I thought it wasn't possible, but worth to confirm! I'll have to find a workaround. Thanks Michael. On Thu, Mar 2, 2017 at 3:00 PM, Michael Jerris <mike@jerris.com> wrote:

There is not a way to do that on a per call basis.

...

On Mar 2, 2017, at 5:55 PM, Joel Serrano <joel@gogii.net> wrote:

Hi all,

I know you can set the upper/lower RTP port limit in autoload_configs/switch.conf.xml but, is it possible to have an upper/lower limit set and change it for a specific call?

For example:

switch.conf.xml has:

<param name="rtp-start-port" value="16000"/> <param name="rtp-end-port" value="32000"/>

We have certain clients that require a VPN connection to reach our servers, and the VPN blocks all UDP traffic from ports >10000.

One solution would be of course just to lower our range, ok... But is there a way that I can set the RTP port range for a specific call?

Something like this in diaplan:

[...] <action application="set" data="rtp-start-port=3000"/> <action application="set" data="rtp-end-port=4000"/> [...]

I don't know if this is doable some way... If FS doesn't have this option, maybe with a Kamailio + rtpengine in front we could potentially achieve this?

Thanks!

Best regards, Joel.

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