i think you make wrong way to do load default, pls try step by step as :
- switch the button to init (the red led will slow flash)
- press Reset button (the red led will fast flash)
- switch the button to normal and waiting, the system will off led in all cards and reading SDcard for load...
I see this is dial outgoing call right, maybe User delay long time when dial number the pabx will timeout receive dial number, you can checking again many times with short time when dial.
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