AT-3624TR/3648TR Installation Manual - Allied Telesis

CentreCOM 3600 Series Hub/Repeaters
Front
Port
activity
LEDs
AUI
port
RS232
port
Hub
status
LEDs
6 ST ports
Figure 24: AT-3606F/ST Front
and Back Panels
Back
Firmware
cassette
port
Interrepeater
bus port
Fiber Optic (FOIRL, 10BASE-FL) Wiring Specifications
The IEEE FOIRL standard limits a fiber segment length to 1 km (3,280 ft.).
That is, the fiber optic cable that connects two repeaters is limited to 1 km
(3,280 ft.). On the other hand, the more recent IEEE 10BASE-FL standard
limits a fiber segment length to 2 km (6,560 ft.). Note, however, that this
only applies to topologies in which one 10BASE-FL node connects to
another 10BASE-FL node. You can intermix 10BASE-FL and FOIRL
nodes, but if the cable connects a 10BASE-FL node at one end with a
FOIRL node at the other, the segment length is limited to 1 km (3,280 ft.).
AT-3606F/SM, SC, and ST hubs support 62.5/125 micron and 50/125
micron duplex optical fiber cable (duplex refers to fiber optic cable pairs).
Normally, duplex fiber optic cable is labeled TX or TD (transmit) and RX or
RD (receive). This means it has a dedicated transmit cable and a dedicated
receive cable. You must connect the receiving port (RX or RD) on one
device to the transmitting (TX or TD) port on a second device for proper
connectivity.
To connect a network device to one of the fiber optic ports on an AT-3606F
Series hub:
1. Attach both connectors at one end of the cable to the TX and RX ports
on the network device.
2. Connect one of the paired connectors at the other end of the cable to the
RX port on the hub.
3. Check for Link indicator to illuminate.
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