In the KISS mode, here is a simple solution that can be used for a trial. At
the receiver site, use a PL decoder to gate audio into a SKYPE port on the
computer at the receive site. Audio would only be present if the receive
signal had the proper tone present.
At the transmit site, use a SignalLink USB port on SKYPE to feed audio and PTT
(COS) to your controller. Put the controller at the transmit site and feed the
SignalLink audio and PTT signals to the controller in place of the normal
receive signals.
SKYPE does not need a PTT signal to activate the audio into the system. The
system is full duplex, and audio from the receive site is active all the time.
The PL at the receiver controls the audio input.
At the transmit site, the SignalLink recovers the PTT using a VOX circuit with
front panel adjustments to supply the COS input to your controller of choice.
Use a control receiver at your transmit site to feed control DTMF signals to
your controller using a frequency of 220 or above for a legal system.
SKYPE does have the usual encode/decode delay, but does not have the UDP
routing problem. All signals are TCP/IP in the SKYPE system.
73 - Jim W5ZIT
--- On Mon, 3/9/09, Ethercrash <n4bwp...@charter.net> wrote:
From: Ethercrash <n4bwp...@charter.net>
Subject: [Repeater-Builder] Split site link via IP
To: Repeater-Builder@yahoogroups.com
Date: Monday, March 9, 2009, 9:42 AM
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
