> Wouldn't that be the cat's meow? Physically they look ideal: rj45 jack on > one end, bnc male coupling on the other. And they're small and not too > expensive (in the $5 range).
I checked with one of our suppliers, they're not suitable and the supplier who claimed there were is lying. This is confirmed by: > HB-100-1 3270 MALE coax to RJ45 PINS 4 & 5 > HB-100-3 3270 MALE coax to RJ45 PINS 3 & 4 Twisted-pair Ethernet uses four wires (two pairs) so these aren't useful. Sorry about that, was confused by some sales literature that arrived yesterday. > This thing actually sounds more like what I understand a "bridge" to be: > for joining together LAN's (in this case a coax LAN with a UTP LAN). Do I > really need something like this to use this card I've found? Well, that's what you'd use a small hub with both 10baseT and 10base2 connections as; it bridges the two networks. > I don't quite understand the part about the pins, and why it lists only 2 > pins in each case, while UTP has 8 wires. Cat5 has four pairs (Cat3 only three?), of which two pairs are used for Ethernet; the other two are free, but unused due to crosstalk officially. > But the rj45 cable got me thinking of something I'd earlier considered - > splicing into the cable and trying to hack in a UTP cable. Unless you knew the pinouts, I doubt it's be a good idea I'm afraid; best either to pick up another card or look for the correct dongle or lead, like that one you linked to. > The card has 22 pins where the cable plugs > in: I can't logically reduce that to the 8 wires typically found in UTP. > Anyone have any ideas on that? It could be reduced to four (TX/RX signal, ground and signal for 10base2), but it's more likely got 8 pins for the 8 wires in UTP, 2 for the signal and shield on the BNC, various other pins to sense which dongle/cable is plugged in and active, and perhaps signals to drive activity lights if the card can use a dongle with LEDs and other connectors etc.. It might have enough room for the active pins in an AUI port too, but I've never seen a PCMCIA Ethernet card that can drive an external transceiver like that. Regards, Ben A L Jemmett. (http://web.ukonline.co.uk/ben.jemmett/, http://www.deltasoft.com/) To unsubscribe from SURVPC send a message to [EMAIL PROTECTED] with unsubscribe SURVPC in the body of the message. Also, trim this footer from any quoted replies. More info can be found at; http://www.softcon.com/archives/SURVPC.html
