Page 1
HP 1820 Switch Series
Installation and Getting Started Guide
HP 1820-8G Switch (J9979A)
HP 1820-24G Switch (J9980A)
HP 1820- 48G Swi tch ( J 9 981 A )
HP 1820-8G-PoE+ (65W) Switch (J9982A)
HP 1820-24G-PoE+ (185W) Switch (J9983A)
HP 1820-48G-PoE+ (370W) Switch (J9984A)
Power over Ethernet
Page 2
Page 3
HP 1820 Switch Series
Installation and Getting Started Guide
Page 4
© Copyright 2015 Hewlett-Packard Development Company, L.P.
The information contained herein is subject to change without notice.
This document contains proprietary information, which is protected by copyright. No part of this document may be photocopied,
reproduced, or translated into another language without prior written consent of Hewlett-Packard.
Manual Part Number
5998-5835
February 2015
Applicable Products
HP 1820-8G Switch (J9979A)
HP 1820-24G Switch (J9980A)
HP 1820-48G Switch (J9981A)
HP 1820-8G-PoE+ (65W) Switch (J9982A)
HP 1820-24G-PoE+ (185W) Switch (J9983A)
HP 1820-48G-PoE+ (370W) Switch (J9984A)
Safety
Before installing and operating this product, please read the “Installation Precautions” in Chapter 2, “Installing the Switch”, and the safety
statements in General Safety and Regulatory Information booklet included with the product.
Disclaimer
HEWLETT-PACKARD COMPANY MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS MATERIAL,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. Hewlett-Packard shall not be liable for errors contained herein or for incidental or consequential damages in
connection with the furnishing, performance, or use of this material.
The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and
services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors
or omissions contained herein.
Hewlett-Packard assumes no responsibility for the use or reliability of its software on equipment that is not furnished by Hewlett-Packard.
War ranty
For the latest license and warranty information, visit www.hp.com/networking/support.
A copy of the specific warranty terms applicable to your Hewlett-Packard products and replacement parts can be obtained from your HP
Sales and Service Office or authorized dealer.
Page 5
Contents
1 Switch Overview
Switch Hardware Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Network Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Mode Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Reset Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Power Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Switch Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
2 Installing the Switch
Included Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Installation Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
1. Prepare the Installation Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
2. Verify the Switch Passes Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
3. Mount the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
4. Connect the Switch to a Power Source . . . . . . . . . . . . . . . . . . . . . . 2-13
5. Connect the Network Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
6. Installing or Removing SFPs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
3 Configuring the Switch
Initial Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Using the 192.168.1.1 IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Where to Go From Here . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
4 Troubleshooting
Basic Troubleshooting Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Diagnosing with the LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
LED patterns for General Switch Troubleshooting . . . . . . . . . . . . . . . 4-2
5
Page 6
Diagnostic Tips: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
LED Patterns for PoE Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Testing the Switch by Resetting It . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Restoring to Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
HP Customer Support Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Before Calling Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
A Specifications
Switch Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Cabling and Technology Information Specifications . . . . . . . . . . . . . . . . A-4
Technology Distance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5
Mode Conditioning Patch Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5
Installing the Patch Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6
Twisted-Pair Cable/Connector Pin-Outs . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
Straight-through Twisted-Pair Cable for
10 Mbps or 100 Mbps Network Connections . . . . . . . . . . . . . . . . . . . . A-9
Crossover Twisted-Pair Cable for
10 Mbps or 100 Mbps Network Connection . . . . . . . . . . . . . . . . . . . . A-10
Straight-Through Twisted-Pair Cable for
1000 Mbps Network Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-11
B EMC Regulatory Statements
Regulatory Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Index
6
Page 7
Switch Overview
1
The HP 1820 Switch Series are multiport switches that can be used to build
high-performance switched workgroup networks. These switches are storeand-forward devices that offer low latency for high-speed networking. Three
of the switches also support the IEEE 802.3at standard for providing PoE+
power to connected devices.
Throughout this manual, these switches will be referred to as the 1820-8G
Switch, 1820-24G Switch, 1820-48G Switch, 1820-8G-PoE+ Switch, 1820-24GPoE+ Switch, and the 1820-48G-PoE+ Switch.
■ The 1820-8G Switch has 8 auto-sensing 10/100/1000BASE-T RJ-45 ports.
Port 1 is a Power over Ethernet Powered Device (PoE PD) port. The
switch can be powered by a network connection to port 1 from PoE power
sourcing equipment (PSE), such as a PoE switch.
■ The 1820-24G Switch has 24 auto-sensing 10/100/1000BASE-T RJ-45 ports
and two SFP slots for supported HP SFP fiber-optic transceivers (ports
25 and 26).
■ The 1820-48G Switch has 48 auto-sensing 10/100/1000BASE-T RJ-45 ports
and four SFP slots for supported HP SFP fiber-optic transceivers (ports
49 to 52).
■ The 1820-8G-PoE+ Switch has 8 auto-sensing 10/100/1000BASE-T RJ-45
ports. The switch supports the IEEE 802.3at standard and is capable of
providing 65 watts of PoE power through ports 1-4.
■ The 1820-24G-PoE+ Switch has 24 auto-sensing 10/100/1000BASE-T RJ-45
ports and two SFP slots for supported HP SFP fiber-optic transceivers
(ports 25 and 26). The switch supports the IEEE 802.3at standard and is
capable of providing 185 watts of PoE power through ports 1-12.
■ The 1820-48G-PoE+ Switch has 48 auto-sensing 10/100/1000BASE-T RJ-45
ports and four SFP slots for supported HP SFP fiber-optic transceivers
(ports 49 to 52). The switch supports the IEEE 802.3at standard and is
capable of providing 370 watts of PoE power through ports 1-24.
These switches can be directly connected to computers, printers, and servers
to provide dedicated bandwidth to those devices, and you can build a switched
network infrastructure by connecting the switch to hubs, other switches, or
routers. In addition, these switches offer network management capabilities.
1-1
Page 8
Switch Overview
HP 1820-8G Switch (J9979A)
Power and Fault/
Locator LEDs
10/100/1000BASE-T RJ-45 ports
Reset button
Link/Act and Speed LEDs
PoE PD port
HP 1820-24G Switch (J9980A)
Power and Fault/
Locator LEDs
Link/Act and Speed LEDs
10/100/1000BASE-T RJ-45 ports
Reset button
SFP slots
HP 1820-48G Switch (J9981A)
Power and Fault/
LocatorLEDs
Link/Act and Speed LEDs
10/100/1000BASE-T RJ-45 ports
Reset button
SFP slots
Switch Hardware Features
Switch Hardware Features
1-2
Page 9
Switch Hardware Features
HP 1820-8G-PoE+ (65W) Switch (J9982A)
Link/Act and Mode LEDs
10/100/1000BASE-T RJ-45 ports
Power and Fault/
Locator LEDs
Mode button
Reset button
PoE+ ports 1-4
HP 1820-24G-PoE+ (185W) Switch (J9983A)
Link/Act and Mode LEDs
10/100/1000BASE-T RJ-45 ports
SFP slots
Power and Fault/
Locator LEDs
Reset button
Mode button
PoE+ ports 1-12
HP 1820-48G-PoE+ (370W) Switch (J9984A)
Link/Act and Mode LEDs
10/100/1000BASE-T RJ-45 ports
SFP slots
Power and Fault/
Locator LEDs
Reset button
Mode button
PoE+ ports 1-24
Switch Overview
1-3
Page 10
Switch Overview
Switch Hardware Features
Network Ports
■ Auto-sensing 10/100/1000BASE-T ports.
All these ports have the “Auto-MDIX” feature, which means that you can
use either straight-through or crossover twisted-pair cables to connect
any network devices to the switch.
■ Power-over-Ethernet or PoE ports.
The HP 1820 PoE+ switches support the IEEE 802.3at standard, which
allows IP telephones, wireless LAN Access Points, and other appliances
to receive power as well as data over existing LAN cabling. For further
information regarding PoE power, see the HP Power over Ethernet (PoE/
PoE+) Planning and Implementation Guide, which is on the HP Web site
at www.hp.com/support/manuals.
■ PoE PD port (1820-8G Switch only).
A network connection to the PoE PD port from a PoE PSE device powers
on the switch.
■ SFP slots for fiber or copper uplinks.
Using HP SFPs, these products support optional network connectivity
with the following speeds and technologies:
Transceiver Form-
Factor and
Connector
1
1-4
Speed Technology
100 Mbps
1 Gbps
1
For supported transceivers, visit www.hp.com/networking/support.
100-FX Fiber (multimode) LC
1000-T Copper (twisted-pair) RJ-45
1000-SX Fiber (multimode) LC
1000-LX Fiber (multimode or single mode) LC
Cabling
SFP Connector
– In the first textbox, type J4858 (for 100-Mb and Gigabit information).
– Select any of the products that display in the dropdown list. Then click Display
selected.
– Select Product support information. Then click Manuals and find the Transceiver
Support Matrix.
For technical details of cabling and technology, see “Cabling and Technology Information
Specifications” in Appendix A.
Page 11
Switch Hardware Features
Switch Overview
LEDs
The front panel of the switch provides status LEDs for system monitoring.
The following table details the functions of the various indicators.
LED State Meaning
Power
(green)
Fault/Locator
(orange)
Link/Act
(green)
Spd
Mode - Spd
(green)
Mode - PoE
(green)
* The blinking behavior is a 6 second on/off cycle; 5 seconds on, 1 second off.
** The blinking behavior is a 2 second on/off cycle; 1 second on, 1 second off.
*** The blinking behavior is a 4 second on/off cycle; 3 seconds on, 1 second off.
‡
(HP 1820 PoE+ switches only) Press the Mode button in for PoE mode, leave the Mode button out for Spd mode.
‡
‡
On The switch is receiving power.
Blinking* (1820-8G only) Power is available on the PoE In port (Port 1).
Off The switch is NOT receiving power.
On On briefly after the switch is powered on or reset, at the beginning of switch self
test. If the LED remains on, it indicates a detected hardware failure during the self
test.
Blinking** A fault has occurred on the switch or one of the switch ports. The Link LED for the
port with the fault will blink simultaneously.
Blinking*** The LED is used to locate a specific switch in an area full of switches. The LED
blinks for 30 minutes when activated through the switch software.
Off The normal state; indicates that there are no fault conditions on the switch.
On The port is enabled and receiving a link indication from the connected device.
Off One of these condition exists:
• no active network cable is connected to the port
• the port is not receiving link beat or sufficient light
• Green Mode has been enabled.
Blinking Indicates that there is network activity on the port.
If the Link/Act LED is blinking simultaneously with the Fault/Locator LED, it
indicates a fault on the port. The blinking behavior (1 second on, 1 second off) is
the same as the Fault/Locator LED.
On Indicates the port is operating at 1000 Mbps.
Flashing Indicates the port is operating at 100 Mbps.
Off Indicates the port is operating at 10 Mbps.
On Indicates the Port LEDs are lit for ports that are providing PoE power to the
connected device.
Blinking** There is an oversubscription condition (not enough PoE power available) or the
port has experienced a fault condition for PoE delivery.
1-5
Page 12
Switch Overview
Switch Hardware Features
Mode Button
The HP 1820 PoE+ switches have one Mode LED per port. The Mode LED
shows either the port speed or the PoE status. In PoE mode, it shows whether
the port is configured to provide PoE power. The operation of the Mode LED
is controlled by the Mode select button. Press the Mode button in to select the
PoE mode, or leave the button in its out position for Spd (speed) mode.
Reset Button
The Reset button is used to restore Factory Default settings, reset the switch
while it is powered on, and enable Smart Recover mode.
■ Resetting the Switch — Press and release the button. This action clears
any temporary error conditions that may have occurred and executes the
switch self test.
■ Restoring Factory Default Configuration — Press and hold down for
over 5 seconds, the switch will then complete its self test and begin
operating with its configuration restored to the factory default settings.
Any configuration changes you may have made through the web browser
interface are removed.
■ Enabling Smart Recover Mode — When the switch is booting the Fault
LED flashes rapidly three times in succession. Within 2 seconds of the
third LED flash, press and hold down the Reset button for 5 seconds. Once
the button press is detected, the Fault LED blinks for half a second each
second until the button is released.
1-6
For more information on Smart Recover mode, see the HP 1820 Switch
Series Management and Configuration Guide.
Power Connector
The 1820-24G, 1820-24G-PoE+, 1820-48G, and 1820-48G-PoE+ Switches do not
have a power switch, they are powered on when connected to an active AC
power source. The switches automatically adjust to any voltage between 100127 and 200-240 volts and either 50 or 60 Hz. There are no voltage range
settings required.
The 1820-8G and 1820-8G-PoE+ Switches do not have a power switch, they
are powered on when the external AC/DC power adapter is connected to the
switch and to a power source. The external AC/DC power adapter supplies
12 volts DC to the switch and automatically adjusts to any AC voltage between
100-240 volts and either 50 or 60 Hz. No voltage range settings are required.
The 1820-8G Switch can also be powered on by a PoE PD connection to Port 1.
Page 13
Switch Overview
Switch Features
Switch Features
The features of the HP 1820 Switches include:
■ 8, 24, or 48 auto-sensing 10/100/1000BASE-T RJ-45 ports.
■ 2 or 4 SFP slots for HP SFP transceivers (1820-24G, 1820-24G-PoE+, 1820-
48G, and 1820-48G-PoE+ Switches only)
■ plug-and-play networking—all ports are enabled—just connect the
network cables to active network devices and your switched network is
operational.
■ IEEE 802.3ab Auto MDI /MDI-X on all twisted-pair ports, meaning that all
connections can be made using straight-through twisted-pair cables.
Cross-over cables are not required, although they will also work. The pin
operation of each port is automatically adjusted for the attached device:
if the switch detects that a 10/100/1000 Mbps switch or hub is connected
to the port, it configures the port as MDI; if the switch detects that a 10/
100/1000 Mbps end-node device is connected to the port, it configures the
port as MDI-X.
■ all switches support IEEE 802.3az Energy Efficient Ethernet (EEE)
features that reduce power consumption when connected with EEEcompliant client devices.
■ automatic learning of MAC addresses in each switch’s 8K-address (8- and
24-port switches) or 16K-address (48-port switches) forwarding table.
■ automatically negotiated full-duplex operation for all 10/100/1000BASE-T
RJ-45 ports when connected to other auto-negotiating devices
■ easy management of the switch through several available interfaces:
• Web browser interface — an easy to use built-in graphical interface
that can be accessed from common Web browsers.
• Intelligent Management Center (iMC) — allows network
administrators to discover and map the switches within their network
and launch the built-in graphical interface from within iMC to
configure the switches.
■ support for up to 64 IEEE 802.1Q-compliant VLANs so you can divide the
attached end nodes into logical groupings that fit your business needs.
■ support for up to 16 trunks (48-port switches) so you can assign physical
links to one logical link (trunk) that functions as a single, higher-speed
link providing dramatically increased bandwidth.
■ support for many advanced features to enhance network performance—
for a description, see the Management and Configuration Guide.
■ download of new switch software for product bug fixes.
1-7
Page 14
Switch Overview
Switch Features
1-8
Page 15
Installing the Switch
The HP 1820 Switches are easy to install. They come with an accessory kit
that includes the brackets for mounting the switches in a standard 19-inch
telco rack, in an equipment cabinet, and with rubber feet that can be attached
so the switches can be securely located on a horizontal surface. The brackets
are designed to allow mounting of the switches in a variety of locations and
orientations. This chapter shows how to install the switches.
Included Parts
The following components ship with an HP 1820 Switch:
■ Documentation kit
• Quick Setup Guide
• Safety and Regulatory information
• Software License, Warranty, and Support information
2
■ Accessory kits:
1820-8G and 1820-8G-PoE+ Switch
Kit number 5066-2232
• two rack mounting brackets
• eight 8-mm M4 screws to attach the
mounting brackets to the switch
• four 5/8-inch number 12-24 screws to
attach the switch to a rack
• four rubber feet
Kit number 5066-0621
• three 3/4” (20-mm M4) screws for wall
and under-table mounting
• three wall anchors
• cable tie for power cord
2-1
Page 16
Installing the Switch
Included Parts
1820-24G, 1820-24G-PoE+,
1820-48G-PoE+ Switch
and 1820-48G Switch
Kit number 5069-6535
• two wall/table mounting brackets
• eight 8-mm M4 screws to attach the
mounting brackets to the switch
• four 5/8-inch number 12-24 screws to
attach the switch to a rack
• four rubber feet
■ HP 1820 24- and 48-port switch AC power cords, one of the following:
Country/Region
Argentina
Australia/New Zealand
Brazil
Chile
China
Continental Europe
Denmark
India
Israel
Japan
Switzerland
South Africa
South Korea
Taiwan
Thailand
UK/Hong Kong/Singapore/Malaysia
US/Canada/Mexico
1
The cord for the HP 1820-48G-PoE+ Switch supports a higher amperage and uses a C16
connector.
Kit number 5069-5705
• two rack mounting brackets
• eight 8-mm M4 screws to attach the
mounting brackets to the switch
• four 5/8-inch number 12-24 screws to
attach the switch to a rack
• four rubber feet
Kit number 5092-0769
• two wall/table mounting brackets
HP 1820-24G,
HP 1820-48G,
and
HP 1820-48G-PoE+
HP 1820-24G-PoE+
8120-6869
8121-0834
8121-1069
8120-6980
8120-8377
8120-6802
8120-6806
8121-0780
8121-1035
8120-6804
8120-6807
8121-0919
8120-6811
8121-0964
8121-0673
8120-6809
8120-6805
8120-8375
8121-0857
8121-1132
8120-8389
8121-1034
8120-5336
8120-5340
8120-5341
8121-1009
8120-5342
8120-5339
8120-5341
8120-5336
8121-0967
8121-0671
8120-5334
8121-0973
1
2-2
Page 17
Installing the Switch
Included Parts
■ The 1820-8G external AC/DC power adapters, one of the following:
• Universal Inline AC/DC Power Adapter
All countries/regions 5066-1122
Power Cords for Inline AC/DC Power Adapter
Australia/New Zealand
Thailand
China
India
Israel
Japan
South Africa
South Korea
Taiwan
United Kingdom/Hong Kong/Singapore/Malaysia
Brazil
Argentina
Chile
8121-0870
8121-0664
8120-8373
8121-0702
8120-6314
8120-6316
8120-6317
8120-6314
8121-0963
8120-8699
8121-1081
8120-8367
8121-0514
• Wall Plug-in AC/DC Power Adapters
(AC Power cords are not used)
United States/Canada/Mexico
5184-5863
Continental Europe/Denmark/Norway/Sweden/Switzerland/
Israel/Vietnam/Indonesia
■ The 1820-8G-PoE+ external AC/DC power adapters and power cords, one
5184-5864
of the following:
• Universal Inline AC/DC Power Adapter (model PA2)
All countries/regions 5066-2164
Power Cords for Inline AC/DC Power Adapter
Australia/New Zealand
China
Continental Europe
Denmark
India
Israel
Japan
South Africa
South Korea
Switzerland
Taiwan
Thailand
United Kingdom/Hong Kong/Singapore/Malaysia
United States/Canada/Mexico
Brazil
Argentina
Chile
8121-0834
8120-8377
8120-6802
8120-6806
8121-0780
8121-1035
8120-6804
8121-0919
8120-6811
8120-6807
8121-0964
8121-0673
8120-6809
8120-6805
8121-1069
8120-6869
8120-6980
Japan Power Cord
Warning
2-3
Page 18
Installing the Switch
Included Parts
Installation Precautions
Follow these precautions when installing the switch.
WARNING
Cautions
■ The rack or cabinet should be adequately secured to prevent it
from becoming unstable and/or falling over.
Devices installed in a rack or cabinet should be mounted as low
as possible, with the heaviest devices at the bottom and progressively lighter devices installed above.
■ When wall mounting, to meet national and international safety
requirements, wall mount with the network ports facing up. The
side vents cannot be placed up or downward.
■ When installing the switch, the AC outlet should be located near the
switch and should be easily accessible in case the switch must be
powered off.
■ Ensure that the AC power source circuits are properly grounded.
■ Use only the AC/DC power adapter and power cord (if applicable),
supplied with the switch. Use of other adapters or power cords, including
those that came with other HP Networking products, may result in
damage to the equipment.
For those switches that use a power cord, if your installation requires a
different power cord than the one supplied with the switch, be sure to
use a power cord displaying the mark of the safety agency that defines
the regulations for power cords in your country. The mark is your
assurance that the power cord can be used safely with the switch.
2-4
■ Ensure the switch does not overload the power circuits, wiring, and over-
current protection. To determine the possibility of overloading the supply
circuits, add together the ampere ratings of all devices installed on the
same circuit as the switch and compare the total with the rating limit for
the circuit. The maximum ampere ratings are usually printed on the
devices near the AC power connectors.
■ Do not install the switch in an environment where the operating
ambient temperature might exceed 40°C (104°F). This includes a fullyenclosed rack. Ensure the air flow around the sides and back of the
switch is not restricted. Leave at least 7.6 cm (3 inches) for cooling.
■ Ensure all port covers are installed when the port is not in use.
Page 19
Installing the Switch
Installation Procedure
Installation Procedure
These steps summarize your switch installation. The rest of this chapter
provides details on these steps.
1. Prepare the installation site (page 2-6). Make sure the physical
environment into which you will be installing the switch is properly
prepared, including having the correct network cabling ready to connect
to the switch and having an appropriate location for the switch. See page
2-6 for some installation precautions.
2. Verify the switch passes self test (page 2-6). Plug the switch into a
power source and observe that the LEDs on the switch’s front panel
indicate correct switch operation.
3. Mount the switch (page 2-9). The HP 1820 24- and 48-port switches can
be mounted in a 19-inch telco rack, in an equipment cabinet, on a wall,
under a table, or on a horizontal surface. The HP 1820 8-port switches can
be mounted on a wall, under a table, or on a horizontal surface.
4. Connect power to the switch (page 2-13). Once the switch is mounted,
plug it into the main power source.
5. Connect the network devices (page 2-14). Using the appropriate
network cables, connect the network devices to the switch ports.
6. (Optional) Install SFP transceivers (page 2-6). The HP 1820 24- and
48-port switches have slots for installing SFP transceivers. Depending on
where you install the switch, it may be easier to install the SFPs first. SFPs
can be hot swapped—they can be installed or removed while the switch
is powered on.
At this point, your switch is fully installed. See the rest of this chapter if you
need more detailed information on any of these installation steps.
2-5
Page 20
Installing the Switch
Installation Procedure
1. Prepare the Installation Site
Be sure to follow the guidelines below to ensure proper operation when
installing the switch into a network:
■ Verify that copper and fiber cabling meets the requirements of the
“Cabling and Technology Information Specifications” in Appendix A.
■ Protect the switch from radio frequency interference emissions.
■ Use electrical surge suppression.
■ Use safe connections with no damaged cables, connectors, or shields.
Installation Space Requirements
Switch
Orientation
Front
Back
Sides At least 7.6 cm (3 inches) for cooling, except if the switch is installed in an
Clearance Requirements
At least 7.6 cm (3 inches) of space for the twisted-pair and fiber-optic
cabling.
At least 3.8 cm (1 1/2 inches) of space for the power cord and switch cooling.
open EIA/TIA rack.
2. Verify the Switch Passes Self Test
Before mounting the switch, verify it is working properly by plugging it into a
power source and confirming that it passes self test.
1. For the HP 1820 24- and 48-port switches, connect the power cord
supplied with the switch to the power connector on the back of the switch,
and then into a properly grounded electrical outlet.
For the HP 1820 8-port switches, connect the AC/DC adapter’s power cord
to the power connector on the back of the switch, and then plug the AC/
DC power adapter into a nearby properly grounded electrical outlet.
2-6
Page 21
Connect the power cord to the switch
and an AC power outlet
HP 1820-8G Switch
HP 1820 24- and 48-Port Switches
Connect wall plug-in AC/DC power adapter
to the switch and an AC power outlet
HP 1820-8G-PoE+ Switch
Connect inline AC/DC power adapter to the
switch and an AC power outlet
Installing the Switch
Installation Procedure
Note The HP 1820 24- and 48-port switches do not have a power switch. They are
powered on when the power cord is connected to the switch and to a power
source. For safety, the power outlet should be located near the switch
installation.
The switches automatically adjusts to any voltage between 100-127 or 200-240
volts and either 50 or 60 Hz. There are no voltage range settings required.
2-7
Page 22
Installing the Switch
Power and Fault/
Locator LEDs
Port Link/Act and
Speed LEDs
Port Link/Act and
Mode LEDs
Installation Procedure
The HP 1820 8-port switches also do not have a power switch. They are
powered on when the external AC/DC power adapter is connected to the
switch and the adapter power cord to a power source. The external AC/DC
power adapter automatically adjusts to any voltage between 100-240 volts and
either 50 or 60 Hz.
2. Check the LEDs on the switch as described below.
2-8
When the switch is powered on, it performs its diagnostic self test. The
self test takes approximately 45 seconds to complete.
Self Test LED Behavior:
During the self test:
• Initially, the Power, Fault/Locator, and all port LEDs turn on.
• After several seconds, the Power and Fault/Locator LEDs remain on,
and the port LEDs turn off. Then each port Link LED is sequentially
turned on, then off.
Page 23
Installing the Switch
Installation Procedure
•The Fault/Locator LED turns off when the self test completes.
When the self test completes successfully:
•The Power LED remains on.
•The Fault/Locator LED stays off.
• The port LEDs on the front of the switch go into their normal opera-
tional mode:
– If the ports are connected to active network devices, the Link/Act
LEDs stay on or may be blinking to indicate port activity. The Spd
LEDs turn on for 1000 Mbps links, blink for 100 Mbps links, or
stay off for 10 Mbps links. On the PoE+ switches, the Mode LEDs
behave according to the mode selected. In the default mode (Spd),
the Mode LEDs should be on for 1000 Mbps links, blink for 100
Mbps links, or stay off for 10 Mbps links.
– If the ports are not connected to active network devices, the Link/
Act and Spd LEDs will stay off.
If the LED display is different than what is described above, the self test
has not completed correctly. Refer to
“Troubleshooting”
for diagnostic
help.
3. Remove power to the switch before mounting.
3. Mount the Switch
The switch can be mounted in these ways:
■ on a horizontal surface
■ on a wall
■ under a table
■ in a rack or cabinet
Rack or Cabinet Mounting
The switches are designed to be mounted in any EIA-standard 19-inch telco
rack or communication equipment cabinet. Note that the mounting brackets
have multiple mounting holes and can be rotated allowing for a wide variety
of mounting options.
WARNING For safe operation, please read the “Installation Precautions” on
page 2-4 before mounting the switch.
2-9
Page 24
Installing the Switch
8 mm
M4 screws
Install 12-24
screws
Installation Procedure
Equipment
Cabinet
Note
The screws supplied with the switch are the correct threading for standard
EIA/TIA open 19-inch racks. If you are installing the switch in an equipment
cabinet such as a server cabinet, use the clips and screws that came with the
cabinet in place of the screws that are supplied with the switch.
Complete the following step 1 to attach brackets to the switch. Then, plan
which four holes you will be using in the cabinet and install all four clips. Then
proceed to step 2 to install the switch in the cabinet.
1. Use a #1 Phillips (cross-head) screwdriver and attach the mounting
brackets to the switch with the included 8-mm M4 screws.
Note The mounting brackets have multiple mounting holes and can be rotated
allowing for a wide variety of mounting options. These include mounting the
switch so its front face is flush with the face of the rack, as shown in the
illustration.
2-10
2. Hold the switch with attached brackets in the rack and move it vertically
until rack holes line up with the bracket holes, then insert and tighten the
four 12-24 screws holding the brackets to the rack.
Page 25
Installing the Switch
5/8-inch
wood screws
Installation Procedure
Wall or Under-TableMounting
You can mount the HP 1820 24- and 48-port switches on a wall with either the
front or rear panel facing up.
WARNING For safe operation, please read the “Installation Precautions” on
page 2-4 before mounting the switch.
Wall mount the switch with the network ports facing up or down.
Caution The switch should be mounted only to a wall or wood surface that is at least
1/2-inch (12.7 mm) plywood or its equivalent.
To mount the HP 1820 24- and 48-port switches, follow these steps:
1. Use a #1 Phillips (cross-head) screwdriver and attach the mounting
brackets to the switch with the included 8-mm M4 screws.
2. Attach the switch to the wall or wood surface with two 5/8-inch number
12 wood screws (not included).
To mount the HP 1820 8-port switches, follow these steps:
1. In the required location, mark the position for the mounting screws. The
hole-to-hole distance is 3.54 inch (90 mm).
2. Use a #1 Phillips (cross-head) screwdriver and two of the included 20-mm
M4 tap screws. Set the screw heads approximately 2 mm away from the
mounting surface to allow the switch to slide onto the screws.
2-11
Page 26
Installing the Switch
20-mm M4
tap screws
Wall anchors
Installation Procedure
Wall anchors are included in the accessory kit for use with plastered brick
or concrete walls.
3. For under-table mounting, a third 20-mm M4 tap screw can be placed
against one side of the switch to secure it in place.
Horizontal Surface Mounting
2-12
Place the switch on a table or other horizontal surface. The switch comes with
rubber feet in the accessory kit that can be used to help keep the switch from
sliding on the surface.
Attach the rubber feet to the four corners on the bottom of the switch within
the embossed angled lines. Use a sturdy surface in an uncluttered area. You
may want to secure the networking cables and switch power cord to the table
leg or other part of the surface structure to help prevent tripping over the
cords.
Page 27
Installing the Switch
Installation Procedure
Using a Kensington Security Cable
To prevent unauthorized removal of the switch, you can use a Kensington Slim
MicroSaver security cable (not included) to attach the switch to an immovable
object.
4. Connect the Switch to a Power Source
1. For the HP 1820 24-port and 48-port switches, plug the included power
cord into the switch’s power connector and into a nearby AC power
source.
For the HP 1820 8-port switches, plug the AC/DC adapter’s power cord
into the switch, and then plug the AC/DC power adapter into a nearby AC
power source.
2-13
Page 28
Installing the Switch
100-ohm unshielded or shielded twistedpair cable:
• Category 3, 4, or 5 for 10 Mbps ports
• Category 5 only for 100 Mbps ports
• Category 5, 5e, or 6 for 1000 Mbps ports
Maximum distance: 100 meters
Installation Procedure
2.) Re-check the LEDs during self test. See “Self Test LED Behavior” on
page 2-8.
3. For the HP 1820 8-port switches, use the included cable tie to secure the
power cord to the switch.
5. Connect the Network Cables
Connect the network cables, from the network devices or your patch panels,
to the fixed RJ-45 ports on the switch or to any SFP transceivers you have
installed in the switch.
2-14
When a network cable from an active network device is connected to the port,
the port LEDs for that port should go on. If the port LEDs do not go on when
the network cable is connected to the port, see “Diagnosing with the LEDs”
on page 4-2.
Page 29
Installing the Switch
Installation Procedure
6. Installing or Removing SFPs
You can install or remove an SFP from an SFP slot without having to power
off the switch. Use only HP SFPs (see table on page 1-4).
Caution Hot swapping transceivers is supported. You can install or remove a
transceiver with the switch powered on, a reset will not occur. However, rapid
hotswaps are not recommended. Wait a few seconds for the Mode LED to turn
on (during initialization), and then turn off.
Notes Ensure the network cable is NOT connected when you install or remove an
SFP.
Caution Use only supported genuine HP SFPs with your switch. Non-HP SFPs are not
supported, and their use may result in product malfunction. Should you
require additional HP SFPs, contact your HP Networking Sales and Service
Office or authorized dealer.
Installing the SFPs:
Remove the protective plastic cover and retain it for later use. Hold the SFP
by its sides and gently insert it into any of the slots on the switch until the SFP
clicks into place.
WARNING The HP SFPs are Class 1 laser devices. Avoid direct eye exposure to
the beam coming from the transmit port.
2-15
Page 30
Installing the Switch
Installation Procedure
Removing the SFPs:
Note You should disconnect the network cable from the SFP before
removing it from the switch.
Depending on when you purchased your HP SFP, it may have either of three
different release mechanisms: a plastic tab on the bottom of the SFP, a plastic
collar around the SFP, or a wire bail.
To remove the SFPs that have the plastic tab or plastic collar, push the tab or
collar toward the switch until you see the SFP release from the switch (you
can see it move outward slightly), and then pull it from the slot.
To remove the SFPs that have the wire bail, lower the bail until it is
approximately horizontal, and then using the bail, pull the SFP from the slot.
Replace the protective plastic cover on the SFP.
Connecting Cables to SFPs
If you have any SFPs installed in the switch, the type of network connections
you will need to use depends on the type of SFPs you have installed. See the
table on page 1-4, and appendix A, “Specifications”, for the SFP cabling
information.
2-16
For SFP ports, and in general for all the switch ports, when a network cable
from an active network device is connected to the port, the port Link LED for
that port should go on. If the port Link LED does not go on when the network
cable is connected to the port, see “Diagnosing with the LEDs” in chapter 4,
“Troubleshooting”.
Page 31
Configuring the Switch
Initial Configuration
The HP 1820 Switch Series can be managed through a Web-browser interface
that you can access from any PC or workstation connected to the switch.
To access the Web interface, you must have the switch’s Internet Protocol (IP)
address. In the factory default configuration, the IP address is automatically
acquired from a Dynamic Host Configuration Protocol (DHCP) service that is
available on your network or from your Internet Service Provider (ISP). Most
routers provide this service. The DHCP service automatically provides a
network IP address configuration to devices that request it, such as the
HP 1820 switches.
Many features are configurable on the HP 1820 Switch Series. HP recommends
that at minimum, you configure a management password for switch security.
Follow these procedures to access the switch’s Web interface to perform the
switch configuration:
3
1. Place the switch close to the PC that you will use for configuration. It
helps if you can see the front panel of the switch while working from your
PC.
2. Connect power to the switch, and then start your PC (if it is not already
running) and wait until the switch and PC have finished their start-up
sequences.
3. Connect the PC to any port on the switch using a standard Ethernet LAN
cable. Verify that there is a link between the switch and PC by checking
the LEDs for the network port that you are using. (For more information
on LEDs, see “LEDs” on page 1-5.)
4. If the switch has access to a DHCP service, it automatically acquires an
IP address. Determine the IP address of the switch by examining the client
IP address table on your router (see the router documentation for how to
get this information), or talk to your ISP representative to get the IP
address of the switch.
3-1
Page 32
Configuring the Switch
Initial Configuration
If a DHCP service is not available in your network, or for some reason the
switch does not acquire an IP address from the service, the switch defaults
to IP address 192.168.1.1 after 120 seconds of automatically attempting
to acquire an IP address.
Note Alternatively, if you cannot determine the switch’s IP address, you can
force it to use the 192.168.1.1 address by first disconnecting the switch
from any router or internet connection and then unplugging and reconnecting power to it.
To communicate with the switch using the 192.168.1.1 address, see the
section “Using the 192.168.1.1 IP Address” on page 3-3 before continuing
these steps.
5. From the PC connected to the switch, open a Web-browser session and
enter the switch’s IP address as the URL. This opens the login screen for
the switch’s Web browser interface from which you perform the next
steps.
6. Enter the default username “admin” and click Login to start a switch Webbrowser interface session. By default, there is no password.
7. To configure a password on the switch Web interface, click Maintenance
> Password Manager and enter the Current Password. Define a New
Password and reenter it in the Confirm New Password field. Passwords
can be up to 64 alphanumeric and special characters in length, and are
case sensitive.
8. Click Apply to implement the new password, and then click Save Config-
uration at the top of the browser configuration screen to save your
settings and retain them when the switch is rebooted.
See the HP 1820 Switch Series Management and Configuration Guide for
more switch configuration information.
Note If you cannot remember the switch’s IP address or password, you can restore
the factory default settings by following the procedure described in the
“Troubleshooting” section.
3-2
Page 33
Using the 192.168.1.1 IP Address
Configuring the Switch
Using the 192.168.1.1 IP Address
If the switch does not acquire an IP address via the DHCP request, it defaults
to the following configuration:
Parameter Factory Default Setting
Password <blank>
IP address 192.168.1.1
Subnet mask 255.255.255.0
Default gateway not set
To communicate with the switch using the 192.168.1.1 address:
1. Connect a PC directly to any of the switch’s network ports using a
standard Ethernet cable.
2. Configure the PC’s IP Address and Subnet Mask to allow it to
communicate with the switch through your PC’s Web browser.
For example, for Windows 7, follow these steps:
a. Click Start, and then click Control Panel. In the Control Panel, click
Network and Internet and then Network and Sharing Center.
b. Click Local Area Connection, and then click Properties. If you are
prompted for an administrator password or for a confirmation, type
the password or provide confirmation.
c. Click Internet Protocol Version 4 (TCP/IPv4) and then click
Properties.
Note Record your PC’s current IP settings to be able to restore them later, if
needed.
3. Click Use the following IP address, and then, in the IP address and
Subnet mask fields, type the IP address settings:
a. For IP address, enter an IP address in the same range as the switch’s
IP address, for example, enter 192.168.1.12.
b. For Subnet mask, enter 255.255.255.0, then click OK.
c. Click Close (or OK) to close the Local Area Connection
Properties screen.
3-3
Page 34
Configuring the Switch
Where to Go From Here
4. Open the Web browser on the PC, and enter the switch address,
http://192.168.1.1 to access the switch’s Web interface. Go back to step
6 on the page 3-2 to configure the switch.
Where to Go From Here
For more information on the Web browser interface and all the features that
can be configured on the HP 1820 Switch Series, see the HP 1820 Switch
Series Management and Configuration Guide, which is available on the HP
Web site,
http://www.hp.com/support/manuals.
3-4
Page 35
Troubleshooting
This section describes how to troubleshoot the switch. For more information,
see the chapter “Troubleshooting” in the HP 1820 Switch Series Management
and Configuration Guide, available on the HP Web site,
http://www.hp.com/support/manuals.
This chapter describes the following:
■ basic troubleshooting tips (page 4-1)
■ diagnosing with the LEDs (page 4-2)
■ forgotten IP address or password (page 4-5)
■ testing the switch by resetting it (page 4-6)
■ HP Customer Support Services (page 4-6)
4
Basic Troubleshooting Tips
Common problems and their solutions are listed in the following table.
Problem Resolution
Switch fails Power-On Self
Test (POST)
Link light does not light when
a cable is connected.
Troubleshoot using the LEDs. See “Diagnosing with the
LEDs” on page 4-2
Look for loose or obviously faulty connections. If they
appear to be OK, make sure the connections are snug. If
that does not correct the problem, try a different cable.
4-1
Page 36
Troubleshooting
Diagnosing with the LEDs
Diagnosing with the LEDs
The first section shows LED patterns on the switch that indicate problem
conditions for general switch operation troubleshooting.
The second section shows LED patterns that indicate problem conditions for
PoE troubleshooting.
LED patterns for General Switch Troubleshooting
1. Check in the table below for the LED pattern you see on your switch.
2. Refer to the corresponding diagnostic tip on the next few pages.
LED Pattern Indicating Problems
Power Fault Port LED
Off with power cord
plugged in
On Prolonged On *
On Blinking
On Off Off with cable
* This LED is not important for the diagnosis.
†
The blinking behavior is an on/off cycle once every 1.6 seconds, approximately.
**
†
connected
Blinking
†
Diagnostic
Tips
➊
➋
➌
➍
4-2
Page 37
Diagnostic Tips:
Tip Problem Solution
Diagnosing with the LEDs
Troubleshooting
The switch is not
➊
plugged into an active
AC power source, the
switch’s power
adapter may have
failed, or Port 1 is not
receiving power from
a PoE power sourcing
equipment (PSE).
A switch hardware
➋
failure has occurred.
All the LEDs will stay
on indefinitely.
The network port for
➌
which the Link LED is
blinking has
experienced a self test
or initialization failure.
1. Verify the power cord is plugged into an active power source and to the switch.
Make sure these connections are snug.
2. Verify the PoE PSE is supplying sufficient power from a port that has an appropriate PoE priority.
3. Try power cycling the switch by unplugging and plugging the power cord back in.
4. If the Power LED is still not on, verify that the AC power source works by plugging
another device into the outlet. Or try plugging the switch into a different outlet
or try a different power cord.
If the power source and power cord are OK and this condition persists, the switch
power supply may have failed. Call your HP-authorized network reseller, or use the
electronic support services from HP to get assistance.
Try power cycling the switch. If the fault indication reoccurs, the switch may have
failed. Call your HP-authorized network reseller, or use the electronic support
services from HP to get assistance.
Try power cycling the switch. If the fault indication reoccurs, the switch port may
have failed. To confirm, try a different port that appears to be good. Call your HPauthorized network reseller, or use the electronic support services from HP to get
assistance.
If the port is an SFP, verify that it is one of the SFPs supported by the switch.
Unsupported SFPs will be identified with this fault condition. The supported SFPs
are listed in Chapter 1, “Switch Overview” on page 1-4. The SFPs are also tested
when they are “hot-swapped”— installed or changed while the switch is powered
on.
To verify that the port has failed, try removing and reinstalling the SFP without having
to power off the switch. If the port fault indication reoccurs, you will have to replace
the SFP.
The network
➍
connection is not
working properly.
Try the following procedures:
• For the indicated port, verify that both ends of the cabling, at the switch and the
connected device, are secure.
• Verify the connected device and switch are both powered
correctly.
• Verify that the connected devices comply with the appropriate IEEE 802.3 standard, including transmission of the Link signal.
• If the other procedures do not resolve the problem, try using a different port or
a different cable.
on
and operating
4-3
Page 38
Troubleshooting
Diagnosing with the LEDs
LED Patterns for PoE Troubleshooting
Press the LED Mode button to put the switch into PoE mode and the port
Mode LEDs will show which ports are experiencing the problem. The
following tables identify the specific problems that are shown by the LEDs.
1. Check in the table for the LED pattern you see on your switch.
2. Refer to the corresponding diagnostic tip.
Table 1-1. LED Error Indicators
LED Pattern Indicating Problems
Fault Port Link Port Mode
Off Fast Blinking
Green
Fast Blinking Fast Blinking
Green
Fast Blinking
Fast Blinking
(PoE)
Green
Green
Diagnostic
Tip s
➊
➋
Diagnostic Tips:
Tip Problem Solution
PoE oversubscription
➊
condition. All available
PoE power is already
taken by higher-priority
ports.
PoE hardware fault. A
➋
switch hardware
component that is
involved with PoE power
delivery has failed.
If possible add additional PoE power, or redefine port
priorities.
The switch must be replaced.
4-4
Page 39
Testing the Switch by Resetting It
Troubleshooting
Testing the Switch by Resetting It
If you believe the switch is not operating correctly, you can reset the switch
to test its circuitry and operating code. To reset the switch, unplug and plug
in the power cord (power cycling).
Power cycling the switch will cause the switch to perform its power-on self
test. Resetting the switch can also be invoked from the Web interface.
Restoring to Factory Defaults
If you forget the switch IP address or password, you can restore the factory
default configuration by pressing the Reset button.
To execute the factory default reset on the switch, perform these steps:
1. Using a small, thin tool with blunt ends (such as a paper clip), press the
Reset button on the front of the switch.
2. Continue to press the Reset button for more than 5 seconds.
3. Release the Reset button.
The switch will then complete its self test and begin operating with its
configuration restored to the factory default settings.
After completing this procedure, there will be no password, the IP address
will be returned to the default 192.168.1.1, and all configuration settings will
be returned to factory defaults.
4-5
Page 40
Troubleshooting
HP Customer Support Services
HP Customer Support Services
If you are still having trouble with your switch, Hewlett-Packard offers support
24 hours a day, seven days a week through the use of a number of automated
electronic services.
The HP Web site,
http://www.hp.com/networking/support also provides up-to-
date support information.
Additionally, your HP authorized network reseller can provide you with
assistance, both with services they offer and with services offered by HP.
Before Calling Support
Before calling your networking dealer or HP Support, to make the support
process most efficient, you first should have retrieved the following
information:
Information Item Information Location
• product identification, including SFPs the front of the switch, and on labels on the
SFPs
• details about the switch’s status includ-
ing the operating software (OS) version, a copy of the switch configuration,
and contents of the Support file
• copy of your network topology map, in-
cluding network addresses assigned to
the relevant devices
Web interface.
For more information on using the Web
interface, see the Management and
Configuration Guide for your switch.
your network records
4-6
Page 41
Specifications
Switch Specifications
Physical
Width Depth Height Weight
1820-8G (J9979A) 25.4 cm (10.0 in) 15.95 cm (6.28 in) 4.4 cm (1.73 in) 0.8 kg (1.8 lb)
1820-24G (J9980A) 44.25 cm (17.42 in) 24.61 cm (9.69 in) 4.4 cm (1.73 in) 2.7 kg (6.0 lb)
1820-48G (J9981A) 44.25 cm (17.42 in) 24.61 cm (9.69 in) 4.4 cm (1.73 in) 3.3 kg (7.3 lb)
1820-8G-PoE+ (J9982A) 25.40 cm (10.0 in) 15.95 cm (6.28 in) 4.4 cm (1.73 in) 0.9 kg (2.0 lb)
1820-24G-PoE+ (J9983A) 44.25 cm (17.42 in) 24.61 cm (9.69 in) 4.4 cm (1.73 in) 3.3 kg (7.3 lb)
1820-48G-PoE+ (J9984A) 44.25 cm (17.42 in) 32.26 cm (12.7 in) 4.4 cm (1.73 in) 4.4 kg (9.7 lb)
A
Electrical
AC voltage Maximum current Frequency range
1820-8G (J9979A)
1820-24G (J9980A)
1820-48G (J9981A)
1820-8G-PoE+ (J9982A)
1820-24G-PoE+ (J9983A)
1820-48G-PoE+ (J9984A)
1
Requires a connection to an external power adapter. The adapter automati-
1,3
2
2
1
2
2
cally adjusts to any voltage between 100 and 240 volts and either 50 or 60 Hz.
100-240 volts 0.2 A 50/60 Hz
100-127 volts
200-240 volts
100-127 volts
200-240 volts
100-240 volts 0.9 A 50/60 Hz
100-127 volts
200-240 volts
100-127 volts
200-240 volts
0.5 A / 0.3 A 50/60 Hz
0.7 A / 0.4 A 50/60 Hz
2.6 A / 1.3 A 50/60 Hz
5 A / 2.5 A 50/60 Hz
A-1
Page 42
Specifications
Switch Specifications
2
The switch automatically adjusts to any voltage between 100-127 or 200-240
volts and either 50 or 60 Hz.
3
The switch can also be powered by a PoE PD connection to Port 1. Port 1 is
an IEEE 802.3af Compatible PD (PoE Powered Device) - Class 3.
Environmental
Operating Non-Operating
Temperature 0°C to 40°C (32°F to 104°F) -40°C to 70°C (-40°F to 158°F)
Relative humidity
(non-condensing)
Maximum altitude 3.0 Km (10,000 ft)* 4.57 Km (15,000 ft)
15% to 95% at 40°C (104°F) 15% to 95% at 65°C (149°F)
* The operating maximum altitude should not exceed that of any accessory being connected
to any 1820 Switch.
Acoustics
Noise Emmission
1820-24G-PoE+
(J9983A)
1820-48G-PoE+
(J9984A)
Geraeuschemission LpA=37.9 dB am fiktiven Arbeitsplatz nach DIN 45635 T.19
Noise Emission LpA=37.9 dB at virtual workspace according to DIN 45635 T.19
Geraeuschemission LpA=45 dB am fiktiven Arbeitsplatz nach DIN 45635 T.19
Noise Emission LpA=45 dB at virtual workspace according to DIN 45635 T.19
1820-8G, 1820-24G, 1820-48G, and 1820-8G-PoE+ Switches:
Power: 0 dB (no fans)
Safety
Complies with:
■ EN60950-1:2006+A11:2009+A1:2010+A12:2011 / IEC60950-1:2005;
Am1:2009;
■ CSA22.2 No. 60950-1-07 2nd; UL60950-1 2nd
■ EN 60825-1:2007 / IEC 60825-1:2007 Class 1
A-2
Page 43
Standards
Specifications
Standards
Laser safety information
Technology Compatible with these
10-T
100-TX
1000-T
100-FX
1000-SX
1000-LX
IEEE standards
IEEE 802.3 10BASE-T
IEEE 802.3u 100BASE-TX
IEEE 802.3ab 1000BASE-T
IEEE 802.3u 100BASE-FX EN/IEC 60825 Class 1 Laser Product
IEEE 802.3z 1000BASE-SX EN/IEC 60825 Class 1 Laser Product
IEEE 802.3z 1000BASE-LX EN/IEC 60825 Class 1 Laser Product
EN/IEC standard
compliance
SFP Lasers
Laser Klasse 1
Laser Klasse 1
Laser Klasse 1
A-3
Page 44
Specifications
Cabling and Technology Information Specifications
Cabling and Technology Information
Specifications
10 Mbps Operation Category 3, 4 or 5, 100-ohm unshielded twisted-pair (UTP) or
Twisted-pair copper
Multimode fiber
Single mode fiber
1
A mode conditioning patch cord may be needed for some Gigabit-LX installations.
See “Mode Conditioning Patch Cord” on page A-5 for more information.
100 Mbps Operation Category 5, 100-ohm UTP or STP cable, complying with IEEE
1000 Mbps Operation Category 5, 100-ohm 4-pair UTP or STP cable, complying with
shielded twisted-pair (STP) cable, complying with IEEE 802.3
10BASE-T specifications.
802.3u 100BASE-TX specifications.
IEEE 802.3ab 1000BASE-T specifications—Category 5e or
better is recommended. See note on 1000BASE-T Cable
Requirements below.
62.5/125 μm or 50/125 μm (core/cladding) diameter, low metal
content, graded index fiber-optic cables, complying with the
ITU-T G.651 and ISO/IEC 793-2 Type A1b or A1a standards
respectively.
9/125 μm (core/cladding) diameter, low metal content fiberoptic cables, complying with the ITU-T G.652 and
ISO/IEC 793-2 Type B1 standards.
1
Note on 1000BASE-T Cable Requirements. The Category 5 networking
cables that work for 100BASE-TX connections should also work for
1000BASE-T, as long as all four-pairs are connected. But, for the most robust
connections, you should use cabling that complies with the Category 5e
specifications, as described in Addendum 5 to the TIA-568-A standard (ANSI/
TIA/EIA-568-A-5).
A-4
Because of the increased speed provided by 1000BASE-T (Gigabit-T), network
cable quality is more important than for either 10BASE-T or 100BASE-TX.
Cabling plants being used to carry 1000BASE-T networking must comply with
the IEEE 802.3ab standards. In particular, the cabling must pass tests for
Attenuation, Near-End Crosstalk (NEXT), and Far-End Crosstalk (FEXT).
Additionally, unlike the cables for 100BASE-TX, the 1000BASE-T cables must
pass tests for Equal-Level Far-End Crosstalk (ELFEXT) and Return Loss.
When testing your cabling, be sure to include the patch cables that connect
the switch and other end devices to the patch panels on your site. The patch
cables are frequently overlooked when testing cable and they must also
comply with the cabling standards.
Page 45
Technology Distance Specifications
Mode Conditioning Patch Cord
Specifications
Technology Supported cable type Multimode fiber
100-FX multimode fiber any up to 2,000 meters
1000-T twisted-pair copper N/A up to 100 meters
1000-SX multimode fiber 160 MHz*km
1000-LX multimode fiber
single mode fiber
modal bandwidth
200 MHz*km
400 MHz*km
500 MHz*km
400 MHz*km
500 MHz*km
N/A
Supported distances
2 - 220 meters
2 - 275 meters
2 - 500 meters
2 - 550 meters
2 - 550 meters
2 - 550 meters
2 - 10,000 meters
Mode Conditioning Patch Cord
The following information applies to installations in which multimode fiberoptic cables are connected to a Gigabit-LX port. Multimode cable has a design
characteristic called “Differential Mode Delay”, which requires the
transmission signals be “conditioned” to compensate for the cable design and
thus prevent resulting transmission errors.
Under certain circumstances, depending on the cable used and the lengths of
the cable runs, an external Mode Conditioning Patch Cord may need to be
installed between the Gigabit-LX transmitting device and the multimode
network cable to provide the transmission conditioning. If you experience a
high number of transmission errors on those ports, usually CRC or FCS errors,
you may need to install one of these patch cords between the fiber-optic port
in your switch and your multimode fiber-optic network cabling, at both ends
of the network link.
The patch cord consists of a short length of single mode fiber cable coupled
to graded-index multimode fiber cable on the transmit side, and only
multimode cable on the receive side. The section of single mode fiber is
connected in such a way that it minimizes the effects of the differential mode
delay in the multimode cable.
A-5
Page 46
Specifications
Tx
Rx
To net work
multimode
cabling
Mode Conditioning
Patch Cord
The multimode cable in the patch cord
must match the characteristics of your
network cable
Gigabit-LX port
Single mode section plugs into Tx
port on Gigabit-LX Transceiver or
Gigabit-LX mini-GBIC
Mode Conditioning Patch Cord
Note Most of the time, if you are using good quality graded-index multimode fiber
cable that adheres to the standards listed in this appendix, there should not
be a need to use mode conditioning patch cords in your network. This is
especially true if the fiber runs in your network are relatively short.
Installing the Patch Cord
As shown in the illustration below, connect the patch cord to the transceiver
with the section of single mode fiber plugged in to the Tx (transmit) port. Then,
connect the other end of the patch cord to your network cabling patch panel,
or directly to the network multimode fiber.
If you connect the patch cord directly to the network cabling, you may need
to install a female-to-female adapter to allow the cables to be connected
together.
Example: Connecting a Mode Conditioning Patch Cord for Gigabit-LX
Make sure you purchase a patch cord that has appropriate connectors on each
end, and has multimode fibers that match the characteristics of the multimode
fiber in your network. Most important, the core diameter of the multimode
patch cord must match the core diameter of the multimode cable
infrastructure (either 50 or 62.5 microns).
A-6
Page 47
Twisted-Pair Cable/Connector Pin-Outs
Specifications
Twisted-Pair Cable/Connector Pin-Outs
The Auto-MDIX Feature: In the default configuration, “Auto”, the fixed 10/
100/1000BASE-T ports on the switches all automatically detect the type of port
on the connected device and operate as either an MDI or MDI-X port,
whichever is appropriate. So for any connection, a straight-through twistedpair cable can be used—you no longer have to use crossover cables, although
crossover cables can also be used for any of the connections. (The 10/100/
1000-T ports support the IEEE 802.3ab standard, which includes the “AutoMDIX” feature.)
If you connect a switch twisted-pair port to another switch or hub, which
typically have MDI-X ports, the switch port automatically operates as an MDI
port. If you connect it to an end node, such as a server or PC, which typically
have MDI ports, the switch port operates as an MDI-X port. In all cases, you
can use standard straight-through cables or crossover cables.
If you happen to use a correctly wired crossover cable, though, the switch will
still be able to automatically detect the MDI/MDI-X operation and link
correctly to the connected device.
Note Using Fixed Configurations. If the port configuration is changed to any of
the fixed configurations though, for example 100 Mbps/full duplex, the port
operates as MDI-X only and the correct cable type must be used: for
connections to MDI ports, such as end nodes, use a straight-through cable; for
connections to MDI-X ports, such as on hubs and other switches, use a
crossover cable.
Other Wiring Rules:
■ All twisted-pair wires used for 10 Mbps, and 100 Mbps operation must be
twisted through the entire length of the cable. The wiring sequence must
conform to EIA/TIA 568-B (not USOC). See “Twisted-Pair Cable Pin
Assignments” later in this appendix for a listing of the signals used on each
pin.
■ For 1000BASE-T connections, all four pairs of wires in the cable must be
available for data transmission.
■ For 10 Mbps connections to the ports, you can use Category 3, 4, or 5
unshielded twisted-pair cable, as supported by the IEEE 802.3 Type
10BASE-T standard.
A-7
Page 48
Specifications
Twisted-Pair Cable/Connector Pin-Outs
■ For 100 Mbps connections to the ports, use 100-ohm Category 5 UTP or
STP cable only, as supported by the IEEE 802.3u Type 100BASE-TX
standard.
■ For 1000 Mbps connections, 100-ohm Category 5e or better cabling is
recommended.
A-8
Page 49
Twisted-Pair Cable/Connector Pin-Outs
Specifications
Straight-through Twisted-Pair Cable for 10 Mbps or 100 Mbps Network Connections
Because of the Auto-MDIX operation of the 10/100 ports on the switch, for all
network connections, to PCs, servers or other end nodes, or to hubs or other
switches, you can use straight-through cables.
If any of these ports are given a fixed configuration, for example 100 Mbps/
Full Duplex, the ports operate as MDI-X ports, and straight-through cables
must be then used for connections to PC NICs and other MDI ports.
Cable Diagram
Note Pins 1 and 2 on connector “A” must be wired as a twisted pair to pins 1 and 2
on connector “B”.
Pins 3 and 6 on connector “A” must be wired as a twisted pair to pins 3 and 6
on connector “B”.
Pins 4, 5, 7, and 8 are not used in this application, although they may be wired
in the cable.
.
Pin Assignments
Switch End (MDI-X) Computer, Transceiver, or
Other End
Signal Pins Pins Signal
receive +
receive transmit +
transmit -
1
2
3
6
1
2
3
6
transmit +
transmit receive +
receive -
A-9
Page 50
Specifications
Twisted-Pair Cable/Connector Pin-Outs
Crossover Twisted-Pair Cable for 10 Mbps or 100 Mbps Network Connection
The Auto-MDIX operation of the 10/100 ports on the switch also allows you to
use crossover cables for all network connections, to PCs, servers or other end
nodes, or to hubs or other switches.
If any of these ports are given a fixed configuration, for example 100 Mbps/
Full Duplex, the ports operate as MDI-X ports, and crossover cables must be
then used for connections to hubs or switches or other MDI-X network
devices.
Cable Diagram
Note Pins 1 and 2 on connector “A” must be wired as a twisted pair to pins 3 and 6
on connector “B”.
Pins 3 and 6 on connector “A” must be wired as a twisted pair to pins 1 and 2
on connector “B”.
Pins 4, 5, 7, and 8 are not used in this application, although they may be wired
in the cable.
Pin Assignments
A-10
Switch End (MDI-X) Hub or Switch Port, or Other
Signal Pins Pins Signal
receive +
receive transmit +
transmit -
1
2
3
6
MDI-X Port End
6
3
2
1
transmit transmit +
receive receive +
Page 51
Twisted-Pair Cable/Connector Pin-Outs
Specifications
Straight-Through Twisted-Pair Cable for 1000 Mbps Network Connections
1000BASE-T connections require that all four pairs of wires be connected.
Cable Diagram
Note Pins 1 and 2 on connector “A” must be wired as a twisted pair to pins 1 and 2
on connector “B”.
Pins 3 and 6 on connector “A” must be wired as a twisted pair to pins 3 and 6
on connector “B”.
Pins 4 and 5 on connector “A” must be wired as a twisted pair to pins 4 and 5
on connector “B”.
Pins 7 and 8 on connector “A” must be wired as a twisted pair to pins 7 and 8
on connector “B”.
.
Pin Assignments
For 1000BASE-T operation, all four pairs of wires are used for both transmit
and receive.
A-11
Page 52
Specifications
Twisted-Pair Cable/Connector Pin-Outs
A-12
Page 53
EMC Regulatory Statements
Regulatory Statements
U.S.A.
FCC Class A
This equipment has been tested and found to comply with the limits for a Class
A digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference when
the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user
will be required to correct the interference at his own expense.
B
You are cautioned that changes or modifications not expressly approved by
the party responsible for compliance could void your authority to operate the
equipment.
Canada
This product complies with Class A Canadian EMC requirements.
Australia/New Zealand
This product complies with Australia/New Zealand EMC Class A
requirements.
B-1
Page 54
EMC Regulatory Statements
Regulatory Statements
Japan
VCCI Class A
Korea
B-2
Taiwan
Page 55
Index
Numerics
10/100BASE-TX ports
location on switch … 1-2
1000Base-T
1000Base-T
fiber-optic cable specifications … A-5
A
acoustic specifications … A-2
auto MDI/MDI-X operation … A-9, A-11
HP Auto-MDIX feature … A-7
B
back of switch
power connector … 1-6
basic troubleshooting tips … 4-1
blinking LEDs
error indications … 4-2, 4-5
buttons
Reset button … 1-6
C
cabinet
mounting the switch in … 2-9, 2-11
cables
connecting cables to switch ports … 2-14– 2-15
infrastructure requirements … 2-6
cables, twisted pair
category 3, 4, 5 … A-7
cross-over cable pin-out … A-10
MDI-X to MDI connections … A-9, A-11
MDI-X to MDI-X connections … A-10
pin-outs … A-9, A-11
straight-through cable pin-out … A-9, A-11
switch-to-computer connection … A-9, A-11
switch-to-switch or hub connection … A-10
cables, twisted-pair
HP Auto-MDIX feature … A-7
wiring rules … A-7
cables, twisted-pair connector pin-outs … A-7
cabling infrastructure … 2-6
Clear button
location on switch … 1-2
restoring factory default configuration … 1-6,
4-5
configuration
restoring factory defaults … 1-6
connecting the switch to a power source … 2-13
console port
location on switch … 1-2
cross-over cable
pin-out … A-10
D
description
front of switch … 1-2
LEDs … 1-5
switch … 1-1
E
electrical specifications, switch … A-1–A-2
environmental specifications, switch … A-2
F
factory default configuration, restoring … 1-6
Fault LED
location on switch … 1-2
showing error conditions … 4-2
fiber-optic cables
1000Base-T … A-5
front of switch … 1-2
10/100BASE-TX ports … 1-2
description … 1-2
network ports … 1-4
Reset button … 1-6
H
horizontal surface
mounting switch on … 2-12
HP Auto-MDIX
feature description … A-7
Index-1
Page 56
I
included parts … 2-1
installation
connecting the switch to a power source … 2-13
horizontal surface mounting … 2-12
location considerations … 2-6
network cable requirements … 2-6
precautions … 2-4
rack or cabinet mounting … 2-9, 2-11
site preparation … 2-6
L
LEDs
behavior during self test … 2-8
descriptions of … 1-5
error indications … 4-2, 4-5
Fault
showing error conditions … 4-2
location on switch … 1-2
Power … 1-5
behavior during self test … 2-9
location for the switch, considerations … 2-6
M
MDI-X to MDI network cable … A-9, A-11
MDI-X to MDI-X network cable … A-10
mounting the switch
in a rack or cabinet … 2-9, 2-11
precautions … 2-4
on a horizontal surface … 2-12
N
network cables
HP Auto-MDIX feature … A-7
required types … 2-6
twisted-pair connector pin-outs … A-7
twisted-pair, wiring rules … A-7
network devices
connecting to the switch … 2-14– 2-15
network ports
connecting to … 2-14–2-15
location on switch … 1-4
types of … 1-4
P
parts, included with the switch … 2-1
physical specifications, switch … A-1
pin-outs
twisted-pair cables … A-7
PoE LED patterns … 4-4
PoE troubleshooting … 4-4
port LEDs
normal operation … 2-9
ports
10/100BASE-TX, location on switch … 1-2–1-3
10/100Base-TX, location on switch … 1-2– 1-3
connecting to … 2-14– 2-15
HP Auto-MDIX feature … A-7
network connections … 2-14–2-15
power connector … 1-6
Power LED … 1-5
behavior during self test … 2-9
behaviors … 1-5
location on switch … 1-2
power source
connecting the switch to … 2-13
Power-over-Ethernet
PoE power … 1-4
precautions
mounting the switch … 2-4
power requirements … 2-4
preparing the installation site … 2-6
R
rack
mounting precautions … 2-4
mounting the switch in … 2-9, 2-11
Reset button
description … 1-6
location on switch … 1-2, 1-6
restoring factory default configuration … 4-5
resetting the switch
location of Reset button … 1-6
S
safety and regulatory statements … B-1
safety specifications … A-2
self test
LED behavior during … 2-8
Power LED behavior … 2-9
Index-2
Page 57
SFPs
slot, location on switch … 1-2
slots for SFPs
location on switch … 1-2
specifications
acoustic … A-2
electrical … A-1–A-2
environmental … A-2
physical … A-1
safety … A-2
straight-through cable
pin-out … A-9, A-11
switch
connecting to a power source … 2-13
description … 1-1
electrical specifications … A-1– A-2
environmental specifications … A-2
front panel description … 1-2
included parts … 2-1
mounting in a rack or cabinet … 2-9, 2-11
mounting on horizontal surface … 2-12
physical specifications … A-1
switch operation
verifying after installation … 2-6
T
tips for troubleshooting … 4-1
troubleshooting … 4-1
basic tips … 4-1
common network problems … 4-1
twisted-pair cable
cross-over cable pin-out … A-10
pin-outs … A-7, A-9, A-11
straight-through cable pin-out … A-9, A-11
switch-to-computer connection … A-9, A-11
switch-to-switch or hub connection … A-10
twisted-pair ports
HP Auto-MDIX feature … A-7
W
wiring rules for twisted-pair cables … A-7
Index-3
Page 58
Index-4
Page 59
5400zl Switches
Technology for better business outcomes
To learn more, visit www.hp.com/networking
© Copyright 2015 Hewlett-Packard Development Company, L.P.
The information contained herein is subject to change without notice. The only
warranties for HP products and services are set forth in the express warranty
statements accompanying such products and services. Nothing herein should
be construed as constituting an additional warranty. HP will not be liable for
technical or editorial errors or omissions contained herein.
February 2015
Manual Part Number
5998-5835
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