On Jan 22, 2010, at 3:28 PM, Nate Duehr wrote:
On 1/22/2010 4:03 PM, Neil wrote:
Wouldn't it be nice if say, a group of people around the country
(or world even), could put a special call in the UR field and
everyone in that group would have their traffic automatically
routed to all the other members, bit like a multicast I suppose,
but not much fun if the local repeater was already in use.
(That's where G3 'could' come in handy, sending a message instead
to the members radio on that repeater, underneath the QSO without
hindering the other users...then you could switch to another
repeater/node and continue.)
I suppose you could subscribe to a 'multicast group', something
like a reflector that handles instantaneous multiple connections.
Food for thought...
73 de Neil G7EBY
The commercial digital world calls this "talk groups" and has had it
for at least a decade.
An Amateur talk group system would need to come up with a way to
"self-register" with a particular talk group.
Could be done. Interesting concept.
Nate WY0X
Once we have an open source gateway, its pretty easy. My
understanding is that the RP2C sends any transmission with something
in RPT2 to the gateway (doesn't have to just be "call G" --- there
are a couple of syntax that could be used.
UR: TG00000R (Register)
MY: K7VE
RPT1: NW7DR (Module number isn't required by the protocol, but may be
required for RP2C)
RPT2: GATEWAY
With UR:TG00000U (UnRegister)
The gateway would have a list of active talkgroups and register itself
to the talkgroup server (like a reflector) for two way transmission
relay -- no need for a "link"
Another syntax:
UR: xxxxxxxx (usually CQCQCQ or -------U to Unregister)
MY: K7VE
RPT1: NW7DR
RPT2: TG00000 (Gateway will register for talkgroup if not already
registered, keep a list of local callsigns in the group and unregister
when the last sends the unregister or times out)
Arbitration of multiple talk groups on a single repeater frequency is
the main downside.
John D. Hays
Amateur Radio Station K7VE
PO Box 1223
Edmonds, WA 98020-1223 VOIP/SIP: j...@hays.org
Email: j...@hays.org
