[AusNOG] LR to LRL

[Tony]

You can tell by measuring the output of the LR optic, add in the attenuation of the fibre between the two and then see if it's above the RX level on the LRL optic. If it's too high, you'll need to attenuate the TX power output from the LR optic.
If you can't measure/calculate it you can use an in-line attenuator on just the TX fibre from the LR optic. They're pretty cheap, buy a handful at different attenuation levels. Set the gear up with 15dB attenuator, check the receive levels, if too low, swap to a lesser attenuator until you get something that is workable.
This of course relies on having workable DOM that will report the TX/RX levels to you.

regards,Tony.

      From: Skeeve Stevens <skeeve+ausnog at eintellegonetworks.com>
 To: "<ausnog at lists.ausnog.net>" <ausnog at lists.ausnog.net> 
 Sent: Wednesday, 8 July 2015, 17:13
 Subject: [AusNOG] LR to LRL
   
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 LtdEmail: skeeve at eintellegonetworks.comCell +61 (0)414 753 383 ; Skype: skeeveLinkedIn: /in/skeeve ; Expert360: Profile

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