A2H124-24FX SecureStack A2Fast Ethernet Switches

The A4 Fast Ethernet switches are store and forward stackable switches that can be adapted and
scaled to help meet your network requirements. These stackable switches provide a management
platform and an uplink to a network backbone for a stacked group of up to eight A4 switches.
You can also use a redundant power supply with these switches to help prevent downtime due to
an internal power supply failure in the switch or AC power source.
You can install the stackable switch on a flat surface or into a standard 19‐inch rack, and configure
the stackable switch functions using the WebView™ application, CLI switching commands, and/
or SNMP.
The A4 stackable switch can connect to Ethernet networks or workstations through RJ45
connectors, SFP ports, or Gigabit Ethernet ports, depending on your model’s configuration. The
SFP ports support optional pluggable transceivers, which are hot swappable. The 1000Base‐T
built‐in RJ45 stacking ports on the A4 switches can be configured as standard 10/100/1000Base‐T
switch ports when the unit is in standalone mode (not stacked).

A2H124-24FX

The switches have front panel RJ45 ports for connections in a stack configuration. The stacking
cables used for the connections must be standard Category 5 or better UTP cable.

The A4 has power supply redundancy capability when connected to an optional external
redundant power supply:
• STK‐RPS‐150PS, a 150 watt DC power supply for redundant power for A4 switches.
If the internal power supply fails, the RPS automatically assumes the role of the internal power
supply without interrupting network traffic. The internal power supply and RPS each have their
own AC power connection, which enables the connection of each power supply to a different AC
power circuit for additional AC power source redundancy.

Management of the switch can be either in‐band or out‐of‐band. In‐band remote management is
possible using Telnet, Enterasys Networks’ NetSight® management application, or the WebView
application. Out‐of‐band management is provided through the DB9 Console port connector on the
front panel using a VT100 terminal or a VT100 terminal emulator.