Finisar AN-2030 - Manual (Page 9)

AN-2030: Digital Diagnostic Monitoring Interface for Optical Transceivers
F i n i s a r
9/26/02 Revision D Page 9
BR, nominal 1
The nominal bit rate (BR, nominal) is specified in units of 100 Megabits per second, 2
rounded off to the nearest 100 Megabits per second. The bit rate includes those bits 3
necessary to encode and delimit the signal as well as those bits carrying data 4
information. A value of 0 indicates that the bit rate is not specified and must be 5
determined from the transceiver technology. The actual information transfer rate will 6
depend on the encoding of the data, as defined by the encoding value. 7
8
Length (9
µ)-km
9
Note that this field is an addition to EEPROM data from the original GBIC definition. 10
This value specifies the link length that is supported by the transceiver while operating 11
in compliance with the applicable standards using single mode fiber. The value is in 12
units of kilometers. A value of 255 means that the transceiver supports a link length 13
greater than 254 km. A value of zero means that the transceiver does not support single 14
mode fiber or that the length information must be determined from the transceiver 15
technology. 16
17
Length (9
µ)
18
This value specifies the link length that is supported by the transceiver while operating 19
in compliance with the applicable standards using single mode fiber. The value is in 20
units of 100 meters. A value of 255 means that the transceiver supports a link length 21
greater than 25.4 km. A value of zero means that the transceiver does not support 22
single mode fiber or that the length information must be determined from the transceiver 23
technology. 24
25
Length (50
µ)
26
This value specifies the link length that is supported by the transceiver while operating 27
in compliance with the applicable standards using 50 micron multi-mode fiber. The 28
value is in units of 10 meters. A value of 255 means that the transceiver supports a link 29
length greater than 2.54 km. A value of zero means that the transceiver does not 30
support 50 micron multi-mode fiber or that the length information must be determined
31
from the transceiver technology. 32
33
Length (62.5
µ)
34
This value specifies the link length that is supported by the transceiver while operating 35
in compliance with the applicable standards using 62.5 micron multi-mode fiber. The 36
value is in units of 10 meters. A value of 255 means that the transceiver supports a link 37
length greater than 2.54 km. A value of zero means that the transceiver does not 62.5 38
micron multi-mode fiber or that the length information must determined from the 39