<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><P>hi</P>
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<P>design : ccm 4.1.3 have 2 ip address one private and the other one public.</P>
<P>private ip is behind the firewall.</P>
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<P>i gave public ip address to CCM for 2nd ethernet and putted the beyond the firewall .also I added a new h323 gateway for voip service provider's h323 gateway .</P>
<P>when i try to make a call from voip provider's backbone the remote side ringins but there is no audio ,</P>
<P>because there is no rtp stream from my ip phone. Because ip phones have private ip</P>
<P>so is it ok if i nat the ip phones on my internet router?</P>
<P>also i read a documents related to Service Provider PAT Port Allocation Enhancement for RTP and RTCP and session border control ..</P>
<P>how to i nat ipphones . </P>
<P>can i use the config example in the document below in my INTERNET router?</P>
<P><A href="http://www.cisco.com/en/US/products/ps6640/products_white_paper0900aecd80597bc7.shtml">http://www.cisco.com/en/US/products/ps6640/products_white_paper0900aecd80597bc7.shtml</A></P>
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<P>thanks a lot</P>
<P>Gokhan</P>
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