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Hello,Cisco recommends using qualified SFP's. To verify whether a SFP is qualified or not please check the specification of the devices in question.Please be aware that some devices might accept 3rd party SFP in one version and reject the same SFP af...
Minimum distance for GBIC-ZX is 34 cm (30 cm patch-cord + 15 dB attenuator), unless you find a shorter cable To make it work just use SM fibers and keep the receive power level within GBIC' specs.1000BASE-ZX Specs: Transmit Power (dBm) = +5 to 0 ...
Any 15 dB attenuator would do the job. 10 dB might be too low for some transponders. If you place a loopback directly on transpnders (without including OADM on the loop) a 20 dB attenuator would be preferable. Just avoid "air-gap" attenuators, as the...
"But, using the existing installed MMF fiber plus the MFCs can be cheaper than having to run new singlemode fiber optic cables. This is the difference between theoretical and reality."That is true. The best one is not always the cheapest :-) However...
In this setup the receivers cannot be saturated (according to 1000baseLX and GLC-LH-SM specs). The problem is due to differential mode delay, i.e. due to pulse dispersion, which happens when connecting Single-Mode interfaces via Multimode patch-cords...
