Allied Telesis AT-PBC18 - Manual (Page 50)

Installing a Media Converter Module
50
Back-to-back Topology
A back-to-back topology is when two media converters are used to
interconnect the end-nodes. Figure 20 illustrates a back-to-back
topology that uses an AT-PB1001/4 and an AT-MC1001 media converter
to connect two remote campuses. Campus 1 has an AT-8224XL switch
with an AT-A15/SX expansion module connected to the 1000Base-SX
port on the AT-PB1001/4. The 1000Base-LX port on the AT-PB1001/4 is
connected to the 1000Base-LX port on the AT-MC1001. The 1000Base-SX
port on the AT-MC1001 is connected to the AT-8224XL switch at Campus
2.
In this example, the two media converters are used both to extend the
distance of your network and also convert the fiber optic cable from
multimode to single-mode and back again.
Figure 20 Back-to-back Topology
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
AT-A15
1000BASE-X
LINK ACTIVITY
FULL HALF
SINGLE MODE MULTI MODE LNK
LNK TST
M/L ON
LNK
PWR
TX RX
MC1001 GIGABIT ETHERNET MEDIA CONVERTER
CLASS 1 LASER LIGHT DO NOT STARE INTO BEAM
1000Base-LX TX RX 1000Base-SX
M/L ON
PBC18 PWR 1 PWR 2 STATUS LINK 100M FDX RESET
PB102
100Mbps
ML
F X
T
X
R
X
M
M
LK AT
LT
MDI MDI-X
LK AT FD
ML PR
T X
PB103/1
100Mbps
ML
F X
T
X
R
X
M
M
LK AT
LT
MDI MDI-X
LK AT FD
ML PR
T X
PB13
10Mbps
ML
F L
T
X
R
X
M
M
LK RX
LT
MDI MDI-X
LK RX
ML PR
T
PB13
10Mbps
ML
F L
T
X
R
X
M
M
LK RX
LT
MDI MDI-X
LK RX
ML PR
T
PB1001/1
100Mbps
ML
L X
T
X
R
X
S
M
LK
LT
LT SA LT BB
LK
ML PR
T
X
R
X
M
M S X
CLASS 1 LASER PRODUCT
DO NOT STARE INTO BEAM
PB1001/1
100Mbps
ML
L X
T
X
R
X
S
M
LK
LT
LT SA LT BB
LK
ML PR
T
X
R
X
M
M S X
CLASS 1 LASER PRODUCT
DO NOT STARE INTO BEAM
PB102
100Mbps
ML
F X
T
X
R
X
M
M
LK AT
LT
MDI MDI-X
LK AT FD
ML PR
T X
PB103/1
100Mbps
ML
F X
T
X
R
X
M
M
LK AT
LT
MDI MDI-X
LK AT FD
ML PR
T X
PB102
100Mbps
ML
F X
T
X
R
X
M
M
LK AT
LT
MDI MDI-X
LK AT FD
ML PR
T X
PB13
10Mbps
ML
F L
T
X
R
X
M
M
LK RX
LT
MDI MDI-X
LK RX
ML PR
T
PB13
10Mbps
ML
F L
T
X
R
X
M
M
LK RX
LT
MDI MDI-X
LK RX
ML PR
T
PB102
100Mbps
ML
F X
T
X
R
X
M
M
LK AT
LT
MDI MDI-X
LK AT FD
ML PR
T X
PB103/1
100Mbps
ML
F X
T
X
R
X
M
M
LK AT
LT
MDI MDI-X
LK AT FD
ML PR
T X
PB13
10Mbps
ML
F L
T
X
R
X
M
M
LK RX
LT
MDI MDI-X
LK RX
ML PR
T
PB13
10Mbps
ML
F L
T
X
R
X
M
M
LK RX
LT
MDI MDI-X
LK RX
ML PR
T
PB13
10Mbps
ML
F L
T
X
R
X
M
M
LK RX
LT
MDI MDI-X
LK RX
ML PR
T
PB1001/1
100Mbps
ML
L X
T
X
R
X
S
M
LK
LT
LT SA LT BB
LK
ML PR
T
X
R
X
M
M S X
CLASS 1 LASER PRODUCT
DO NOT STARE INTO BEAM
PB1001/1
100Mbps
ML
L X
T
X
R
X
S
M
LK
LT
LT SA LT BB
LK
ML PR
T
X
R
X
M
M S X
CLASS 1 LASER PRODUCT
DO NOT STARE INTO BEAM
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
AT-A15
1000BASE-X
LINK
ACTIVITY
FULL HALF
Campus 2: AT-8224XL with one
AT-A15/SX Expansion Module
Campus 1: AT-8224XL with one
AT-A15/SX Expansion Module
550 m (1,804 ft) maximum
550 m (1,804 ft) maximum
AT-PB1001/4 Module
Cable Legend
Single-mode Fiber
Multimode Fiber
AT-MC1001
Media Converter
70 km (43.4 mi) maximum