Installation manual

TurboStack Series Hubs
27
Fiber Optic (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 hubs 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 and a
FOIRL node at the other, the limitation would revert to the lesser distance
of 1 km (3,280 ft.).
AT-TS12FS/ST, SC, and SM 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.
Connecting a network device to one of the fiber optic ports on the
AT-TS12FS/ST, SC, SM models
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 the Link indicator to illuminate. If it does, connect the other
of the pair to TX. If Link indicator stays off, unplug the connector from
RX and use the other of the pair.
Fiber Optic Connectors
Fiber optic hubs use one pair of ST, one pair of SC, or one pair of SM type
connectors per port.
If your existing network uses ST and SMA systems, an ST-SMA, ST-SC, or
an SMA-SC hybrid cable is commercially available. This cable is a
one-meter duplex fiber optic cable with an ST, SC, or SMA connector on
one end and a different one of the three connector types on the other. It
therefore allows easy conversion from one type of connector to the other.
Figure 17 shows the ST (Straight Tip) model whose attachment points
connect bayonet-style.
Figure 17: ST Connector for
Fiber Optic Cabling