[Asterisk-Users] Open Ports

[Rich Adamson]

> > Cisco phones use udp ports 16384-32776, while Xlite uses something like
> > udp ports 8000-8050, and Polycom phones use another range, etc. If you
> > worked for a large company that didn't have any sip phone standards and
> > you had to open everything that _could_ be used for rtp, then you really
> > would be opening a hugh number of udp ports. At least some of those ports
> > have other uses.
> 
> Thank you all for the insights and explanations. May I ask is it 
> possible to fix the SIP phones to a specific range? I guess there will 
> be options in the configuration menu to override to factory UDP port range?

On most phones, yes it is possible. Don't be too tight with the number
of ports. Give the phone maybe a range of 50 ports or something, keeping
in mind that if udp port 12345 happens to be used by DNS (or whatever)
and 12345 is in your range for rtp, then rtp won't use that port if it
is in use by something else.