Back-to-back topology – Allied Telesis AT-MC16 User Manual
Page 21
AT-MC1x Series Installation Guide
11
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 6 illustrates two AT-8224XL switches at different campuses
interconnected by two AT-MC14 media converters. The 10Base-T ports on the
media converters are connected to one 10/100Base-TX port on each switch,
while the 10Base-F ports on the media converters are directly connected
together.
Figure 6 Back-to-Back Topology
REC
LNK
TX
RX
MC14 ETHERNET MEDIA CONVERTER
MDI
MDI-X
FIBER
LINK TEST
10Base-T
REC
LNK
PWR
NML
10Base-F
REC
LNK
TX
RX
MC14 ETHERNET MEDIA CONVERTER
MDI
MDI-X
FIBER
LINK TEST
10Base-T
REC
LNK
PWR
NML
10Base-F
STATUS
RESET
FAULT
RPS
PWR
10BASE-T / 100BASE-TX
FAST ETHERNET SWITCH
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
10BASE-T / 100BASE-TX
1X
3X
5X
7X
2X
4X
6X
8X
9X
11X
13X
15X
10X
12X
14X
16X
17X
19X
21X
23X
18X
20X
22X
24X
A
B
RS-232
TERMINAL PORT
100M LINK / ACTIVITY
10M LINK / ACTIVITY
HALF DUP/ COL
FULL DUP
PORT ACTIVITY
L /A
L /A
D/C
D/C
L /A
D/C
STATUS
RESET
FAULT
RPS
PWR
10BASE-T / 100BASE-TX
FAST ETHERNET SWITCH
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
10BASE-T / 100BASE-TX
1X
3X
5X
7X
2X
4X
6X
8X
9X
11X
13X
15X
10X
12X
14X
16X
17X
19X
21X
23X
18X
20X
22X
24X
A
B
RS-232
TERMINAL PORT
100M LINK / ACTIVITY
10M LINK / ACTIVITY
HALF DUP/ COL
FULL DUP
PORT ACTIVITY
L /A
L /A
D/C
D/C
L /A
D/C
Fiber Optic
Twisted Pair
Campus 1: One AT-8224XL Switch
AT-MC14
Campus 2: One AT-8224XL Switch
100 m (328 ft)
2 km (1.2 mi)
AT-MC14
100 m (328 ft)