AMX NXA-ENET24 - Manual

Installation Guide
NXA-ENET24
Fast Ethernet Switch
For more detailed installation, configuration, programming, and operating
instructions, refer to the NXA-ENET24 Hardware Installation and Software
Management Guides available on-line at www.amx.com.
Overview
The NXA-ENET24 Fast Ethernet switch is specifically designed to protect the
video streams coming from AMX’s MAX units to the Audio Video Modules
(AVM). Standard switches will reduce bandwidth from all applications when there
is heavy data traffic passing through the switch. For streaming audio and video
applications this will cause skipping and jitter in the audio and video feeds. This
is unacceptable for AMX’s applications. As a result, AMX has designed the NXA-
ENET24 to protect the A/V streams when heavy data traffic occurs. Bandwidth is
reduced from other applications such as file transfer, e-mail and web surfing only
when heavy data traffic events occur.
The NXA-ENET24 also provides a full range of features for Layer 2 switching. It
includes a management agent that allows you to configure the features listed in
the products manual. The default configuration can be used for most of the
features provided by this switch. However, there are many options that you could
configure to maximize the switch’s performance for your particular network
environment.
Description of Hardware
Physical Dimensions
The NXA-ENET24 Fast Ethernet switch measures 17.32 x 16.14 x 1.69 inches
(44.0 x 41.0 x 4.3 cm). (See FIG. 1)
10/100BASE-T Ports
The switch base unit contains 24 10BASE-T/100BASE-TX RJ-45 ports. All ports
support automatic MDI/MDI-X operation, so you can use straight-through cables
for all network connections to AVMs, Masters, or to other switches or hubs.
Each of these ports support auto-negotiation, so the optimum transmission
mode (half or full duplex), and data rate (10 or 100 Mbps) can be selected
automatically. If a device connected to one of these ports does not support auto-
negotiation, the communication mode of that port can be configured manually.
Each port also supports IEEE 802.3x auto-negotiation of flow control, so the
switch can automatically prevent port buffers from becoming saturated.
1000BASE-T/SFP Ports
These are combination Gigabit RJ-45 ports with alternate Small Form Factor
Pluggable (SFP) transceiver slots. If an SFP transceiver (purchased separately)
is installed in a slot and has a valid link on the port, the associated RJ-45 port is
disabled.
The 1000BASE-T RJ-45 ports support automatic MDI/MDI-X operation, so you
can use straight-through cables for all network connections to MAX servers, or to
other switches or hubs.
Port and System Status LEDs
The LEDs, which are located on the front panel for easy viewing, are described
in the following tables.
Stack Master Button
The Stack Master button enables one switch in the stack to be selected as the
master. Seven other switches can be stacked together and they should be
placed in "Slave" mode. When operating in a stand-alone configuration the
switch should be in "Master" mode.
Power Supply Receptacle
The standard power receptacle is for the AC power cord. It is located on the rear
panel of the switch.
MAX A/V Network
The switch is an excellent choice for mixed AMX equipment such as the NXA-
WAP 200 G wireless access points, AVMs, Breakout Boxes and MAX. You can
easily build on this basic configuration, adding direct full-duplex connections to
AVMs, Breakout Boxes and WAPs. When the time comes for further expansion,
just connect to another hub or switch via one of the switch’s Fast Ethernet or
Gigabit Ethernet ports.
The switch automatically identifies MAX streams to the AVMs so no
configuration is required by the installer.
Application Notes
1. Full-duplex operation only applies to point-to-point access (such as when a
switch is attached to a workstation, server or another switch). When the
switch is connected to a hub, both devices must operate in half-duplex
mode.
2. Avoid using flow control on a port connected to a hub unless it is actually
required to solve a problem. Otherwise back pressure jamming signals
may degrade overall performance for the segment attached to the hub.
3. As a general rule the length of fiber optic cable for a single switched link
should not exceed:
• 1000BASE-SX: 550 m (1805 ft) using multimode fiber
• 1000BASE-LX: 5 km (3.2 miles) using single-mode fiber
• 100BASE-LH: 70 km (43.5 miles) using single-mode fiber
However, power budget constraints must also be considered when calculating
the maximum cable length for your specific environment.
Installing the Switch
Selecting a Site
Switch units can be mounted in a standard 19-inch equipment rack or on a flat
surface. Be sure to follow the guidelines below when choosing a location.
The site should:
• be at the center of all the devices you want to link and near a power outlet.
• be able to maintain its temperature within 0 to 50 °C (32 to 122 °F), and its
humidity within 5% to 95%, non-condensing
• provide adequate space (approximately two inches) on all sides for proper
air flow
• be accessible for installing, cabling, and maintaining the devices
• allow the status LEDs to be clearly visible
Make sure that twisted-pair cable is always routed away from power lines,
fluorescent lighting fixtures and other sources of electrical interference, such as
radios and transmitters.
FIG. 1 The NXA-ENET24 Fast Ethernet switch
Port Status LEDs
LED Condition Status
1~24
(Link/Act
Mode) On/Flashing
Green Port has established a valid 100 Mbps network
connection. Flashing indicates activity.
On/Flashing
Amber Port has established a valid 10 Mbps network con-
nection. Flashing indicates activity.
Alternate Green/
Amber Port has been disabled by the administrator.
Off There is no valid link on the port.
Ports
Port
Number
Description
1 - 24 Ports 1 - 24 can be used to connect AMX’s Master, AVMs, Breakout
Boxes, WAP 200 Gs and/or other Ethernet based devices requiring 10
or 100 Mbps data throughput.
25 This port provides 10/100/1000 Mbps data throughput and can be
used to support MAX units or stacking other switches together.
26 This port provides 10/100/1000 Mbps data throughput and can be
used to support MAX units, or connections to the LAN/Internet.