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 suspend data transmission temporarily in order to
relieve buffer congestion. If a media converter needs some additional time to clear
network congestion, it will send a pause signal to the media converter at the other
end, that media converter will wait a predetermined amount of time before re-
transmitting data. This feature reduces data bottlenecks and allows for more
efficient use of the network devices while preventing 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. In contrast, products from competitors generally
require the user to power down, then power up the converters after a fault condition
has been corrected.
[email protected] -- Click the “Transition Now” link for a live Web chat.
11
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)
:
9 µm
Multimode fiber
(recommended)
:
62.5/125 µm
Multimode fiber
(optional)
:
100/140, 85/140, 50/125 µm
SGFEB1013-120 850nm
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
1310nm 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
1310nm 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
1550nm 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
1300nm 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
1310nm TX/1550nm RX single mode
SGFEB1029-121
1550nm TX/1310nm RX 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
1310nm TX/1550nm RX single mode
SGFEB1029-123
1550nm TX/1310nm RX 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.
