Hello. I'm choosing SFP for cisco 3750-X. In datasheet for GLC-BX-U(D) min transmit power is -9 dBm, min receive power is -19.5 dB. So max insertion loss in channal is about 10.5 dB. But in this datasheet it's just 5.5 dB for GLC-BX-D and 6 dB for GL...