CMS Error 28

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sam bell
New member
Username: Tzkv2n

Post Number: 1
Registered: 02-2004
Posted on Tuesday, February 17, 2004 - 11:20 am:   

Hi,
I am getting the above error when I try to send a PDU SMS message via a siemens TC35 terminal, however when I try to send a message with the same sim via my mobile it works fine.
Any ideas what I might be missing?
Bryce Norwood - NowSMS Support
Board Administrator
Username: Bryce

Post Number: 1895
Registered: 10-2002
Posted on Wednesday, February 18, 2004 - 05:53 pm:   

CMS Error code 28 means "Unidentified subscriber:
This cause indicates that the subscriber is not registered in the PLMN (i.e. IMSI not known)."

That is a very odd response code to get returned. My only guess would be the SIM card is not inserted properly (what happens if you don't have a SIM card inserted ... I've never tried it with a TC35).

Basically, it sounds like the SMSC does not know who you are. But I can't think of what else would cause this.

-bn
sam bell
New member
Username: Tzkv2n

Post Number: 2
Registered: 02-2004
Posted on Thursday, February 19, 2004 - 09:34 am:   

I think the sim is inserted ok, without it the cmgs message fails. It is confusing me because all the +CREG messages say that I am registered.
Bryce Norwood - NowSMS Support
Board Administrator
Username: Bryce

Post Number: 1927
Registered: 10-2002
Posted on Friday, February 20, 2004 - 11:56 pm:   

Assuming you are trying to do this with your own code ... can you send a message using text mode instead, or does it also report an error?

If the problem only shows up in PDU mode, I wonder if there is a problem with the SMSC parameter in the PDU?

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