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Author Topic: SMS in 8-bit format  (Read 201 times)
maunix
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« on: August 01, 2007, 19:48:01 UTC »

I have a strange problem. I've been using SMS messages for almost 3 years. A couple of weeks ago "something" happened with a Sony GM48 modem , a problem that i cannot figure out how to solve.

I send 8-bit messages, using the Data Coding Scheme 04; that is DCS=4   

I tried setting it with the CPMS command in TEXT MODE. That is using
AT+CPMS=17,167,0,4

and then sending the message in TEXT MODE but the data is in 8-bit format.

I also tried sending a message in PDU mode (setting the field DCS=04) as I always been using, and I have the same problem.

I don't know the reason but the messages arrive as the 'ASCII' representation of the Hexadecimal data I sent.

For example , if I send

4041

I get

AB

Which are the ascii representation for 40h and 41h codes, the message comes with DCS=00

I replaced the modem but the problem persists. I talked with the Service Provider and they tell me that they didn't change anything, that they still support 7-bit and 8-bit modes

┐Is there a command or something that I can use to fix this out? I dont know If that 'something' happened in the Modem or in the Flash Chip. Changing the chip didn't solved the problem, neither changing the modem.

Im really confused.

┐Any hints?

Thanks in advance.
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