User's Manual

Network Cabling Hardware Installation Guide
14-10 Airspan Networks Inc. 02030311-10
14.2.2. Connecting to Hub
The SDA-4S and SDA-4H models can be connected to a hub (e.g. for daisy
chaining). Generally, connecting hubs/switches to other hubs/switches requires
crossover cabling. The ports of the SDA-4S support MDI/MDI-X automatic
crossover, allowing connection of straight-through or crossover cables to any of the
ports. However, for SDA-4H, only the left-most RJ-45 port (port J5) is a crossover
port and can be connected to a hub.
The SDA-4S and SDA-4H cable configurations are as follows:
 Connector: 8-Pin RJ-45
 Cable:
 SDA-4H: crossover-cable
 SDA-4S models: straight-through or crossover cables
 Connector pinouts:
SDA-4H 8-pin RJ-45 (J5)
Pin Function
1 +Tx
2 -Tx
3 +Rx
6 -Rx
Note: Pins not mentioned are not used.
To connect SDA-4S or SDA-4H to a hub:
1. Connect the RJ-45 male, at one end of the cable, to any one of the SDA-4S's
RJ-45 ports (see Figure 14-5), or to the SDA-4H's left-most RJ-45 port - J5
(see Figure 14-6).
2. Connect the RJ-45 male, at the other end of the cable, to a hub.