[asterisk-users] Odd issue CentOS 7 vs Ubuntu 20.04

[Jerry Geis]

>The usage of D(15) causes Asterisk to produce RTP on its own. Without it,
>it merely forwards RTP. If a NAT/firewall requires media to be sent before
>allowing media in, then you'll have no media flow. You can use the
>"rtpkeepalive" option to have the RTP stack produce keepalive packets,
>which will then open the NAT/firewall.

-- 

Hi Josh -

Thanks - I have also turned off the firewall with "systemctl stop
firewalld".
Did not make a differernce.

I am not at the site to change the to rtpkeepalive - will try that monday.

Jerry
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