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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi All,<o:p></o:p></p><p class=MsoNormal><b><i><o:p> </o:p></i></b></p><p class=MsoNormal>I have been working with a cable vendor that has questioned Byte 188-189 for Active Fiber Cables. He feels that this field should only be required for Optical Transceivers. Therefore he feels for direct attached fiber optic cables (which is 95% of what we see) the value in this field should or could be zero. <b><i> </i></b>I have discussed this with Tom Palkert and we feel the description in SFF8436 provides the best guidance. <b><i> </i></b>We have decided to allow zero but I will also not fail the AOC if it is programmed with a reasonable non-zero value.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='text-autospace:none'><b><span style='font-size:10.0pt;font-family:Courier'>7.6.2.20 Wavelength Tolerance (Address 188-189)<o:p></o:p></span></b></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:Courier'>The guaranteed +/- range of transmitter output wavelength under all normal operating<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:Courier'>conditions. <b><span style='color:red'>For direct attach cable assemblies the value is zero</span></b>. 16 bit value with byte<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:Courier'>188 as high order byte and byte 189 as low order byte. The laser wavelength is equal to<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:Courier'>the 16 bit integer value divided by 200 in nm (units of 0.005nm). Thus, the following two<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:Courier'>examples:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:Courier'><o:p> </o:p></span></p><p class=MsoNormal>It also seems to be somewhat in conflict with the table which indicates that it is required for both AOC and Optical Module<o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:Courier'><o:p> </o:p></span></p><p class=MsoNormal><img width=611 height=91 id="Picture_x0020_2" src="cid:image002.png@01CC7D5C.1404BDA0" alt="Description: cid:image002.png@01CC7D5C.1404BDA0"><span style='font-size:10.0pt;font-family:Courier'><o:p></o:p></span></p><p class=MsoNormal><img width=616 height=83 id="Picture_x0020_1" src="cid:image001.png@01CC7D5B.D41DF210" alt="Description: cid:image001.png@01CC7D5B.D41DF210"><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Rupert<o:p></o:p></p></div></body></html>