h.323 gateway behind NAT

Unanswered Question
Dec 14th, 2007

i configued h.323 gateway (gateway is connected PSTN through FXO) behind internet NAT router and try to call that gateway from a softphone through internet. the dialed PSTN no is ringging but no voice for both ways. Pls refer the attached configuration. Is this a problem with NAT translation?

Thanks in advance!

I have this problem too.
0 votes
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Loading.
dgahm Fri, 12/14/2007 - 09:59

Yes, you need a version of IOS that has NAT ALG. What IOS are you running?

NAT with ALG can translate the embedded addresses in H225/H245.

Cisco IOS NAT Application Layer Gateways

http://www.cisco.com/en/US/tech/tk648/tk361/technologies_white_paper09186a00801af2b9.shtml

http://www.cisco.com/en/US/products/ps6441/products_configuration_guide_chapter09186a00807819ce.html

Please rate helpful posts.

Dave

Actions

This Discussion