Hello Patrick, Thanks for the explanation, however I'm not sure how simply reversing the pin-outs will improve cross talk.
The Alvarion VL Manual doesn't specify the function of each Pin/Wire color. I assume Green & Orange pairs are still used for Data and the Blue & Brown pairs are used for power? If so, it appears Alvarion has simply inverted the pin out starting the standard 568A color code with Pin 8 rather than Pin 1. I'd love to learn more as to how starting with Pin 8 as opposed to Pin 1 would make any difference as it relates to cross talk. Alvarion VL Manual page 168: 1 Blue 2 Blue/White 3 Orange Data? 4 Brown 5 Brown/White 6 Orange/White Data? 7 Green Data? 8 Green/White Data? Vs. The rest of the World aka 568B: 1 Orange/White Data 2 Orange Data 3 Green/White Data 4 Blue 5 Blue/White 6 Green Data 7 Brown/White 8 Brown BTW, I stumbled across a pretty nifty URL with a business card sized PDF Avery Stock printout of 586A & 586B pin out configurations. http://www.bluemax.net/techtips/networking/Wiring_Tips/Wiring100TX/colorcode standards.htm Best, Brad -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tom DeReggi Sent: Friday, January 05, 2007 8:17 PM To: WISPA General List Subject: Re: [WISPA] Brad B,I got your answer on the pinout for BreezeACCESS VL Patrick, That is good to know, that there was actually technical merit, "brains", behind the decission to do it Alvarion's way. I think whats more important from this is that anyone installing VL, and needing to extend the cable longer than the cable included with the unit, probably then also needs to wire the new longer cable or extenstion cable with the same pinout. I bet many had attempted to use a 568B extension with a coupler to the Alvarion cable, if they were not aware of this. The cable length that comes with it is probably fine for Residential, but for MTU's 150-300ft is not uncommon. What is the cable limit for Alvarion's CAT5 connection? Now to give you a hard time.... Why does the Alvarion use 56V instead of standard 48V, 24V, or 802.11af? :-) Tom DeReggi RapidDSL & Wireless, Inc IntAirNet- Fixed Wireless Broadband ----- Original Message ----- From: "Patrick Leary" <[EMAIL PROTECTED]> To: "WISPA General List" <[email protected]> Sent: Friday, January 05, 2007 3:55 PM Subject: [WISPA] Brad B, I got your answer on the pinout for BreezeACCESS VL So Brad, I finally have the answer as to why we do not use the standard 568B (or 568A for that matter) pinot. We can't. The VL PoE pushes 55 volts and ½ an amp up the cat 5 cable. If the standard pinout is used the cable range due to cross talk can't make it much past 30 feet. With this pinout we are able to maintain the long distance. So, you may not like it, but at least I've finally been able to give an actual reason. Regards, Patrick Leary AVP WISP Markets Alvarion, Inc. o: 650.314.2628 c: 760.580.0080 Vonage: 650.641.1243 [EMAIL PROTECTED] **************************************************************************** ******** This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses. **************************************************************************** ******** -- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
