I'm tasked to find out how to setup a USSD server and write the server side of it so that it can handle client requests.

Thanks for you help so far. If you have any valuable links and info for me and USSD, please swing it along
 
Oh, sorry

I am using Vodafone Mobile Connect Lite USB Modem, Model: K3765-Z
 
No, I dont think we have it here at work. The one I was using belongs to one of the managers. Is there a difference between the two model?
 
the1ne said:
Okay thanks, I suspect it could be a modem that I'm using because I do it exactly the same way you did it. I need to do a lot of digging around as I'm tasked to find out how to setup a USSD server and write the server side of it so that it can handle client requests.

Thanks for you help so far. If you have any valuable links and info for me and USSD, please swing it along
Click to expand...

Have fun! Reason why I'm not involved in the USSD side of our company :D . Unless you work for a WASP I'm going to be brutally honest and tell you to consider working though a WASP instead.

You still have to resolve the issues of timeouts, keeping transaction states, the dreaded 20 second session limits, etc ... oh an not to forget the activation issues with each network, as mentioned have fun :D
 
ginggs said:
That's the one made by ZTE, any chance you could find one made by Huawei?
Click to expand...

VC seems to only have the ZTE ones in stock. When I did an upgrade last month, my SP could not get any Huawei. Another thing is that ZTE seems to be the next preferred vendor (personally I prefer Huawei).
 
cbrunsdonza said:
Have fun! Reason why I'm not involved in the USSD side of our company :D . Unless you work for a WASP I'm going to be brutally honest and tell you to consider working though a WASP instead.

You still have to resolve the issues of timeouts, keeping transaction states, the dreaded 20 second session limits, etc ... oh an not to forget the activation issues with each network, as mentioned have fun :D
Click to expand...

You scaring me now LOL. I think the reason we going with USSD is that we want to cater for all mobile phones, not only WAP enabled.
 
cbrunsdonza said:
Have fun! Reason why I'm not involved in the USSD side of our company :D . Unless you work for a WASP I'm going to be brutally honest and tell you to consider working though a WASP instead.

You still have to resolve the issues of timeouts, keeping transaction states, the dreaded 20 second session limits, etc ... oh an not to forget the activation issues with each network, as mentioned have fun :D
Click to expand...

And this is a new project in our company and there could be many more to come. So it makes sense that we should it ourselves
 
If your company does not have a WASP licence then your not going to get a USSD bind from the networks. You will have to operate through a WASP then. The WASP will act as a gateway and you connect to their USSD platform.

Asking for assistance here is great, but the connecting WASP will be the one you need to communicate with.

But if you guys do have a WASP licence and are developing your own infrastructure, then you should consider a more reliable language. Developing a client app in C# is one thing, but to do a server app that needs scalability, reliability is another thing.


Also you need to be registered with WASPA as at least an affiliate to get a USSD service from a WASP anyway. You need to familarise yourself with WASPA guidelines concerning USSD, failure to do so can lead to hefty fines and termination of your binds.


(Note: My presence on the hub is purely personal and in no way am I here to canvas business for my employer. My comments are from personal experience and are unbiased)
 
cbrunsdonza said:
If your company does not have a WASP licence then your not going to get a USSD bind from the networks. You will have to operate through a WASP then. The WASP will act as a gateway and you connect to their USSD platform.

Asking for assistance here is great, but the connecting WASP will be the one you need to communicate with.

But if you guys do have a WASP licence and are developing your own infrastructure, then you should consider a more reliable language. Developing a client app in C# is one thing, but to do a server app that needs scalability, reliability is another thing.


Also you need to be registered with WASPA as at least an affiliate to get a USSD service from a WASP anyway. You need to familarise yourself with WASPA guidelines concerning USSD, failure to do so can lead to hefty fines and termination of your binds.


(Note: My presence on the hub is purely personal and in no way am I here to canvas business for my employer. My comments are from personal experience and are unbiased)
Click to expand...

Okay, it seems like you have an idea of what I want to achieve. I will ask you a couple of questions:
Is your company a WASP?
When you say a WASP will be the gateway, do you mean they will host our USSD service?
What language do you consider reliable when developing the server side of it?

Thank you for your input
 
I work for a WASP and we handle USSD (you can get a list of WASPs from WASPA).

It really is up to the client to decide what content is hosted by the WASP. If its static content, then usually the WASP does everything, if its dynamic content then usually there is interaction with the clients servers.

On languages, the mobile industry has chosen erlang - for prototyping and small services C# will still scale, its when you need a full production server that has failover and can handle the required hits.
 
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