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[wrong post]E1R2 to FXS problem

hi, i have simulation, the setup is like this :

phoneA -- Switch -- E1R2 -- AS5350 -- 1750 -- FXS -- phoneB

problem:

- When phoneA call phone B, the phone B ring. If the phoneA is down, the phoneB keeps ringing.

I think, this problem similar to FXO Disconnect Supervisor. But i thought that R2 could handle the disconnect supervision well.

I also has already check the cptone for the voice port.

Anyone can help?, thank a lot

** Sorry, looks like i posted in the wrong section, should be in the voip

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