C/E-TX-SX-02 IN THE NETWORK
(continued)
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
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
™
collision domain.
(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.
To calculate a collision domain
round-trip delay in bit-times, 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)), then take the
sum of all cable delays plus station (DTE), repeater, and media converter
delays. If the result is less than or equal to 512 bit-times, the path is good.
YES - QUICKLY
•
The media converter has selected 100 Mb/s operation. If this is NOT
the correct speed, disconnect and reconnect the 10/100BASE-TX
cable to restart the initialization process. If the fault is not corrected,
proceed to step 6.
6.
Is the 10/100TX ACT(ivity) LED illuminated?
NO
•
If there is no activity on the 10/100BASE-TX port, proceed to step 7.
•
If there is activity on the 10/100BASE-TX port, disconnect and
reconnect the 10/100BASE-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 7.
7.
Is the 10/100SX ACT(ivity) LED illuminated?
NO
•
If there is no activity on the 10/100BASE-SX port, continue below
•
If there is activity on the 10/100BASE-SX port, disconnect and
reconnect the 10/100BASE-SX cable to restart the initialization
process.
•
Restart the workstation to restart the initialization process.
•
Contact Technical Support: (800) 260-1312.
YES
•
Contact Technical Support: (800) 260-1312.
•
Verify that TX and RX cables on media converter are connected to
RX and TX ports, respectively, on other device.
Class I repeater
140 BT
Class II repeater
92 BT
DTE (PC, switch, router)
50 BT
C/E-TX-SX-02 12
BT
1 meter CAT.5 TP cable
1.11 BT
1 meter fiber cable
1 BT
Fast Ethernet switch
50 BT
10 meters TP
@ 1.11BT/meter
= 11.1BT
10 meters TP
@ 1.11BT/meter
= 11.1BT
E-TX-SX-02
= 12BT
DTE= 50BT
Half-Duplex Collision Domain
Half-Duplex Collision Domain
200 meters fiber
@ 1.0 BT/meter
= 200BT
DTE= 50BT
50.00BT
+11.10BT
+12.00BT
+200.00BT
+12.00BT
+11.10BT
+50.00BT
__________
_
= 346.20BT
DTE= 50BT
10 meters TP
@ 1.11BT/meter
= 11.1BT
150 meters fiber
@ 1.0 BT/meter
= 150BT
10 meters TP
@ 1.11BT/meter
= 11.1BT
Class I
Hub
= 140BT
50.00BT
+11.10BT
+140.00BT
+150.00BT
+12.00BT
+11.10BT
+50.00BT
__________
_
= 424.20BT
Switch/
Router
= 50BT
E-TX-SX-02
= 12BT
Full-Duplex - NO Collision Domain
E-TX-SX-02
= 12BT
E-TX-SX-02
= 12BT
