[148963] in North American Network Operators' Group
Re: LX sfp minimum range
daemon@ATHENA.MIT.EDU (Pierre-Yves Maunier)
Thu Jan 26 17:33:17 2012
In-Reply-To: <CAEGdXrOKgoTitUrA2rfLSU+DDp2_9zsqa02H6o5obAR5MVTdfg@mail.gmail.com>
Date: Thu, 26 Jan 2012 23:32:56 +0100
From: Pierre-Yves Maunier <nanog@maunier.org>
To: "Holmes,David A" <dholmes@mwdh2o.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
2012/1/26 Pierre-Yves Maunier <pierre-yves@maunier.fr>
>
>
> 2012/1/26 Holmes,David A <dholmes@mwdh2o.com>
>
> I have found that -5dB or -10dB attenuators must be used on the send or
>> receive strands between Cisco LX connected switches at relatively short
>> distances of < 1 km over standard singlemode fiber.
>>
>> Other Vendors' SFPs rated up to 25 km do not need attenuators at
>> distances <1 km.
>>
>
> Cisco standard LX TX between -3dBm and -9dBm
> RX sensitivity is from -9dBm to -19dBm
>
Oups typo, RX from -3 dBm to -19 dBm
--
Pierre-Yves Maunier
