Force MC75 to use GMS 900/1800

Hi Team...

Early request for help!

I need to force an MC75 to connect to 900/1800. Now, we can easily do this by enabling the band selection window under settings... but I need to do it from the registry for easy mass deployment.

RemCapture comes up with nothing... can anyone advise if it is possible to achieve this in the registry?

Many thanks!
-JP
Anonymous (not verified)
Hello Jon, I have a script

Hello Jon,

I have a script that will do this and also written a DLL that exposes a couple of functions to do this as well.  There is no registry setting to allow you to configure.
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Kultida Chataru...
Hello Paul, I'm looking for

Hello Paul,

I'm looking for solution for this too. Could you share the script with us please?

Thank you,
Kultida
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Anonymous (not verified)
 Hello Kultida You only

 Hello Kultida



You only need to run the script once to change.

The script uses an AT comamnd


 


    SetVar String strATCmd = "AT^SCFG=\x22Radio/Band\x22, 3, 1"


 


You may need to change the 3 for what every bands you want, 3 (1+2) is


 



1          GSM 900


2          GSM 1800



Values


1          GSM 900


2          GSM 1800


4          GSM 850


8          GSM 1900


16        WCDMA 2100 (BC1)


32        WCDMA 1900 (BC2)


64        WCDMA 850 (BC5)


           127       auto band selection
To set 900/1900Mhz the mask would be 3 (1+2), 850/1800Mhz would be 6 (2+4) 


T he new bands are stored on the flash of the modem so cold boot persistent - so only need to do once.

I have also attached a DLL that exposes some entry points to do the same - Which is not supported either

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Aleksandr Dekhtyar
Script work perfect on MC7596

Script work perfect on MC7596, but for some reason does not work on MC7094. The AT commands should be the same and I am puzzled why it would not work. Who can help please?
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Anonymous (not verified)
The MC70 has a different

The MC70 has a different modem Siemens MC75 - it may not support the command AT^SCFG.  if you collect a debug file from symscript using symscriptwmd.exe it will list the response from the modem. 

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Aleksandr Dekhtyar
Paul, thank you for reply. I

Paul, thank you for reply.
I verified MC75 modem documentation. It does support AT^SCFG the same way as HC25.

I will check the symscript log as you suggested. I may see something there.

Thank you, Alex.
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Herbert De Jong
figured out how it works on

figured out how it works on MC75 Siemens Modems.

see attached SPT file which has code for HC25 Siemens modem and MC75 Siemens modem inside to configure any Band setting on demand.

    // on MC75 modem you need to send Radio Band with quites and 003 values
    // following table explains values from AT command guide MC75 Siemens
    //      “1“ GSM 900 MHz
    //      “2“ GSM 1800 MHz
    //      “4“ GSM 1900 MHz
    //      “8“ GSM 850 MHz
    //      “3“ GSM 900 MHz + GSM 1800 MHz
    //      “5“ GSM 900 MHz + GSM 1900 MHz
    //      “10“ GSM 850 MHz + GSM 1800 MHz
    //      “12“ GSM 850 MHz + GSM 1900 MHz
    //      “15“ all bands
    //      
    //      Radio/Band,rbp, rba  
    //      meaning rbp Preffered Radio bands , rba Allowed radio bands
    //      Also leading 003 values need to be sent for some reason
    //      setting all bands  example    Radio/Band,12,15  will be Radio/Band,00310032,00310035
    //      setting 850/1900   example    Radio/Band,8,12   will be Radio/Band,0038,00310032   
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Aleksandr Dekhtyar
Thank you Herbert. For anyone

Thank you Herbert.
For anyone concerned - please note that "mc75_atc_v00327.pdf" has an error. While it shows the command arguments as decimal value, the MC75 module expect ASSCI coded characters.
12 = 0031 0032


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Anonymous (not verified)
Hello Alex, I have also

Hello Alex,

I have also written the functionality into a DLL for HC25 modem - But like  a script its not supported and we cannot expose the underlying code.

I have attached the DLL and simple document.
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Jarod Fox
The attached document may be

The attached document may be of benefit.
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Don Khan
[HKEY_LOCAL_MACHINE\System

[HKEY_LOCAL_MACHINE\System\State\Phone]


"Cellular System Available"=dword:00000009


 


This will drop the unit down to EDGE.  To revert back to auto negotiate, change the "9" to "0" and merge the registry entry.

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