3Com 5102M-FBP, 5104M-FB1 ONline 10BASE-FB Module Optical Power Budget High Power, ONline to

Table 2-5 provides information on the 10BASE-FB-specific optical power budget.

Table 2-4. ONline 10BASE-FB Module Optical Power Budget: High Power

				Link Loss	Link Loss
Cable					Required
	Transmit	Receive	Optical	Required
Size					(dB)
	Power	Power	Power	(dB)
Used					(ONline to
	(dBm)	(dBm)	Budget	(ONline to
(micron)					10BASE-F
			(dB)	ONline)
					B)
50/125	-14.25 ±	-8.0 to	13.5	None	>2.0
NA 0.20	2.25	-30.0
62.5/125	-10.0 ±	-8.0 to	17.75	>0.25	>6.25
NA	2.25	-30.0
0.275
85/125	-7.0 ±	-8.0 to	20.75	>3.25	>9.25
NA 0.29	2.25	-30.0
100/140	-4.5 ±	-8.0 to	23.25	>5.75	>11.75
NA 0.29	2.25	-30.0

Table 2-5. 10BASE-FB Optical Power Budget

Cable Size Used	Transmit	Receive	Optical
	Power	Power	Power
(micron)
	(dBm)	(dBm)	Budget (dB)
50/125 (NA 0.20)	-20.0 ± 1.0	-14.0 to 29.0	8.0
62.5/125(NA 0.275)	-15.1 ± 1.0	-14.0 to 29.0	12.9
85/125 (NA 0.29)	-13.1 ± 1.0	-14.0 to 29.0	14.9
100/140 (NA 0.29)	-11.6 ± 1.0	-14.0 to 29.0	16.4

Designing and Expanding the Network 2 - 9