nanog mailing list archives
Re: LX sfp minimum range
From: Gary Buhrmaster <gary.buhrmaster () gmail com>
Date: Thu, 26 Jan 2012 22:48:05 +0000
On Thu, Jan 26, 2012 at 13:47, David Storandt <dstorandt () teljet com> wrote:
You can put a 3dB or 5dB optical pad on the link if the receiver can't handle zero-distance optical power.
As I recall, the problem may not only be the power (which can cause receiver saturation), but issue that fibre paths shorter than (around) 2-10m do not properly condition the light(*), which can result in some issues at the receiver. Gary (*) My memory says modal distribution issues. While 'single mode' fibre only supports one mode of transmission, it takes a short distance for the fibre to really be single mode. You can use a mode filter to address the problem, or just use fibres that are at least a few meters.
Current thread:
- RE: LX sfp minimum range, (continued)
- RE: LX sfp minimum range Holmes,David A (Jan 26)
- Message not available
- Re: LX sfp minimum range Pierre-Yves Maunier (Jan 26)
- RE: LX sfp minimum range George Bonser (Jan 26)
- Message not available
- RE: LX sfp minimum range George Bonser (Jan 26)
- Re: LX sfp minimum range Pierre-Yves Maunier (Jan 26)
- Re: LX sfp minimum range PC (Jan 26)
- Re: LX sfp minimum range Steven Tardy (Jan 27)
- Re: LX sfp minimum range Pierre-Yves Maunier (Jan 27)
- Re: LX sfp minimum range Tom Storey (Jan 29)
- Message not available
- RE: LX sfp minimum range George Bonser (Jan 26)
- Re: LX sfp minimum range Gary Buhrmaster (Jan 26)
- Re: LX sfp minimum range Wayne E Bouchard (Jan 26)