[AusNOG] LR to LRL

[Tony]

Hi Sean,


Don't know about other brands, but Cisco at least are not like what you're describing.

1000BASE-LX/LH (up to 10km)
TX = -3 to -9.5 
RX = -3 to -20

1000BASE-ZX  (up to 70km)
TX = +5 to 0 
RX = -3 to -23

The ZX has slightly better RX sensitivity, but the main difference is in the output, which is higher on the ZX optics.

The greatest worry is too high output from the ZX  (+5 to 0) being above the allowed receive levels on the LX (-3 to -20).



regards,
Tony.


________________________________
From: Sean Finn <sean at wikwok.com>
To: Skeeve Stevens <skeeve+ausnog at eintellegonetworks.com> 
Cc: "<ausnog at lists.ausnog.net>" <ausnog at lists.ausnog.net> 
Sent: Wednesday, 8 July 2015, 22:08
Subject: Re: [AusNOG] LR to LRL



Could always just attenuate the input of the 1k optic to be on the safe side to keep it in the optics receive-sensitivity mid-range. Maybe a 3db or 5db attenuator?


>From what I understand, receive optics of higher km are usually more sensitive.. so i'd perhaps be just as if not more worried about the receive side of the 10km optic being bedazzled. (might need to attenuate it too).

Sean.


On Wed, Jul 8, 2015 at 5:13 PM, Skeeve Stevens <skeeve+ausnog at eintellegonetworks.com> wrote:


>
>
>Hi guys,
>
>
>Just wondering if anyone know of risks of using an LR (10km) optic to an LRL (1km) optic are...   will they work fine, or will the LR burn out the LRL.
>
>
>Thanx!
>
>
>...Skeeve
>
>
>Skeeve Stevens - Founder & Chief Network Architect 
>eintellego Networks Pty Ltd
>Email: skeeve at eintellegonetworks.com
>Cell +61 (0)414 753 383 ; Skype: skeeve
>LinkedIn: /in/skeeve ; Expert360: Profile
>
>
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>


-- 



----------------------------------------------------------------------------------------------
Sean K Finn  B.InfTech Qld.UT (Net Sys) 
WikWok.com | Wholesale Internets | Brisbane | Australia
Team: 07 3193 1079 | Mob: 0488 01 7474 | Email sean at wikwok.com


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