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:
http://www.cisco.com/en/US/prod/collateral/modules/ps2797/ps5138/product_data_sheet09186a008007cd00_ps5455_Products_Data_Sheet.html 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 <m4rtn...@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: > > 1: > Laser output power : 1.2920 mW / 1.11 dBm > Laser rx power : 0.0285 mW / -15.45 dBm > > 2: > Laser output power : 0.6420 mW / -1.92 dBm > Laser rx power : 0.3054 mW / -5.15 dBm > > 3: > Laser output power : 0.4230 mW / -3.74 dBm > Laser rx power : 0.5092 mW / -2.93 dBm > > 4: > Laser output power : 0.4180 mW / -3.79 dBm > Laser rx power : 0.4208 mW / -3.76 dBm > > 5: > Laser output power : 1.0920 mW / 0.38 dBm > Laser rx power : 0.1801 mW / -7.44 dBm > > 6: > 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? > > > regards, > martin > _______________________________________________ > juniper-nsp mailing list juniper-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/juniper-nsp > -- Just my $.02, your mileage may vary, batteries not included, etc.... _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp