I cannot make a data call | Telit Cinterion IoT Developer Community
June 26, 2015 - 1:42pm, 11417 views
Hi everyone!
I want to make data calls to read smart meters connected with other GMS modems. I'm new with these kind of communication, and I need help. Because when I tried with all the numbers I've got, I always get "NO CARRIER" as response and the detail error (AT+CEER) gives me the code of the "Bearer capability not authorized".
Here I let you an example of what happens to me and my modem configuration. If you need something more let me know. I couldn't copy the text because the program that I use doesn't let me, but with the image, I think, is enough.
Thanks!
Hello,
It looks like you are trying to establish a direct CSD connection to other module or some access point.
First thing I have is that CSD may be no longer supported by some operators because GPRS offers better bandwidth and is used by most users. Or the CSD access point is no longer working. Other thing that can matter is that the module is in roaming according to your log. If it is supported maybe you should try with other CBST settings. Please also check if 0034 prefix is OK with your operator, maybe there should be +34.
You didn't write what kind of module you are using - I can only see that it is probably 2G module.
Regards,
Bartłomiej
Hi!
My module is a BGS2T RS232 and it supposed that the other access points works, at least, I was told that.
I saw that it is in roaming, how can that affect the connection? I though that it only means I must use the prefix (I tried both options 0034 and +34, neither of both work).
I'm going to ask if my operator didn't support CSD and changing the CBST settings. I'll tell you how it goes.
Thanx for answering!
Carolina
Hi,
I'd start from testing in the home network. The CSD might not be supported in the visited network.
Regards,
Bartłomiej
Finally I could test it with another BGS2T, and neither it works. Firstly, I want to apologize me, because I'm a complete newbie and I think that I don't understand how to configure the GSM to data calls.
Secondly, I realized that I don't activate the PDP context properly. I defined the PDP context as my MNO told me and I tried to with ADT*99***1#, ADT*99**PPP*1#, ADT*98#... but the context is not activated.
I also tried to create a connection and a service profile. Although I had some problems...
^SICS: 0,"conType","CSD"
^SICS: 0,"calledNum",""
^SICS: 0,"dataType","1"
^SICS: 0,"alphabet","0"....
First problem: I read at the documentation that for CSD is mandatory the conType, calledNum and the dataType. But I don't know what does calledNum means. At the documentation says "Called BCD number", but I still don't know what to put there...
Thank you very much for your help!
Hello,
as mentioned before most MNOs remove/limit CSD capabilities of there networks due to costs. Almost no GSM network suppot ANALOG protocol anymore.
Please have a try and use the digital protocol.
Set this by AT+CBST=71 (V110) or try ATDI instead of ATD
Cheers
Markus
....
I started out with nothing... I still have most of it.
...also the AT+CEER reponse hint to a not suppored bearer protocol.
....
I started out with nothing... I still have most of it.
I did both, I changed to 9600 (V110) and call with ADTI instead of ATD. But I'm not near the solution. As I put at Bartłomiejs comment
Hi everyone,
I found that I have a password in every connection profile, which I don't know. I tried to change it with the command AT^SICS=0,passwd,"", but I couldn't (I didn't think it could works, I just tried).
Do you know how to change it? Or could you let me know if it's important for my communication.
On the other hand I asked for an other BGS2T, but I don't have it all ready. Is there other way to try a data call in local, meanwhile I receive the other?
Thank you all for your answers
Hello,
The password is always masked with asterisks when displayed even when you set empty "".
When you configure CSD as conType the default parameters are set. The user and password are not set. Please check the AT command specification for more details.
Regards,
Bartłomiej
Thanks for the clarification, I supposed it later but I wasn't sure.
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