Hi Daniel
Not sure if already resolved your issue, I had similar problem and found my problem here Limitations and important considerations
If you run two clients that use the same CSF device, contention occurs for that CSF device. This contention
can result in dropped calls, busy tones, or other unpredictable behavior
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"Se você quiser alguém em quem confiar, confie em si mesmo. Quem acredita sempre alcança"
Renato Russo
Cheers
Bruno Rangel
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