[Asterisk-video] video prompts via Asterisk

[Olle E Johansson]

28 nov 2006 kl. 15.42 skrev Bruce Bauman:

> If a videophone is behind a NAT, the firewall will often timeout the
> bindings after a small amount of time and Asterisk will be unable to
> send video to the phone.
>
> Has anyone encountered/solved this problem? How do you keep the RTP
> stream open during periods of inactivity?

There's something called RTP keepalives that some devices use.
You need to send at least every 29th sec...

What it really is, is something for others to discuss. With newer  
devices
you could send STUN requests on the RTP port - you certainly have to
be ready to receive them (the new SIP outbound draft).

/O