man-in-the-middle

Unanswered Question
Jul 16th, 2007
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Hi;

We have a serious problem with our ip telephony system. Sometimes; when someone tries to call outside world over FXOs, he gets in another call that goes on between two people(another call over FXOs). Then all the connection is lost. Problem is only observed with FXOs. Any problem was not observed with inside calls.

Any idea or experience?

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paolo bevilacqua Mon, 07/16/2007 - 00:11
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What is your gateway to pstn? Router model and exact IOS version ?

yatisspor Mon, 07/16/2007 - 00:24
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Gateway is 2811. IOS is c2800nm-ipvoicek9-mz.124-11.T.bin


We are using CM 4.1(3)sr4d



paolo bevilacqua Mon, 07/16/2007 - 00:58
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Can you upgrade to 12.4(11)T3 that has many bug fixes for voice ?

Are you using H.323 or MGCP to the CCM ?

paolo bevilacqua Mon, 07/16/2007 - 02:55
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Suggest that you upgrade and if the problem persist you will need to take some traces for further troubleshooting.

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