10
SGFEB10xx-12x
24-Hour Technical Support: 1-800-260-1312 -- International: 00-1-952-941-7600
Operation—continued
Product features—continued
Half-Duplex network (512-Bit Rule)
In a half-duplex network, the maximum cable lengths are determined by the round
trip delay limitations of each Fast Ethernet collision domain. (A collision domain is
the longest path between any two terminal devices, e.g. a terminal, switch, or
router.)
The 512-Bit Rule determines the maximum length of cable permitted by calculating
the round-trip delay in bit-times (BT) of a particular collision domain. If the result
is less than or equal to 512 BT, the path is good.
For more information on the 512-Bit Rule, see the white paper titled “Collision
Domains” on the Transition Networks website at: www.transition.com.
Pause
The pause feature is used to temporarily suspend data transmission in order to
relieve buffer congestion. If a media converter needs some time to clear network
congestion, it will send a pause signal to the media converter at the other end, which
will wait a predetermined amount of time before re-transmitting the data. This
feature reduces data bottlenecks, allows for a more efficient use of the network
devices, and prevents the loss of valuable data.
AutoCross™
The AutoCross feature allows either straight-through (MDI) or crossover (MDI-X)
cables to be used when connecting to devices such as hubs, transceivers, or network
interface cards (NICs). AutoCross determines the characteristics of the cable
connection and automatically configures the unit to link up, regardless of the cable
configuration.
Automatic link restoration
The converter will automatically restore the link between networked devices after a
fault condition has been corrected. Competitors’ products, in contrast, require the
user to power down, then power up the converters after a fault condition has been
corrected.
SGFEB10xx-12x
Cable Specifications
The physical characteristics must meet or exceed IEEE 802.3™ specifications.
Fiber cable
Bit Error Rate: <10-9
Single mode fiber (recommended):9μm
Multimode fiber (recommended): 62.5/125 μm
Multimode fiber (optional): 100/140, 85/140, 50/125 μm
SGFEB1013-120 850 nm multimode
Fiber Optic Transmitter Power: min: -10.0 dBm max: -4.0 dBm
Fiber Optic Receiver Sensitivity: min: -17.0 dBm max: 0.0 dBm
Link Budget: 7.0 dB
SGFEB1014-120 1310 nm single mode
Fiber Optic Transmitter Power: min: -13.0 dBm max: -3.0 dBm
Fiber Optic Receiver Sensitivity: min: -20.0 dBm max: -3.0 dBm
Link Budget: 7.0 dB
SGFEB1015-120 1310 nm single mode
Fiber Optic Transmitter Power: min: -5.0 dBm max: -0.0 dBm
Fiber Optic Receiver Sensitivity: min: -20.0 dBm max: -3.0 dBm
Link Budget: 15.0 dB
SGFEB1017-120 1550 nm single mode
Fiber Optic Transmitter Power: min: -3.0 dBm max: 2.0 dBm
Fiber Optic Receiver Sensitivity: min: -23.0 dBm max: -3.0 dBm
Link Budget: 20.0 dB
SGFEB1024-120 1300 nm multimode *
Fiber Optic Transmitter Power: min: -10.0 dBm max: -3.0 dBm
Fiber Optic Receiver Sensitivity: min: -17.0 dBm max: -3.0 dBm
Link Budget: 7.0 dB
SGFEB1029-120 1310 TX/1550 RX nm single mode
Fiber Optic Transmitter Power: min: -8.0 dBm max: -3.0 dBm
Fiber Optic Receiver Sensitivity: min: -21.0 dBm max: -3.0 dBm
Link Budget: 13.0 dB
SGFEB1029-121 1550 TX/1310 RX nm single mode
Fiber Optic Transmitter Power: min: -8.0 dBm max: -3.0 dBm
Fiber Optic Receiver Sensitivity: min: -21.0 dBm max: -3.0 dBm
Link Budget: 13.0 dB
SGFEB1029-122 1310 TX/1550 RX nm single mode
Fiber Optic Transmitter Power: min: -3.0 dBm max: +2.0 dBm
Fiber Optic Receiver Sensitivity: min: -23.0 dBm max: -8.0 dBm
Link Budget: 20.0 dB
SGFEB1029-123 1550 TX/1310 RX nm single mode
Fiber Optic Transmitter Power: min: -3.0 dBm max: +2.0 dBm
Fiber Optic Receiver Sensitivity: min: -23.0 dBm max: -8.0 dBm
Link Budget: 20.0 dB
*Fiber cable for SGFEB1024-120 must be 62.5/125 μm.