Back-to-back topology, Chapter 1: overview 28, Multi-mode fiber optic twisted pair – Allied Telesis AT-MC1008/SP User Manual
Page 28: Class 1 laser product, L/a 1000 link / act
Chapter 1: Overview
28
Back-to-Back Topology
In some network configurations you may want to interconnect two media
converter in what is referred to as a back-to-back topology. In this
topology, the media converter 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 10 illustrates one AT-9424T/SP switch at
each campus. The switches are interconnected by two AT-MC1008/SP
media converters which provide a connection of up to 15 kilometers (9.32
miles). The 1000Base-T twisted pair ports on the media converters are
connected to the twisted pair ports on the switches, while the 1000Base
SFP ports on the two AT-MC1008/SP media converters are directly
connected to each other.
Note
When using two media converters back-to-back, you must set both
converters to the same mode (in example, the first media converter
is set to Smart MissingLink mode; then the second converter must
also be set to Smart MissingLink mode.)
Figure 10. Back-to-Back Topology
FAULT
RPS
MASTER
POWER
CLASS 1
LASER PRODUCT
STATUS
TERMINAL
PORT
1
3
5
7
9
11
2
4
6
8
10
12
13
15
17
19
21
23R
14
16
18
20
22
24R
AT-9424T/SP
Gigabit Ethernet Switch
1
3
5
7
9
11
13
15
17
19
21
23R
2
4
6
8
10
12
14
16
18
20
22
24R
23
24
L/A
D/C
D/C
L/A
D/C
L/A
1000 LINK / ACT
HDX / COL
FDX
10/100 LINK / ACT
PORT ACTIVITY
L/A
1000 LINK / ACT
SFP
SFP
24
SFP
23
FAULT
RPS
MASTER
POWER
CLASS 1
LASER PRODUCT
STATUS
TERMINAL
PORT
1
3
5
7
9
11
2
4
6
8
10
12
13
15
17
19
21
23R
14
16
18
20
22
24R
AT-9424T/SP
Gigabit Ethernet Switch
1
3
5
7
9
11
13
15
17
19
21
23R
2
4
6
8
10
12
14
16
18
20
22
24R
23
24
L/A
D/C
D/C
L/A
D/C
L/A
1000 LINK / ACT
HDX / COL
FDX
10/100 LINK / ACT
PORT ACTIVITY
L/A
1000 LINK / ACT
SFP
SFP
24
SFP
23
376
AT-MC1008/SP
GIGABIT ETHERNET MEDIA CONVERTER AUTO MDI/MDI-X
1000Base-T
PWR
LINK
ACT
ML
SML
LT
MODE
LINK
ACT
SFP
CLASS 1
LASER PRODUCT
1000Base
PORT 1
PORT 2
AT-MC1008/SP
GIGABIT ETHERNET MEDIA CONVERTER AUTO MDI/MDI-X
1000Base-T
PWR
LINK
ACT
ML
SML
LT
MODE
LINK
ACT
SFP
CLASS 1
LASER PRODUCT
1000Base
PORT 1
PORT 2
Campus 2: AT-9424T/SP
AT-MC1008/SP
Campus 1: AT-9424T/SP
AT-MC1008/SP
Multi-mode
Fiber Optic
Twisted Pair
100 m (328 ft) maximum
100 m (328 ft) maximum
15 km (9.32 mi)