i have made 50 meters with no shielding of rj45, works fine. who cares for some retransmissions. its not like u'd notice ;) also, if u are so concern, i also made 190meters with a coax rj-11 which connected 2 hubs, works great. (though a bit expensive) i have in my home 30m regular home phone cord + 25m both unshielded. move near the tv, 2 computers, outside, back again thru a makeshift ezolirband. np. one thing though, try not to mix different materials in the cable because this will deffinetly be a pain and may not work above 15 meters.
p.s: as for the lightning, if u have that kind of problem i suggest not sticking your hand outside your home when its raining.;) * - * - * Tzahi Fadida [EMAIL PROTECTED] Fax (+1 Outside the US) 240-597-3213 * - * - * - * - * - * -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Ira Abramov Sent: Tuesday, January 29, 2002 6:45 AM Cc: [EMAIL PROTECTED] Subject: Re: How important it is to a have shielded Ethernet cables for out of the building usage? On Tue, 29 Jan 2002, Shaul Karl wrote: > Can you express your view on the subject and/or give some online > pointers? I have a 10 meter cable hanging between two bedrooms outside the window to my flatmate's room. all packets that pass on it are garbled for 1-1.5 seconds whenever the washing machine it passes next to starts or breaks its electric motor (tested with ping -f). I would imagine the same would happen with air conditioners etc. also by hanging outside it's more exposed to static electricity during storms, which could add DC to the line and kill one or both of our NICs. I have had my machine getting frozen during a thunderstorm already, by thhis line or by the ADSL, I would not know. whis is cat3 STP, and it probably deserves cat5. > In particular, I plan to put an Ethernet cable between 2 apartments > such that it will path in parallel to the cable TV outside of the > building. There fore, in addition to possible cross talk with the cable > TV, what about the danger of a lightning hitting the cable? cable is ok. you can even wrap one around the other. just remember to earth it well, and use cat5, given the choice. > cross talk between the cable TV and the Ethernet cable? not an issue. the electric field generated would not be nearly strong enough to bug the netcable, that's my guess. > As far as I can tell the phone (Bezeq) lines that are going from each > apartment to the building's central phone box are unshielded even with > old building where Bezeq needs to have them path on the outer walls of > the building. Am I right about these cables being unshielded? If yes, > what about protecting the phone equipment from lightnings? bezek is unshielded, and the lightning they may catch is usually not the bit ON your buildings, but the bits hanging freely in the street. you have enough grounded antenae and water tanks on the roof for the lightning to choose from, I doubt it would attack your building sideways. you SHOULD fear stastic elec, though, like I said. during storms especially. -- Santa's little helper Ira Abramov ================================================================= To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED] ================================================================To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
