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New Member

man-in-the-middle

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?

5 REPLIES
Hall of Fame Super Gold

Re: man-in-the-middle

What is your gateway to pstn? Router model and exact IOS version ?

New Member

Re: man-in-the-middle

Gateway is 2811. IOS is c2800nm-ipvoicek9-mz.124-11.T.bin

We are using CM 4.1(3)sr4d

Hall of Fame Super Gold

Re: man-in-the-middle

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 ?

New Member

Re: man-in-the-middle

we use h.323

Hall of Fame Super Gold

Re: man-in-the-middle

Suggest that you upgrade and if the problem persist you will need to take some traces for further troubleshooting.

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