Awesome, i got some single mode LC LC fiber off monoprice, sounds like i should be all set for this. Thanks for everyones info
- Jon On Thu, Jan 26, 2012 at 6:24 AM, Pierre-Yves Maunier <na...@maunier.org>wrote: > 2012/1/26 David Storandt <dstora...@teljet.com> > > > You can put a 3dB or 5dB optical pad on the link if the receiver can't > > handle zero-distance optical power. > > > > We're using SFP LX for a couple of years even in back to back configuration > for equipments within the same rack with a 1 meter patch cord without any > problem. > > Max TX is -3dBm, Max RX sensivity is -3dBm so there is no problem. > > 1. I don't think I've ever had a LX SFP that TX at -3 dBm, they're usually > around -5 to -7 dBm. > > and example in a live router : > > pymaun...@re1.tcr1.rb.par> show interfaces diagnostics optics ge-7/3/* | > match "Laser output power " > Laser output power : 0.3160 mW / -5.00 dBm > Laser output power : 0.1800 mW / -7.45 dBm > Laser output power : 0.2600 mW / -5.85 dBm > Laser output power : 0.3210 mW / -4.93 dBm > Laser output power : 0.3070 mW / -5.13 dBm > Laser output power : 0.3200 mW / -4.95 dBm > Laser output power : 0.3180 mW / -4.98 dBm > Laser output power : 0.3140 mW / -5.03 dBm > > 2. You can assume a patch cord add between 0.2 to 0.5 dB of attenuation so > even with a SFP TX at -3dBm, you won't receive at the Max RX sensitivity. > > -- > Pierre-Yves Maunier >
