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Blocking of voice data

We have IP telephones which are installed at near end and Far end. Whenever we call our voice data will be blocked at firewall(Symanted SGS 5420 firewall) at both end. Can u please tell what changes require in our firewall parameter to fix this problem?

Thanking you.

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  • Imre Vetro May 11, 2010

    Try figuring out wich port those phones are using and open it up on the firewall.

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  • 73 Answers

1. Make sure you have proper accesslist to permit the voice traffic to pass through the firewall on both the end

2. Enable Application Layer Gateway

Posted on Mar 17, 2009

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