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AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers F i n i s a r
9/26/02 Revision D Page 10
transceiver technology. It is common for the transceiver to support both 50 micron and 1
62.5 micron fiber. 2
3
Length (Copper) 4
This value specifies the minimum link length that is supported by the transceiver while 5
operating in compliance with the applicable standards using copper cable. The value is 6
in units of 1 meter. A value of 255 means that the transceiver supports a link length 7
greater than 254 meters. A value of zero means that the transceiver does not support 8
copper cables or that the length information must be determined from the transceiver 9
technology. Further information about the cable design, equalization, and connectors is 10
usually required to guarantee meeting a particular length requirement. 11
12
Vendor name 13
The vendor name is a 16 character field that contains ASCII characters, left-aligned and 14
padded on the right with ASCII spaces (20h). The vendor name shall be the full name of 15
the corporation, a commonly accepted abbreviation of the name of the corporation, the 16
SCSI company code for the corporation, or the stock exchange code for the corporation. 17
At least one of the vendor name or the vendor OUI fields shall contain valid serial data. 18
Finisar transceivers contain the text string “FINISAR CORP.” in this address. 19
20
DWDM Channel Spacing 21
Byte 36 is reserved (set to 00h) in the SFP MSA as well as in SFF-8472. Finisar 22
DWDM transceivers use this byte to indicate their channel spacing. DWDM channel 23
spacing is an 8 bit unsigned integer indicating the DWDM channel spacing in units of 24
gigahertz. This byte is set to 00h in all non-DWDM Finisar transceivers. 25
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Vendor OUI 27
The vendor organizationally unique identifier field (vendor OUI) is a 3-byte field that 28
contains the IEEE Company Identifier for the vendor. A value of all zero in the 3-byte 29
field indicates that the Vendor OUI is unspecified. Finisar transceivers contain the 30
values 00h, 90h and 65h in these addresses. 31
32
Vendor PN 33
The vendor part number (vendor PN) is a 16-byte field that contains ASCII characters, 34
left-aligned and padded on the right with ASCII spaces (20h), defining the vendor part 35
number or product name. A value of all zero in the 16-byte field indicates that the 36
vendor PN is unspecified. 37
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