Transition Networks CSETF1011 User Manual page 4

CSETF10XX IN THE NETWORK
Media Converter in Full-Duplex Network
In a full-duplex network, maximum cable lengths are determined by the
cables used. See page 10 for cable specifications.
NOTE: THE 512-BIT RULE DESCRIBED BELOW DOES NOT APPLY IN A
FULL-DUPLEX NETWORK.
Media Converter in Half-Duplex Network
NOTE: The 512-Bit Rule applies separately to each collision domain.
USING THE 512-BIT RULE
In a half-duplex network, maximum cable lengths are determined by the
round trip delay limitations of each Fast Ethernet
(Switches and routers divide the network into separate Ethernet™ collision
domains.) The 512-Bit Rule determines maximum distances by calculating
the collision domain round-trip delay in bit-times.
Class I repeater 140 BT
Class II repeater 92 BT
DTE (PC, switch, router) 50 BT
CSETF10xx 12 BT
1 meter CAT.5 TP cable 1.11 BT
1 meter fiber cable 1 BT
Fast Ethernet switch 50 BT
then take the sum of all cable delays plus DTE, repeater, and media converter
delays. If the result is less than or equal to 512 bit-times, the path is good.
200 meters fiber
@ 1.0 BT/meter
= 200BT
DTE= 50BT
= 12BT
10 meters TP
10 meters TP
@ 1.11BT/meter
@ 1.11BT/meter
= 11.1BT
50.00BT
= 11.1BT
+11.10BT
+12.00BT
+200.00BT
DTE= 50BT = 12BT
+12.00BT
+11.10BT
+50.00BT
__________
_
= 346.20BT
Half-Duplex Collision Domain
Full-Duplex - NO Collision Domain
(continued)
collision domain.
™
To calculate a collision domain
round-trip delay, find the longest path
between any two terminal devices in
the collision domain. Calculate the
round trip delay by multiplying the
length of the cable (in meters) by the
delay per meter (in bit-times – BT),
Half-Duplex Collision Domain
50.00BT
150 meters fiber
+11.10BT
@ 1.0 BT/meter
+140.00BT
= 150BT
+150.00BT
Class I +12.00BT
+11.10BT
Hub
= 140BT +50.00BT
__________
10 meters TP
= 424.20BT
@ 1.11BT/meter
= 11.1BT
DTE= 50BT
= 12BT
10 meters TP
@ 1.11BT/meter
= 11.1BT
= 12BT
Switch/
Router
= 50BT
5. Is the RXC LED flashing?
NO
• If there IS NO ACTIVITY on the 10BASE-T/100BASE-TX port,
proceed to step 6.
• If there IS ACTIVITY on the 10BASE-T/100BASE-TX port, disconnect
and reconnect the 10BASE-T/100BASE-TX cable to restart the
initialization process.
• Restart the workstation to restart the initialization process.
• Contact Technical Support: (800) 260-1312.
YES
• Proceed to step 6.
6. Is the RXF LED flashing?
NO
• If there IS NO ACTIVITY on the 10BASE-FL/100BASE-SX port,
continue below
• If there IS ACTIVITY on the 10BASE-FL/100BASE-SX port,
disconnect and reconnect the 10BASE-FL/100BASE-SX cable to
restart the initialization process.
• Verify that TX and RX cables on media converter are connected to
RX and TX ports, respectively, on other device.
• Restart the workstation to restart the initialization process.
• Contact Technical Support: (800) 260-1312.
YES
• Contact Technical Support: (800) 260-1312.
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