[j-nsp] acceptable/good laser receive power in case of different interfaces
joelja at bogus.com
Tue Aug 2 18:14:06 EDT 2011
if these are sr multimode optics, the -15 number is low the -7 number is marginal and everything else is decent.
either the -15 one is quite long ( for sr) or needs to be replugged/cleaned/reterminated
On Aug 2, 2011, at 2:53 PM, chip wrote:
> Depending on whose optics you're using there should be a data sheet
> that shows the acceptable Tx/Rx levels for each type available from
> your vendor. I can't seem to locate a document for Juniper at the
> moment. But I assume they shouldn't be that far off from Cisco stuff.
> For example, here's a data sheet for the XENPAK module:
> Check Table-2.
> As far as I know, an optic will output power within a specified range
> as according to what type it is, SR, LR, ER, ZR, etc...
> Hope that helps a bit.
> On Tue, Aug 2, 2011 at 5:26 PM, Martin T <m4rtntns at gmail.com> wrote:
>> What is the acceptable Rx power in case of SFP/XFP? For example, here
>> are XFP Tx and Rx signals from six FXP's:
>> Laser output power : 1.2920 mW / 1.11 dBm
>> Laser rx power : 0.0285 mW / -15.45 dBm
>> Laser output power : 0.6420 mW / -1.92 dBm
>> Laser rx power : 0.3054 mW / -5.15 dBm
>> Laser output power : 0.4230 mW / -3.74 dBm
>> Laser rx power : 0.5092 mW / -2.93 dBm
>> Laser output power : 0.4180 mW / -3.79 dBm
>> Laser rx power : 0.4208 mW / -3.76 dBm
>> Laser output power : 1.0920 mW / 0.38 dBm
>> Laser rx power : 0.1801 mW / -7.44 dBm
>> Laser output power : 0.7680 mW / -1.15 dBm
>> Laser rx power : 0.3337 mW / -4.77 dBm
>> Is there some sort of pattern? It looks like if the Rx signal is
>> lower, the Tx is higher? And what can one consider a decent Rx laser
>> power level?
>> juniper-nsp mailing list juniper-nsp at puck.nether.net
> Just my $.02, your mileage may vary, batteries not included, etc....
> juniper-nsp mailing list juniper-nsp at puck.nether.net
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