Back-to-back topology – Allied Telesis AT-MC1005/4 User Manual
Page 18
Overview
8
Back-to-Back Topology
In some network configurations you may want to interconnect two media
converters in what is referred to as a back-to-back topology. In this topology,
the media converters not only extend the distance of your network but also
convert the fiber optic cable from twisted pair to fiber optic and back again.
Figure 5 illustrates one AT-8216FXL/MT switch with an AT-A14 expansion
module at each campus. The switches are interconnected by two AT-MC1005/3
media converters. The 1000Base-T ports on the media converters are
connected to the AT-A14 expansion modules in the switches, while the
1000Base-LX ports on the media converters are directly connected together.
Note
When using two media converters back-to-back, you must set both
converters to the same mode (ie. the first media converter is set to
MissingLink mode; then the second converter must also be set to
MissingLink mode.
Figure 5 Back-to-Back Topology
100BASE-FX FAST ETHERNET SWITCH
STATUS
RESET
FAULT
RPS
PWR
100BASE-FX
A
B
RS-232
TERMINAL PORT
PORT ACTIVITY
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
ACTIVITY
FULL DUP
100M LINK
HALF DUP/ COL
L /A
D/C
AT-A14
1000BASE-X
LINK
ACTIVITY
FULL
HALF
100BASE-FX FAST ETHERNET SWITCH
STATUS
RESET
FAULT
RPS
PWR
100BASE-FX
A
B
RS-232
TERMINAL PORT
PORT ACTIVITY
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
L /A
D/C
ACTIVITY
FULL DUP
100M LINK
HALF DUP/ COL
L /A
D/C
AT-A14
1000BASE-X
LINK
ACTIVITY
FULL
HALF
1000Base-T
MODE
ML
SML
LT
LNK
ACT
PWR
LNK
ACT
V2
CLASS 1
LASER PRODUCT
DO NOT STARE
INTO BEAM
1000Base-LX
TX
SM
RX
AT-MC1005/3
GIGABIT ETHERNET MEDIA CONVERTER
1000Base-T
MODE
ML
SML
LT
LNK
ACT
PWR
LNK
ACT
V2
CLASS 1
LASER PRODUCT
DO NOT STARE
INTO BEAM
1000Base-LX
TX
SM
RX
AT-MC1005/3
GIGABIT ETHERNET MEDIA CONVERTER
Campus 2: AT-8216FXL/MT with
AT-MC1005/3
Campus 1: AT-8216FXL/MT with one
100 m (328 ft) maximum
AT-A14 Expansion Module
one AT-A14 Expansion Module
40 km (24.8 mi) maximum
AT-MC1005/3
Single-mode
100 m (328 ft) maximum
Fiber Optic
Twisted Pair