Allied Telesis AT-FS238b/2 - Manual (Page 14)

Overview
4
This is illustrated in Figure 4 where one AT-FS238a/1 converter and one AT-
FS238b/1 converter are used to interconnect two subnetworks located at
different campuses 15 km (9.3 mi) apart. This type of topology is commonly
referred to as Back-to-Back. The AT-FS238a/1 converter at Campus 1 sends
data at 1310 nm and receives at 1550 nm while the AT-FS238b/1 converter at
Campus 2 receives data at 1310 nm and sends at 1550 nm.
Figure 4 Back-to-Back Network Topology
Link Mode
Link Mode 100 FULL ACT MODE COL FAULT MASTER PWR AT-8024GB 10Base-T / 100Base-T X Fast Ethernet Switc h RS-232 TERMINAL PO RT
LINK MODE
PORT A LINK MODE
PORT B CLASS 1
LASER PRODUCT
DO NOT STARE INTO BEAM
= Twisted Pair Cable
= Single Fiber Strand
Link Mode
Link Mode 100 FULL ACT MODE COL FAULT MASTER PWR AT-8024GB 10Base-T / 100Base-T X Fast Ethernet Switc h RS-232 TERMINAL PO RT
LINK MODE
PORT A LINK MODE PORT B CLASS 1
LASER PRODUCT
DO NOT STARE INTO BEAM
Link Mode
Link Mode 100 FULL ACT
MODE COL FAULT MASTER PWR AT-8024GB 10Base-T / 100Base-T X Fast Ethernet Switc h RS-232 TERMINAL PO RT
LINK MODE
PORT A
LINK MODE
PORT B CLASS 1
LASER PRODUCT
DO NOT STARE INTO BEAM
Link Mode
Link Mode
100 FULL ACT MODE COL FAULT MASTER PWR AT-8024 10Base-T / 100Base- TX Fast E thernet Sw itch
RS-232 T ERMINAL PORT
Link Mode
Link Mode 100 FULL ACT MODE COL FAULT MASTER PWR AT-8024 10Base-T / 100Base -TX Fast E thernet S witch
RS-232 T ERMINAL PORT
Link Mode
Link Mode 100 FULL ACT MODE COL FAULT MASTER PWR AT-8024 10Base-T / 100Base- TX Fast E thernet S witch
RS-232 T ERMINAL PORT
SINGLE MODE 1550TX/1310RX
AT-FS238b/1
SINGLE MODE 1310TX/1550RX
Campus 1 Campus 2
AT-FS238b/1
AT-FS238a/1
15 km (9.3 mi)