Install Guide Part 3

Installing the SDA Hardware Installation Guide
9-2 Airspan Networks Ltd. 02030311-05
9.1. Overview
The SDA is an Ethernet hub/LAN switch that provides the SPR with DC power,
lightening protection, and Ethernet connectivity to the subscriber’s PCs/network.
The SDA connects to the SPR by a CAT-5 cable.
The SDA provides 10/100BaseT connectivity (depending on the SDA model) to the
subscriber’s PCs or network (up to four PCs depending on the SDA model).
The SDA is located inside the subscriber's premises, typically mounted on a wall or
simply placed on a desktop.
The SDA is available in six models:
! SDA-1: This is a hub that provides one 10BaseT interface (RJ-45 port) with the
subscriber’s PC and/or network (via a hub or LAN switch).
! SDA-4H: This is a hub and provides four 10BaseT ports for interfacing with the
subscriber’s PCs/network. In addition, one of the 10BaseT ports provides
crossover configuration for crossover-cable connection for interfacing with, for
example, other hubs.
! SDA-4S models: Integrated LAN switches, providing four 10/100BaseT
interfaces with the subscriber’s PCs/network. The ports of the SDA-4S models
support Auto Negotiation, allowing automatic configuration for the highest
possible speed link: 10BaseT or 100BaseT, and Full Duplex or Half Duplex
mode. In other words, the speed of the connected device (PC) determines the
speed at which packets are transmitted through the specific port. For example, if
the device (i.e, PC) to which the port is connected is running at 100 Mbps, the
port connection will transmit packets at 100 Mbps. If the device (i.e, PC) to
which the port is connected is running at 10 Mbps, the port connection will
transmit packets at 10 Mbps. In addition, the SDA-4S ports support MDI/MDI-
X automatic crossover, allowing connection to straight-through or crossover
CAT-5 cables
! SDA-4S (standard): Standard integrated LAN switch, providing four
10/100BaseT interfaces to the subscriber’s computers.