09-10-2014 12:10 AM
Hi Guys,
My first post.
I have a L2 network spanning 12km, 13km, 14km and 16km.
Have purchased GLC-LX-SM-RGD and now I notice that the specs say 10km. I am commissioning next week and want to know will the SFP shoot that distance ? Will it help to set the speed on the interface to 10mbps to get the link working ?
Thanks in advance and really appreciate your comments and feedback.
- Alvin
09-10-2014 12:35 AM
I'm not going to take any risks. If you have a 15 kms link, then get the GLC-EX-SMD.
09-10-2014 12:49 AM
Unfortunately I dont have the time to buy them now.
Interestingly, I was looking at another installation where the hop was 10kms and the optical loss was about 5 db (sh int g0/0/0 trans det). The optical budget for the GLC-LX-SM-RGD is about 16-17db.
09-10-2014 11:15 AM
1000BASE-LX/LH | -3 to -9.5 | -3 to -20 | 2.4 (any MMF) | 1270 to 1355 |
Optical budget is not 16-17dBm but around 10-10.5dBm a realistic. Take the lowest value of Transmit level not highest. So should be fine and you can test but these transmit values can change over time.So if you are very close not worth to take chance.
Hope the existing 10Km hop is using the same kind of SFP means working on 1300nm not 1500nm.
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