[*] Re: [on-asterisk] Generating RTP broadcast packets

[John Lange]

On Fri, 2006-05-05 at 13:31 -0400, Simon P. Ditner wrote:
> That looks interesting... poking through the SPA-9000 manual, there are a
> couple of corrections to your information:
> 
>  - The multicast RTP port is 224.168.168.1:34567
>  - The multicast signalling port is 224.168.168.1:6061

Ah, interesting! I assumed there was no signalling. I got my info from
the phones web interface, not the 9000.

> netcat (nc on most systems) is a fun tool, you could likely use it to
> replay captured RTP streams, but I don't know what you'd do about
> signalling the phones to tell them there's a paging message they should
> be listening for.

Well now that I know signalling is required that changes what I had in
mind.

> Does anyone have an SPA-9000 we could do a packet capture on?

We have a 9000. I'll try and setup a test environment and do a packet
capture. Its a bit of a pain because the 9000 reconfigures all the
phones which makes them stop working in our regular environment but it
would be worth it to figure out whats going on.

> 
> Cheers,
> spd
> 
> On Fri, 5 May 2006, John Lange wrote:
> 
> > The Linksys SPA line of phones (941, 841, 942 etc) all support paging
> > using a RTP multicast address "224.168.168.168:6061".
> >
> > Beyond that I don't have much technical detail on how this works.
> >
> > I assume that if you send RTP packets out to that multicast address the
> > phones will see them and send them to the speaker of the phone.
> >
> > As far as I'm aware this is not currently supported in Asterisk.
> >
> > Does anyone have any suggestions as to how to generate RTP packets to
> > test if we can get the phone to work with paging?
> >
> > --
> > John Lange
> > OpenIT ltd. www.Open-IT.ca (204) 885 0872
> > VoIP, Web services, Linux Consulting, Server Co-Location
> >
> >
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-- 
John Lange
OpenIT ltd. www.Open-IT.ca (204) 885 0872
VoIP, Web services, Linux Consulting, Server Co-Location