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New Member

VoIP problems

Hi

We have a E1 on Cisco3640 and router WAN Cisc3640 doing NAT. The VoIP in this scenario works fine, but after, we change the router WAN to Cisco 7604 but now we get voice in one-way. We're checking the E1 and there is not problem. What should we check?? Many thanks.

5 REPLIES
Hall of Fame Super Gold

Re: VoIP problems

You should check respective IOS versions and configuration.

New Member

Re: VoIP problems

If we move E1 to DMZ network it works even using cisco 7604.

Hall of Fame Super Gold

Re: VoIP problems

May be a difference due to some NAT behavior or bugs in different version. Without more details, is impossible to tell.

New Member

Re: VoIP problems

check ACL both sides

New Member

Re: VoIP problems

I remove them but the problem is still there.

Thanks

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