12
5
2
OC 3, single mode long
each
OC 3, single mode inter
reach
OC 3, multi-mode short
reach
Reserved
1000BASE-T
1000BASE-CX
1000BASE-LX
1000BASE-SX
5
1
9
7
Twin Axial Pair (TW)
5
0
9
6
Shielded Twisted Pair (TP)
9
9
9
9
9
9
5
4
3
2
1
0
Miniature Coax (MI)
Video Coax (TV)
Multi-mode, 62.5
μ
(M6)
Multi-mode, 50
μ
(M5)
Reserved
Single Mode (SM)
6
6
6
6
6
7-4
3
2
1
0
10
10
10
10
10
10
7-5
4
3
2
1
0
Reserved
400 MBytes/Sec
Reserved
200 Mbytes/Sec
Reserved
100 MBytes/Sec
Encoding
The encoding value indicates the serial encoding mechanism that is the nominal design target of the
particular SFP transceiver. The value shall be contained in the serial data.
Value
00h
Unspecified
01h
8B10B
02h
4B5B
03h
NRZ
04h
Manchester
05h -FFh
Reserved
Description
BR, nominal
The nominal bit rate (BR, nominal) is specified in units of 100 Megabits per second, rounded off to the
nearest 100 Megabits per second. The bit rate includes those bits necessary to encode and delimit the
signal as well as those bits carrying data information. A value of 0 indicates that the bit rate is not
specified and must be determined from the transceiver technology. The actual information transfer rate
will depend on the encoding of the data, as defined by the encoding value.
Length (9
μ
)-km
Addition to EEPROM data from original GBIC definition. This value specifies the link length that is
supported by the SFP transceiver while operating in compliance with the applicable standards using
single mode fiber. The value is in units of kilometers. A value of 255 means that the transceiver
supports a link length greater than 254 km. A value of zero means that the transceiver does not
support single mode fiber or that the length information must be determined from the transceiver
technology.