Brian;
In general VOIP as an audio link is not very stable if you
do not control the bandwidth loading of the Link. There are
technologies like TDM over IP that have much less jitter and dropout
issues.. but it still is reliant on the IP link being stable and not
overloaded as well as not interfered with.
VOIP is essential not going to be very real time and as a udp
protocol is not very error correcting...The delays and dropouts may
or may not be worth your effort...
<http://allstarlink.org/> these folks have a network application
which could serve your needs.. but inherent system delays may still
be more than you are willing to use on a repeater..
There generally is no provision for voting multiple
receivers in any technology based on IP besides TDM over IP.. and
that requires good link bandwidth controls..
The allstarlink IP based repeater controller is pretty cool. I am
building a node at one of my sites.. but linking is subject to network delays..
Doug
KD8B
At 10:42 AM 3/9/2009, you wrote:
>My repeater group is considering building split-site 6m machine. As
>an inter-site link, I was thinking of using some sort of VOIP
>arrangement via the internet. I'm curious if anyone has tried
>something like this:
>
>My idea is to use a point-to-point, private link (i.e. not IRLP or
>Echo) to pump audio and maybe even some signaling between sites. The
>receive site would consist of the receive radio, controller (most
>likely an Arcom), and a PC to do the encoding/streaming. The
>transmit site would consist of a PC to decode the audio stream, a PL
>decoder for TX logic, and the TX radio. The basic premise would be
>to take audio from the RX (PL filtered), fed thru the controller,
>mixed with link PL, and fed to the PC's audio input. The PC then
>streams the audio over the internet to the RX site PC, where it is
>decoded and fed to the TX radio, which will be keyed by a PL decoder
>(provided the IP encode/decode process hasn't mangled the PL).
>
>Whew... Now, question is: will it work? Or more properly, has anyone
>made this work? I'm going to try it on a small scale just to prove
>concept, but I'm curious if anyone has tried this already. My
>intention is to use something along the lines of Winamp with
>Shoutcast or Windows Media Encoder to stream the audio. I'd rather
>find a Linux-based CLI encoder if such an animal exists. I had
>thought about using IRLP nodes as endpoints, but IRLP policy would
>preclude that.
>
>Thoughts? Encouragement? FTW is he THINKING?!?! ;) I'd be interested
>in the group's thoughts, and I'll report the results of my experiments.
>
>Thanks & 73,
>Brian, N4BWP
>
>
