INSTALLATION
(continued)
Powering the Bridging Media Converter
To power ON the bridging media converter:
1. Locate power receptacle on back of bridging media converter
2. Connect the bridging media converter power connector end of
the power supply adapter to the power receptacle on the back of
the Transition Network’s bridging media converter.
3. Connect the external power connector end of the power supply
adapter to external AC power.
NOTE: After the power supply adapter is connected to the bridging
media converter and to external power, the green Power LED is
illuminated.
Using the 512-Bit Rule (100BASE-TX/100BASE-FX)
A bit-time (BT) is the amount of time required to send one data bit
across an Ethernet LAN. The total number of bit-times between any
two DTEs in the same Fast Ethernet 100BASE-TX or 100BASE-FX
collision domain cannot exceed 512 bit-times in the round trip.
To calculate the round trip delay in bit-times between a station (DTE)
and the Transition Networks’ bridging media converter, determine the
Fast Ethernet worst case round-trip delays expressed in bit times:
•
Find the longest and most complicated collision domain path
between the station and the Transition Networks’ Bridging Media
Converter.
•
Calculate the round trip
delay for each cable
segment by multiplying
the length of the cable
(in meters) by the delay
per meter (in bit times
(BT)) for each cable type
as listed in the table
•
Calculate the total round trip delay by taking the sum of all the
individual cable delay values in the path, as listed in the table, plus
station (DTE) delays and hub (repeater) delays.
•
Add the segment delay values together. If the result is less than or
equal to 512 bit times, the path passes the test.
NOTE: Actual manufacturers’ bit-time values and/or measured bit-time
values may be greater or less than bit-time values listed in the chart.
Full-Duplex Fiber/NO Collision Domain
Collision Domain
Class II
Hub
Collision Domain
Class I
Hub
100 meters TP
@ 1.11BT/meter
= 111BT
5 meters TP
@ 1.11BT/meter
= 5.55BT
DTE= 50BT
= 140BT
= 92BT
Class II
Hub
= 92BT
Switch
= 50BT
100 meters TP
@ 1.11BT/meter
= 111BT
100 meters TP
@ 1.11BT/meter
= 111BT
100 meters TP
@ 1.11BT/meter
= 111BT
Switch
= 50BT
DTE= 50BT
50.00BT
+111.00BT
+92.00BT
+5.55BT
+92.00BT
+111.00BT
50.00BT
___________
= 511.55BT
50.00BT
+111.00BT
+140.00BT
+111.00BT
50.00BT
___________
= 462.00BT
Class I Repeater . . . . . . . . . . . . . . . . .140 BT
Class II Repeater . . . . . . . . . . . . . . . . . .92 BT
Class I TX/FX Media Converter . . . . . .130 BT
Class II TX/FX Media Converter . . . . . .92 BT
DTE . . . . . . . . . . . . . . . . . . . . . . . . . . .50 BT
1 meter of CAT.5 TP cable . . . . . . . . .1.11 BT
1 meter of fiber cable . . . . . . . . . . . . . . .1 BT
Bridging Media Converter . . . . . . . . . . .50 BT
Summary of Contents for E-PSW-FX-03
Page 9: ......
