The loop funcion is as follows (9 pol D-con.)
cable cable cable cable
PC1 tx -> rx PC2 tx -> rx PC3 tx -> rx PC4 tx -> rx PC1
pin 2 3 2 3 2 3 2 3
<-- -------- -------- --------- ----->
Sub D-con Sub D-con Sub D-con Sub D-con
pin 5 ground
So PC1 send to PC2. PC2 rx form PC1. PC 2 send to PC3 and so on.
the last one sends to PC1
Pin 2 = tx
pin 3 = rx
pin 5 is ground
You need a 3 wire cable!
Peter
--
Internet DX-cluster telnet://213.10.48.91
DX-cluster info http://www.pi4cc.nl/dxcluster
Ciprian Sufitchi wrote:
> Excuse my newbie questions, but there are few days until CQWW/CW...
>
> What is -LOOP feature in CT?
>
> As far as I understand, a computer may use only one COM port to be
> connected in network.
> So, in my opinion, if I have 3 computers serial connected (A, B and C),
> it have to work in this way:
> CT-Node A/COM1...........CT-Node B/COM1..........CT-Node C/COM1
> COM2, if available, is free on all computers, even Node B.
> If I am right, how is used COM1 in Node B? The null-modem cable wires
> from A and C are solded on the same pins on COM1, Node B?
>
> In fact, my real application is:
>
> Node A:
> COM1 9600b/s CT Network to Node B
> COM2 N/A
>
> Node B:
> COM1 9600b/s CT Network to Node A
> ?COM1 9600b/s CT Network to TNC (link 1200b/s to Node C)
> COM2 9600b/s serial to an internet computer via HTTPDxCatcher
>
> Node C:
> COM1 9600b/s CT Network to TNC (link 1200b/s to Node B)
> COM2 Radio Link to HF Transceiver
>
> I cannot use Ethernet connection (no cards available) and distance
> between B and C is too long for RS-232. TNC is a must.
>
> 73s de Ciprian YO3FWC
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