From: Greg Ferro (gferro@xxxxxxxxxxxxxxxxxxx)
Date: Wed Apr 04 2001 - 21:55:26 GMT-3
>Date: Wed, 04 Apr 2001 22:52:02 +1000
>To: Mohamed Heeba <MAHeeba@itqan.co.ae>
>From: Greg Ferro <gferro@netstarnetworks.com>
>Subject: Re: Gigabit ethernet distance limitation (off topic )
>
>Yes they can.
>
>Note that you should understand the physical layer. LX standard uses is a
>single mode laser, this means 9 nanometre aperture. SO to connect to MM
>you need to modify the aperture to 62.5 nanometre. This is done using a
>mode conditioning cable, its in the price list. This basically has a bit
>in the middle that diffuses the signal (apologies to the highly technical,
>but it will do) from SM to MM. You can drive this to 500 metres or so
>according to the standard. The real story is typically 1000 metres,
>depending on power loss as determined by cable quality and termination
>quality, YMMV.
>
>Note: Cisco charges an extraordinary sum for this cable, in Australia its
>about $1000 at RRP. You can find it at good cable suppliers for under
>$150. May have to order it in. Works fine.
>
>At 08:30 PM 4/04/2001, you wrote:
>>hi guys
>>anyone know if the LX modules can run over MM fiber ?
>>where can i get the distance limitation for this
>>
>>
>>thx
Regards
Greg Ferro | |
Senior Network Engineer, CCIE #6920, CCNP ||| |||
NetStar Australia Pty Ltd. .|||||. .|||||.
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