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Check for dialtone before dialing  

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Shieldwolf
(@shieldwolf)
New Member
Joined: 8 months ago
Posts: 2
04/11/2019 9:59 am  

I am using a Digium TDM400 card to connect to existing telephone lines.   If a old standard phone is connected on the same lines, I encounter a problem.   When dialing through the pbx, the line is never checked for a dial-tone before it starts to dial, sending the dialing number into the middle of the existing phone call.   Is there any way I can detect that the line is already in use and/or check for dialtone before dialing?


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