HP V1910 User manual

HP V1910 Switch Series
Getting Started Guide
59982236
Part number: 5998-2236
Document version: 6W100-20110615

Legal and notice information
© Copyright 2011 Hewlett-Packard Development Company, L.P.
No part of this documentation may be reproduced or transmitted in any form or by any means without
prior written consent of Hewlett-Packard Development Company, L.P.
The information contained herein is subject to change without notice.
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.

Preface
The HP V1910 Switch Series Getting Started Guide describes the appearance, installation, power-on,
maintenance, and troubleshooting of the HP V1910 switches.
This preface includes:
Audience
Conventions
Contacting HP
Subscription service
Warranty
Documents
Audience
This documentation set is intended for:
Network planners
Field technical support and servicing engineers
Network administrators working with the HP V1910 switches
Conventions
This section describes the conventions used in this documentation.
GUI conventions
Convention Descri
p
tion
Boldface Window names, button names, field names, and menu items are in Boldface. For
example, the New User window appears; click OK.
> Multi-level menus are separated by angle brackets. For example, File > Create > Folder.
Symbols
Convention Descri
p
tion
WARNING An alert that calls attention to important information that if not understood or followed can
result in personal injury.
CAUTION An alert that calls attention to important information that if not understood or followed can
result in data loss, data corruption, or damage to hardware or software.
IMPORTANT An alert that calls attention to essential information.
NOTE An alert that contains additional or supplementary information.
TIP An alert that provides helpful information.

Network topology icons
Represents a generic network device, such as a router, switch, or firewall.
Represents a routing-capable device, such as a router or Layer 3 switch.
Represents a generic switch, such as a Layer 2 or Layer 3 switch, or a router that supports
Layer 2 forwarding and other Layer 2 features.
Port numbering in examples
The port numbers in this document are for illustration only and might be unavailable on your device.
Contacting HP
For worldwide technical support information, see the HP support website:
http://www.hp.com/support
Before contacting HP, collect the following information:
Product model names and numbers
Technical support registration number (if applicable)
Product serial numbers
Error messages
Operating system type and revision level
Detailed questions
Subscription service
HP recommends that you register your product at the Subscriber's Choice for Business website:
http://www.hp.com/go/e-updates
After registering, you will receive e-mail notification of product enhancements, new driver versions,
firmware updates, and other product resources.
Warranty
The Hewlett-Packard Limited Warranty Statement for this product and the HP Software License Terms
which apply to any software accompanying this product are available on the HP networking Web site
at www.hp.com/networking/warranty.The customer warranty support and services information are
available on the HP networking Web site at www.hp.com/networking/support. Additionally, your
HP-authorized network reseller can provide you with assistance, both with services that they offer and
with services offered by HP.
Documents
To find related documents, browse to the Manuals page of the HP Business Support Center website:

http://www.hp.com/support/manuals

i
Contents
Product overview·························································································································································· 1
About the HP V1910 Switch Series ································································································································1
HP V1910-16G Switch JE005A······································································································································2
Front panel ································································································································································2
Rear panel·································································································································································3
Power supply system ················································································································································3
Cooling system ·························································································································································3
HP V1910-24G Switch JE006A······································································································································3
Front panel ································································································································································3
Rear panel·································································································································································3
Power supply system ················································································································································4
Cooling system ·························································································································································4
HP V1910-48G Switch JE009A······································································································································4
Front panel ································································································································································4
Rear panel·································································································································································4
Power supply system ················································································································································4
Cooling system ·························································································································································5
HP V1910-24G-PoE (170W) Switch JE008A················································································································5
Front panel ································································································································································5
Rear panel·································································································································································5
Power supply system ················································································································································5
Cooling system ·························································································································································5
HP V1910-24G-PoE (365W) Switch JE007A················································································································6
Front panel ································································································································································6
Rear panel·································································································································································6
Power supply system ················································································································································6
Cooling system ·························································································································································7
Ports ····················································································································································································7
Console port······························································································································································7
10/100/1000Base-T Ethernet port ·······················································································································7
1000Base-X SFP interface ·······································································································································7
LEDs ····················································································································································································9
Power LED ·································································································································································9
RPS status LED···························································································································································9
Port mode LED························································································································································ 10
10/100/1000Base-T auto-sensing Ethernet port status LED············································································ 10
1000Base-X SFP interface status LED ·················································································································· 11
Preparing for installation ···········································································································································12
Safety recommendations ··············································································································································· 12
Examining the installation site ······································································································································ 12
Temperature/humidity ·········································································································································· 12
Cleanness······························································································································································· 13
EMI·········································································································································································· 13
Laser safety····························································································································································· 13
Installation tools······························································································································································ 14
Installing the switch····················································································································································15
Installation flow ······························································································································································ 15
Installing the switch into a 19-inch rack ······················································································································ 16

ii
Introduction to mounting brackets························································································································ 16
Attaching the mounting brackets to the switch··································································································· 16
Mounting the switch to a rack······························································································································ 18
Mounting the switch on a workbench·························································································································· 20
Grounding the switch ···················································································································································· 20
Grounding the switch with a grounding strip····································································································· 21
Grounding the switch with a grounding conductor buried in the earth ground············································· 22
Grounding the switch in other grounding environments ··················································································· 23
Connecting the power cord ·········································································································································· 23
Connecting an AC power cord ··························································································································· 23
Connecting an RPS DC power cord···················································································································· 24
Verifying the installation················································································································································ 25
Powering on the switch for the first time···················································································································26
Setting up the configuration environment···················································································································· 26
Connecting the console cable ······································································································································ 26
Console cable························································································································································ 26
Connection procedure ·········································································································································· 27
Setting terminal parameters ·········································································································································· 27
Powering on the switch·················································································································································· 30
Checking before power-on··································································································································· 30
Powering on the switch········································································································································· 30
Changing the boot mode ····································································································································· 32
Maintenance and troubleshooting····························································································································35
Software loading failure················································································································································ 35
Password loss ································································································································································· 35
Console login password loss ······························································································································· 35
Boot ROM password loss ····································································································································· 35
Power supply failure ······················································································································································ 36
Configuration terminal problems·································································································································· 37

1
Product overview
About the HP V1910 Switch Series
HP V1910 Switch Series is a line of Layer 2 Gigabit Ethernet switching products developed by
Hewlett-Packard Development Company, L.P. (hereinafter referred to as HP). The V1910 switches are
intelligent manageable switches designed for network environments where high performance,
high-density port distribution, and easy installation are required.
With 10/100/1000 Mbps Ethernet interfaces, the V1910 switches are mainly deployed at the access
layer in enterprise networks requiring Gigabit to the Desktop (GTTD) application and at the distribution
layer in metropolitan-area networks (MANs). In the latter deployment, the V1910 Switch Series provides
GE electrical interfaces for user access or low-end switch convergence in the downlink direction. In the
uplink direction, they are aggregated to large-capacity Layer 3 switches or switches at the exchange
office through their GE interfaces.
Table 1 and Table 2 show the models and system specifications of the V1910 Switch Series.
Table 1 System specifications for non-PoE switches of the V1910 Switch Series
Item HP V1910-16G Switch
JE005A
HP V1910-24G Switch
JE006A
HP V1910-48G Switch
JE009A
Dimensions
(H × W × D)
43.6 × 440 × 160 mm (1.72
× 17.32 × 6.30 in)
43.6 × 440 × 160 mm (1.72
× 17.32 × 6.30 in)
43.6 × 440 × 260 mm (1.72
× 17.32 × 10.24 in)
Weight ≤3 kg (6.61 lb) ≤3 kg (6.61 lb) ≤5 kg (11.02 lb)
Console port 1
Service ports
16 × 10/100/1000Base-T
autosensing Ethernet ports +
4 GE SFP interfaces
24 × 10/100/1000Base-T
autosensing Ethernet ports +
4 GE SFP interfaces
48 × 10/100/1000Base-T
autosensing Ethernet ports +
4 GE SFP interfaces
Input voltage
(AC)
Rated voltage range: 100 VAC to 240 VAC, 50 Hz or 60 Hz
Maximum voltage range: 90 VAC to 264 VAC, 47 Hz or 63 Hz
Power
consumption 11.9 W 13.4 W 25.7 W
Power
consumption
(full
configuration)
25.1 W 31.5 W 59.8 W
Operating
temperature 0°C to 45°C (32°F to 113°F)
Operating
humidity
(noncondensi
ng)
10% to 90%

2
Table 2 System specifications for the V1910 PoE switches
Item HP V1910-24G-PoE (170W) Switch
JE008A
HP V1910-24G-PoE (365W) Switch
JE007A
Dimensions (H × W
× D)
43.6 × 440 × 420 mm (1.72 × 17.32 ×
16.54 in)
43.6 × 440 × 420 mm (1.72 × 17.32 ×
16.54 in)
Weight ≤7 kg (15.43 lb) ≤7 kg (15.43 lb)
Console port 1
Service ports 24 × 10/100/1000Base-T autosensing Ethernet ports + 4 GE SFP interfaces
Input
voltage
AC Rated voltage range: 100 VAC to 240 VAC, 50 Hz or 60 Hz
Maximum voltage range: 90 VAC to 264 VAC, 47 Hz or 63 Hz
RPS DC N/A
Use the external RPS unit provided by HP
only, with the rated voltage ranging from
–52 VDC to –55 VDC
Supported RPS unit N/A A-RPS1600
Power consumption 25.0 W AC: 45.6 W
DC: 27.5 W
Power consumption
(full configuration)
255 W (85 W for system power
consumption and 170 W for PoE power
consumption)
AC power input: 523 W (158 W for
system power consumption and 365 W
for PoE power consumption)
DC power input: 832 W (92 W for system
power consumption and 740 W for PoE
power consumption)
Operating
temperature 0°C to 45°C (32°F to 113°F)
Operating humidity
(noncondensing) 10% to 90%
HP V1910-16G Switch JE005A
Front panel
Figure 1 HP V1910-16G Switch JE005A front panel
(1) 10/100/1000Base-T auto-sensing Ethernet port (2) 1000Base-X SFP interface
(3) Console port (4) Port status LED
(5) Power LED (Power)

3
Rear panel
Figure 2 HP V1910-16G Switch JE005A rear panel
1 2
(1)
A
C receptacle (2) Groundin
g
screw
Power supply system
AC power input:
Rated voltage range: 100 VAC to 240 VAC, 50 Hz or 60 Hz
Input voltage range: 90 VAC to 264 VAC, 47 Hz or 63 Hz
Cooling system
The HP V1910-16G Switch JE005A is equipped with one fan for heat dissipation
HP V1910-24G Switch JE006A
Front panel
Figure 3 HP V1910-24G Switch JE006A front panel
(1) 10/100/1000Base-T auto-sensin
g
Ethernet port
(2) 1000Base-X SFP interface
(3) Console port (4) Port status LED
(5) Power LED (Power)
Rear panel
Figure 4 HP V1910-24G Switch JE006A rear panel
(1) AC receptacle (2) Grounding screw

4
Power supply system
AC power input:
Rated voltage range: 100 VAC to 240 VAC, 50 Hz or 60 Hz
Input voltage range: 90 VAC to 264 VAC, 47 Hz or 63 Hz
Cooling system
The HP V1910-24G Switch JE006A is equipped with one fan for heat dissipation.
HP V1910-48G Switch JE009A
Front panel
Figure 5 HP V1910-48G Switch JE009A front panel
456
1 2 3
(1) 10/100/1000Base-T auto-sensin
g
Ethernet port
(2) 10/100/1000Base-T auto-sensin
g
Ethernet port status LED
(3) Console port (4) Power LED (Power)
(5) 1000Base-X SFP interface (6) 1000Base-X SFP interface status LED
Rear panel
Figure 6 HP V1910-48G Switch JE009A rear panel
(1)
A
C receptacle (2) Groundin
g
screw
Power supply system
AC power input:
Rated voltage range: 100 VAC to 240 VAC, 50 Hz or 60 Hz
Input voltage range: 90 VAC to 264 VAC, 47 Hz or 63 Hz

5
Cooling system
The HP V1910-48G Switch JE009A is equipped with one fan for heat dissipation.
HP V1910-24G-PoE (170W) Switch JE008A
Front panel
Figure 7 HP V1910-24G-PoE (170W) Switch JE008A front panel
12 3
4
567
(1) 10/100/1000Base-T auto-sensin
g
Ethernet port
(2) Port status LED mode switchin
g
button
(3) Port status LED (4) Power LED (Power)
(5) Port mode LED (6) Console port
(7) 1000Base-X SFP interface
Rear panel
Figure 8 HP V1910-24G-PoE (170W) Switch JE008A rear panel
(1) AC receptacle (2) Grounding screw
Power supply system
AC power input:
Rated voltage range: 100 VAC to 240 VAC, 50 Hz or 60 Hz
Input voltage range: 90 VAC to 264 VAC, 47 Hz or 63 Hz
Cooling system
The HP V1910-24G-PoE (170W) Switch JE008A is equipped with three fans for heat dissipation.

6
HP V1910-24G-PoE (365W) Switch JE007A
Front panel
Figure 9 HP V1910-24G-PoE (365W) Switch JE007A front panel
(1) 10/100/1000Base-T auto-sensing Ethernet port (2) Port status LED mode switching button
(3) RPS status LED (RPS) (4) Port status LED
(5) Power LED (Power) (6) Port mode LED
(7) Console port (8) Port 1000Base-X SFP interface
Rear panel
Figure 10 HP V1910-24G-PoE (365W) Switch JE007A rear panel
1 2 3 4
(1) DC power receptacle (2) Screw hole of the plu
g
(3)
A
C receptacle (4) Groundin
g
screw
Power supply system
The HP V1910-24G-PoE (365W) Switch JE007A can adopt AC power input, or DC power input, or both
to provide backup
AC power input:
Rated voltage range: 100 VAC to 240 VAC, 50 Hz or 60 Hz
Input voltage range: 90 VAC to 264 VAC, 47 Hz or 63 Hz
DC power input
Rated voltage range: –52 VDC to –55 VDC
CAUTION:
Only the RPS recommended by HP can be used for the HP V1910-24G-PoE (365W) Switch JE007A. The
–48 VDC power supply in the equipment room cannot be used directly. Otherwise, the switch may be
damaged.

7
Cooling system
The HP V1910-24G-PoE (365W) Switch JE007A is equipped with six fans for heat dissipation.
Ports
Console port
Each V1910 switch provides one console port on the front panel.
Table 3 Console port specifications
Item S
p
ecification
Connector type RJ-45
Compliant standard EIA/TIA-232
Transmission baud rate 9600 bps to 115200 bps (38400 by default)
Service
Provides connection to an ASCII terminal.
Provides connection to a serial port of a local or remote (through a pair
of modems) PC running terminal emulation program.
10/100/1000Base-T Ethernet port
Each V1910 switch provides 10/100/1000Base-T Ethernet ports on its front panel. Quantity of Ethernet
ports varies with the device model. For more information, see Table 1.
Table 4 10/100/1000Base-T Ethernet port specifications for the V1910 Switch Series
Item S
p
ecification
Connector type RJ-45
Interface speed and operating
mode
10 Mbps, full duplex
100 Mbps, full duplex
1000 Mbps, full duplex
MDI/MDI-X, auto-sensing
Max transmission distance 100 m (328.1 ft)
Transmission medium Category-5 unshielded twisted pair cable
Standard IEEE 802.3i, IEEE 802.3u, IEEE 802.3ab
1000Base-X SFP interface
Each V1910 switch provides one or four 1000Base-X SFP interfaces on its front panel. You can select the
GE SFP transceiver modules described in Table 5.

8
Table 5 Transceiver modules supported by the 1000Base-X SFP interfaces on the V1910 Switch Series
Product
Code Description
Central
wavelength
(nm)
Fiber
diameter
(μm)
Multimode
fiber modal
bandwidth
(MHz*km)
Maximum
transmission distance
JD089B HP X120 1G SFP
RJ45 T Transceiver N/A Category-5
twisted pair N/A 100 m (328.08 ft)
JD118B HP X120 1G SFP LC
SX Transceiver 850
50/125 500 550 m (1804.46 ft)
400 500 m (1640.42 ft)
62.5/125 200 275 m (902.23 ft)
160 220 m (721.78 ft)
JD119B HP X120 1G SFP LC
LX Transceiver 1310
9/125 N/A 10 km (6.21 miles)
50/125 500 550 m (1804.46 ft)
400
62.5/125 500 550 m (1804.46 ft)
JD061A
HP X125 1G SFP LC
LH40 1310nm
Transceiver
1310 9/125
N/A 40 km (18.64 miles)
JD062A
HP X120 1G SFP LC
LH40 1550nm
Transceiver
1550 9/125
N/A 40 km (24.86 miles)
JD063B HP X125 1G SFP LC
LH70 Transceiver 1550 9/125
N/A 70 km (43.50 miles)
JD098B
HP X120 1G
SFP LC BX
10-U
Transceiver
The
two
mod
ules
must
be
used
toget
her.
TX: 1310nm
RX: 1490nm 9/125 N/A 10 km (6.21 miles)
JD099B
HP X120 1G
SFP LC BX
10-D
Transceiver
TX: 1490nm
RX: 1310nm 9/125 N/A 10 km (6.21 miles)
NOTE:
To guarantee the functionality of the SFP ports, always use HP SFP transceiver modules on the HP V1910
Switch Series.
The SFP transceiver modules available for this switch series are subject to change over time. For the mos
t
up-to-date list of SFP transceiver modules, consult your HP sales representative or technical support
engineer.
For the SFP transceiver module specifications, see the
HP A-Series Switches Transceiver Modules User
Guide
.

9
LEDs
Table 6 LEDs
LED Device su
pp
ort
Descri
p
tion
Power LED All series See “Power LED.”
RPS status LED HP V1910-24G-PoE
(365W) Switch JE007A See “RPS status LED.”
Port mode LED
HP V1910-24G-PoE
(170W) Switch JE008A and
HP V1910-24G-PoE
(365W) Switch JE007A
See “Port mode LED.”
10/100/1000Base-T
auto-sensing Ethernet port
status LED
All series See “10/100/1000Base-T auto-sensing
Ethernet port status LED.”
1000Base-X SFP interface
status LED All series See “1000Base-X SFP interface status LED.”
Power LED
The power LED indicates the operation status of the switch.
Table 7 Description of the power LED
LED Status Description
Power
Solid green The switch functions properly.
Blinking green (1 Hz) The system is performing power-on self test (POST) or
downloading software.
Blinking green (3 Hz) The POST has failed or another fatal error has been detected.
Off The switch has been powered off.
RPS status LED
The HP V1910-24G-PoE (365W) Switch JE007A provides an RPS status LED on its front panel, indicating
the working status of the RPS of the switch.
Table 8 Description of the RPS status LED
LED Status Descri
p
tion
RPS Solid green The RPS DC input is normal.
Off The RPS unit is not connected or the RPS DC input is abnormal.

10
Port mode LED
The port mode LED on the HP V1910-24G-PoE (170W) Switch JE008A and HP V1910-24G-PoE (365W)
Switch JE007A can display the working status of a port for you to obtain more device information. You
can use the port mode switching button to change the status of the port mode LED.
Table 9 Port mode LED description
LED Status Descri
p
tion
Mode Solid green Indicates port rate.
Blinking green (1 Hz) Indicates port PoE power supply.
10/100/1000Base-T auto-sensing Ethernet port status LED
NOTE:
Each port of the HP V1910-48G Switch JE009A has a bi-color LED indicating its status. Each port of
other models of the V1910 Switch Series has two LEDs, with only one in the ON state at a time.
For each port of the HP V1910-24G-PoE (170W) Switch JE008A and HP V1910-24G-PoE (365W) Switch
JE007A, the port mode LED and the status LED together indicate the port operation status.
Table 10 10/100/1000Base-T auto-sensing Ethernet port LEDs description
Switch model
Port
mode
LED
Ethernet port status LED
Meaning
HP V1910-16G Switch
JE005A
HP V1910-24G Switch
JE006A
N/A
Green
On The port operates at a rate of 1000
Mbps.
Fast blinking Data is being transmitted or received at
1000 Mbps.
Off The port is not up or does not operate at
1000 Mbps.
Yellow
On The port operates at a rate of 10/100
Mbps.
Fast blinking Data is being transmitted or received at
10/100 Mbps.
Off The port is not up or does not operate at
10/100 Mbps.
HP V1910-48G Switch
JE009A N/A
Green
On The port operates at a rate of 1000
Mbps.
Fast blinking Data is transmitted or received at a rate of
1000 Mbps.
Yellow
On The port operates at a rate of 10/100
Mbps.
Fast blinking Data is transmitted or received at a rate of
10/100 Mbps.
Off The port is not up.

11
Switch model
Port
mode
LED
Ethernet port status LED
Meaning
HP V1910-24G-PoE
(170W) Switch JE008A
HP V1910-24G-PoE
(365W) Switch JE007A
Solid
green
(rate
mode)
Green
On The port operates at a rate of 1000
Mbps.
Fast blinking Data is transmitted or received at a rate of
1000 Mbps.
Off The port is not up or does not operate at
1000 Mbps.
Yellow
On The port operates at a rate of 10/100
Mbps.
Fast blinking Data is transmitted or received at a rate of
10/100 Mbps.
Off The port is not up or does not operate at
10/100 Mbps.
Blinking
green
(PoE
mode)
Green
On PoE power supply is normal.
Blinking at 3
Hz
Power consumption of the device
attached to the port exceeds the upper
limit of the power supply consumption of
the port, or the available power of the
switch is not enough for power supply of
the port.
Off No PoE power supply is provided on the
port.
Yellow
On The device connected to the interface is
not a PD device or a PoE failure occurs
Off No PoE power supply is provided on the
port or PoE power supply is normal.
1000Base-X SFP interface status LED
NOTE:
For the HP V1910-24G-PoE (170W) Switch JE008A and HP V1910-24G-PoE (365W) Switch JE007A,
the port mode switching button does not take effect for the 1000Base-X SFP interface LEDs.
Table 11 1000Base-X SFP interface status LEDs description
SFP interface status LED Meanin
g
Solid green The port operates at a rate of 1000 Mbps
The port is transmitting data at 1000 Mbps
Blinking green The LED is fast flashing when data is being received on the port.
Off No link is present on the port.

12
Preparing for installation
Safety recommendations
To avoid any device impairment and bodily injury caused by improper use, observe these rules:
Before cleaning the switch, unplug the power cord of the switch first. Do not clean the switch with
wet cloth or liquid.
Do not place the switch near water or in a damp environment. Prevent water or moisture from
entering the switch chassis.
Do not place the switch on an unstable case or desk. The switch might be damaged severely in case
of a fall.
Ensure proper ventilation of the equipment room and keep the ventilation vents of the switch free of
obstruction.
Connect the yellow-green protection grounding cable before power-on.
Make sure that the operating voltage is as required.
Do not open the chassis to avoid electrical shocks when the switch is operating or just when the
switch is powered off.
Examining the installation site
The V1910 Switch Series must be used indoors. You can mount the switch in a rack or on a workbench,
but make sure:
Adequate clearance is reserved at the air inlet/exhaust vents for ventilation.
The rack or workbench has a good ventilation system.
The rack is sturdy enough to support the switch and its accessories.
The rack or workbench is well grounded.
To ensure normal operation and long service life of your switch, install it in an environment that meets the
requirements described in the following subsections.
Temperature/humidity
You must maintain a proper temperature and humidity in the equipment room. Long-term high humidity
may lead to bad insulation, electricity leakage, mechanical property changes, and metal corrosion.
However, if the relative humidity is too low, captive screws may become loose as the result of contraction
of insulation washers and static electricity may be produced in a dry environment to jeopardize the
circuits on the device. A high temperature is the most undesirable condition, because it accelerates the
aging of insulation materials and thus significantly lowers reliability and service life of the switch.
For the temperature and humidity requirements of different models, see Table 1.

13
Cleanness
Dust buildup on the chassis may result in electrostatic adsorption, which causes poor contact of metal
components and contact points, especially when indoor relative humidity is low. In the worst case,
electrostatic adsorption can cause communication failure.
Table 12 Dust concentration limit in the equipment room
Substance Concentration limit (
p
articles/m3)
Dust ≤3 x 104 (no visible dust on the tabletop over three days)
Note: The dust diameter is greater than or equal to 5 μm.
The equipment room must also meet strict limits on salts, acids, and sulfides to eliminate corrosion and
premature aging of components, as shown in Table 13.
Table 13 Harmful gas limits in the equipment room
Gas Maximum concentration (m
g
/m3)
SO20.2
H2S 0.006
NH30.05
Cl20.01
EMI
All electromagnetic interference (EMI) sources, from outside or inside of the switch and application
system, adversely affect the switch in a conduction pattern of capacitance coupling, inductance coupling,
electromagnetic wave radiation, or common impedance (including the grounding system) coupling. To
prevent EMI, take the following actions:
As the AC power system is a TN system, use a single-phase three-wire power receptacle with a
protection earth (PE) to filter interference from the power grid.
Keep the switch far away from radio transmitting stations, radar stations, and high-frequency
devices.
Use electromagnetic shielding, for example, shielded interface cables, when necessary.
Route interface cables only indoors to prevent signal ports from getting damaged by over-voltage
or over-current caused by lightning strikes.
Laser safety
The V1910 Switch Series is a line of class 1 laser devices.
CAUTION:
W
hen an SFP module on a V1910 switch is operating, do not stare into the optical port because the laser
light emitted from the optical fiber may hurt your eyes.