If you use a separate SSID for each TNC, then they would not both respond to the same connect reques....~Steve>
Steve McCarter, KB4OID Email: [EMAIL PROTECTED] Website: http://www.kb4oid.org Fort Walton Beach, FL, 32547 > -----Original Message----- > From: [email protected] [mailto:Repeater- > [EMAIL PROTECTED] On Behalf Of Milt > Sent: Thursday, August 02, 2007 9:58 AM > To: [email protected] > Subject: Re: [Repeater-Builder] Re: Connecting Multiple TNCs > > Dan, > > It would seem to me that the issue here would be that the TNC's are not > individually addressable, thus two TNC's listening to a single radio will > both hear the signals from the sending TNC/radio combination and both will > try to act on the signal, unless the sending radio uses two different > speeds, and the two TNCs operate at differing speeds. > > Since you stated that you wish to talk to two different controller serial > ports, why not use a single TNC output to a switch thru which you will > then > connect to the RS-232 device that you wish to talk to. The switch could > be > a DTMF controlled relay setup or could be controlled via the RS-232 > stream. > I have seen the RS-232 controlled setup back in the days of Motorola's > CoveragePlus SMR systems. We dialed a single modem at the site, then > issued > a command to connect to one of 3 or 4 different devices. When finished > with > one connection we disconnected from the device and could then connect to > another. It's been a while since this system was operational but the > concept would be the same as what you are trying to do. > > Milt > N3LTQ > > > ----- Original Message ----- > From: "Dan Blasberg" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Thursday, August 02, 2007 10:22 AM > Subject: Re: [Repeater-Builder] Re: Connecting Multiple TNCs > > > > The only schematics I have seen are for connecting multiple TNC's to > > the serial port on a computer using diodes on the data lines. > > > > If anyone happens across a schematic (That work) for connecting > > multiple TNC's to a radio, I would also be interested. > > > > Dan > > KA8YPY > > > > > > On Aug 2, 2007, at 9:26 AM, Duane Hall wrote: > > > >> I remember seeing the schematics you are talking about, they were > >> over on www.packetradio.com. I cant find them now, but they are > >> probably there somewhere. > >> > >> Duane > >> AB8QU > >> > >> Dave Novotny wrote:Hi Eric, > >>> > >>> I'm not too worried about lots of packets perhaps > >>> interfering/colliding with each other. I have a couple of repeater > >>> sites with two controllers. I want to have remote control of each > >>> controller. I don't want to share the RS-232 side. I'd much rather > >>> share the RF side. The circuit was pretty simple. It used diodes > >>> on the PTT for isolation and resistors to mix the TX audio. I'm not > >>> sure if there was any other control or not. > >>> > >>> Dave > >>> --- In [email protected], "Eric Lemmon" <[EMAIL PROTECTED]> > >>> wrote: > >>> > >>>> Dave, > >>>> > >>>> I'd like to see that article, too. Connecting two TNCs to one > >>>> > >>> radio is > >>> > >>>> easy, but allocating the RX and TX functions between two devices > >>>> > >>> is hardly a > >>> > >>>> trivial matter. Unless a buffer is used to store outbound data > >>>> > >>> while the > >>> > >>>> radio is busy receiving data on the other TNC, collisions will > >>>> > >>> occur > >>> > >>>> regularly. This should be interesting! Is this a good idea? > >>>> > >>>> 73, Eric Lemmon WB6FLY > >>>> > >>>> > >>>> -----Original Message----- > >>>> From: [email protected] > >>>> [mailto:[EMAIL PROTECTED] On Behalf Of > >>>> [EMAIL PROTECTED] > >>>> Sent: Wednesday, August 01, 2007 4:51 PM > >>>> To: [email protected] > >>>> Subject: [Repeater-Builder] Connecting Multiple TNCs > >>>> > >>>> Hi all > >>>> > >>>> Some time ago, I saw an article on how to connect two TNCs to a > >>>> > >>> single > >>> > >>>> radio. Does anyone remember such an article an either have a copy > >>>> > >>> or point > >>> > >>>> me to a site where I can download it? > >>>> > >>>> > >>>> > >>>> Thanks, > >>>> > >>>> Dave, WA6IFI > >>>> > >>>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> Yahoo! Groups Links > >>> > >>> > >>> > >>> > >>> > >>> > >> > >> > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > Yahoo! Groups Links > > >
