Re: [WISPA] Optoisolator for Ethernet?
How weird. We need exactly this too. A building we're in that used to be two, but were combined, and each have their own service drops. There's a difference in ground potential. On Sun, Mar 14, 2010 at 6:30 PM, Greg Ihnen os10ru...@gmail.com wrote: I've seen a telephone (copper pair) optoisolator which had a short piece of fiberoptic cable inside. Each circuit on both sides of the cable had their own highly isolated power supplies. This was the only thing that worked in the Amazon region to stop phone equipment from getting wiped out during the intense electrical storms. The beauty of this device was it didn't require a first class ground system to work, in fact it didn't require any ground. A ground would just present up a difference in potential between the phone line and ground and encourage destruction. The telco side of this thing would just float at what ever potential the telco's lines were presenting and the on site equipment on the other side of this thing never saw that potential. Has anyone seen such a thing for Ethernet? Greg WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] Optoisolator for Ethernet?
We use two fiber transceivers and a jumper on our ethernet when we want to have electrical isolation. On Sun, Mar 14, 2010 at 6:30 PM, Greg Ihnen os10ru...@gmail.com wrote: I've seen a telephone (copper pair) optoisolator which had a short piece of fiberoptic cable inside. Each circuit on both sides of the cable had their own highly isolated power supplies. This was the only thing that worked in the Amazon region to stop phone equipment from getting wiped out during the intense electrical storms. The beauty of this device was it didn't require a first class ground system to work, in fact it didn't require any ground. A ground would just present up a difference in potential between the phone line and ground and encourage destruction. The telco side of this thing would just float at what ever potential the telco's lines were presenting and the on site equipment on the other side of this thing never saw that potential. Has anyone seen such a thing for Ethernet? Greg WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] Optoisolator for Ethernet?
That sounds expensive. I wonder if that would help in where there's rf problems like at high power broadcast colo's Greg On Mar 14, 2010, at 10:11 PM, Philip Dorr wrote: We use two fiber transceivers and a jumper on our ethernet when we want to have electrical isolation. On Sun, Mar 14, 2010 at 6:30 PM, Greg Ihnen os10ru...@gmail.com wrote: I've seen a telephone (copper pair) optoisolator which had a short piece of fiberoptic cable inside. Each circuit on both sides of the cable had their own highly isolated power supplies. This was the only thing that worked in the Amazon region to stop phone equipment from getting wiped out during the intense electrical storms. The beauty of this device was it didn't require a first class ground system to work, in fact it didn't require any ground. A ground would just present up a difference in potential between the phone line and ground and encourage destruction. The telco side of this thing would just float at what ever potential the telco's lines were presenting and the on site equipment on the other side of this thing never saw that potential. Has anyone seen such a thing for Ethernet? Greg WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] Optoisolator for Ethernet?
On 14 March 2010 23:05, Greg Ihnen os10ru...@gmail.com wrote: That sounds expensive. I wonder if that would help in where there's rf problems like at high power broadcast colo's Not terribly expensive. http://www.google.com/products?q=100base+fx+media+converterspell=1oi=spell WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] Optoisolator for Ethernet?
We have done fiber to ethernet converters on FM towers. The telephone option you spoke of earlier was most likely DC powered which would be much more isolation. We do 1 FM tower where 100 meg ethernet would not link. Had to have power to power the ethernet to Fiber converter at top but it allowed for 100 meg transmission up the tower. Justin -- Justin Wilson j...@mtin.net CCNA CCNT Mikrotik Advanced http://j2sw.mtin.net/blog From: Greg Ihnen os10ru...@gmail.com Reply-To: WISPA General List wireless@wispa.org Date: Sun, 14 Mar 2010 22:35:18 -0430 To: WISPA General List wireless@wispa.org Subject: Re: [WISPA] Optoisolator for Ethernet? That sounds expensive. I wonder if that would help in where there's rf problems like at high power broadcast colo's Greg On Mar 14, 2010, at 10:11 PM, Philip Dorr wrote: We use two fiber transceivers and a jumper on our ethernet when we want to have electrical isolation. On Sun, Mar 14, 2010 at 6:30 PM, Greg Ihnen os10ru...@gmail.com wrote: I've seen a telephone (copper pair) optoisolator which had a short piece of fiberoptic cable inside. Each circuit on both sides of the cable had their own highly isolated power supplies. This was the only thing that worked in the Amazon region to stop phone equipment from getting wiped out during the intense electrical storms. The beauty of this device was it didn't require a first class ground system to work, in fact it didn't require any ground. A ground would just present up a difference in potential between the phone line and ground and encourage destruction. The telco side of this thing would just float at what ever potential the telco's lines were presenting and the on site equipment on the other side of this thing never saw that potential. Has anyone seen such a thing for Ethernet? Greg WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
