Panasonic Switch-M16eGLPWR+ Series User manual

Installation Guide
 Thank you for purchasing our product.
 This document provides important information about safe and proper
operations of this Switching Hub.
 Please read the "Important Safety Instructions" on pages from 3 to 5.
 Any problems or damage resulting from disassembly of this Switching Hub
by customers are not covered by the warranty.
I0716-10719 Printed in Japan
Switch-M16eGLPWR+
Model No. PN28168-TH
PN28168-MY
PN28168-ID
PN28168-SG
2-12-7, Higashi-Shimbashi, Minato-ku, Tokyo Japan, 105-0021
©2019

Contents
2
Important Safety Instructions
Basic Instructions for the Use of This Product
1 Product Outline
1.1 Features
1.2 Specifications
1.3 Accessories
1.4 Basic operation
2 Part Names and Functions
2.1 LED display change
2.2 PoE power supply function
3 Installation and Configuration
3.1 Mounting to rack
3.2 Configuration of IP address (Basic)
Troubleshooting
3
6
7
7
8
9
9
10
13
14
15
15
16
18

3
This chapter contains important safety instructions for preventing bodily
injury and/or property damage. You are required to follow them.
Do not use power supply other than AC 100 - 240 V.
Deviation could lead to fire, electric shock, and/or equipment failure.
Do not handle the power cord with wet hand.
Deviation could lead to electric shock, and/or equipment failure.
Do not handle this Switching Hub and connection cables during a
thunderstorm.
Deviation could lead to electric shock.
Do not disassemble and/or modify this Switching Hub.
Deviation could lead to fire, electric shock, and/or equipment failure.
Do not damage the power cord. Do not bend too tightly, stretch, twist, bundle
Do not unplug nor plug in the power plug with wet hands.
Deviation could lead to electrical shock, and/or equipment failure.
Do not insert nor drop any foreign objects such as metal or readily combustible
things into the inside through the openings.
Deviation could lead to fire, electrical shock, and/or equipment failure.
Do not store or use the Switching Hub in places where it might get splashed
with liquids such as water, in places with a lot of humidity, in places with
conductive dust, or in places where there are corrosive and combustible gases.
Deviation could lead to fire, electrical shock, and/or equipment failure.
Do not store or use the Switching Hub in places where it will be exposed to
direct sunlight or high temperatures.
The temperature inside will rise, which may cause fire.
Do not store or use the Switching Hub in places where there are lots of
vibrations and impacts, or in unstable areas.
It might fall, which may cause injuries and/or equipment failure.
with other cord, pinch, put under a heavy object and/or heat it.
Damaged power cord could lead to fire, short, and/or electric shock.





This symbol indicates a potential hazard
that could result in serious injury or death.
 Severity of bodily injury and/or property damage, which could result from incorrect
use of the Switching Hub, are explained below.
 The following symbols are used to classify and describe the type of instructions to
be observed.
Important Safety Instructions
WARNING
CAUTION This symbol indicates safety instructions.
Deviation from these instructions could lead
to bodily injury and/or property damage.
This symbol is used to alert
users to what they must do.
This symbol is used to alert
users to what they must not do.
WARNING

4
Do not put the Switching Hub into fire.
Deviation could lead to explosion and/or fire.
Do not insert nor drop any foreign objects such as metal or readily combustible
things into the inside through the openings, twisted pair ports, console ports,
or SFP extension slots.
Deviation could lead to fire, electrical shock, and/or equipment failure.


Use the bundled power cord (AC 100 – 240 V specifications).
Deviation could lead to electric shock, malfunction, and/or equipment failure.

Unplug the power cord in case of equipment failure.
Deviation, such as keeping connected for a long time, could lead to fire.

Connect this Switching Hub to ground.
Deviation could lead to electric shock, malfunction, and/or equipment failure.

Connect the power cord firmly to the power port.
Deviation could lead to electric fire, shock, and/or malfunction.

Unplug the power cord if the STATUS LED blinks in orange (system fault).
Deviation, such as keeping connected for a long time, could lead to fire.





Handle the Switching Hub carefully so that fingers or hands may not be
damaged by twisted pair port, SFP extension slot, console port, or power
cord hook block.
CAUTION
WARNING
Do not connect any other devices except for 10BASE-T/100BASE-TX/1000BASE-T
devices to the twisted pair ports.
Deviation could lead to equipment failure.
Do not insert any other modules except for the our optional SFP module
(PN54021K/PN54023K) to the SFP extension slots.
Unplug the power plug when there is a malfunction.
Deviation could lead to fire if the power is allowed to be supplied for extended periods
of time.
Be sure to connect the ground cable.
Otherwise this might cause electrical shocks, misoperations and malfunctions.
Connect the Switching Hub via the supplied power cord to the outlet which is
connected to the ground.
If the outlet is not connected to a ground, connect the ground cable to the ground
terminal screw.

Important Requests on Protection from Lightning Strike
If you connect a network camera, a wireless access point, or other devices that can be
affected by a lightning strike (in particular, devices installed outdoors) to the twisted pair
port of this Switching Hub, a lightning surge current/voltage may be conducted to this
Switching Hub through the twisted pair cable, leading to malfunction. If you connect such a
device, it is strongly recommended that you install a surge protective device (SPD) on the
twisted pair port side of this Switching Hub.
A lightning surge current/voltage may be conducted to this Switching Hub through the
power supply or ground wire connected to the power port, leading to malfunction. If a
lightning surge current/voltage may flow in through the power supply or ground wire, it is
recommended that you install a surge protective device (SPD) on the power port side of this
Switching Hub.
5
CAUTION






This Switching Hub is to be periodically serviced in order to maintain its
performance.
Please choose a product administrator, and have them be sure to implement
periodic maintenance. When doing maintenance, check the inspection chart that is
posted on our website which has the requisite items listed on it.
When using this Switching Hub to design systems, use it after applying
appropriate measures such as setting up redundant configurations.
Communications failures might be generated due to causes such as malfunctions or
misoperations while the Switching Hub is being used.
When using this Switching Hub for applications which require extremely high
reliability, be careful to expend all possible means to ensure safety and
reliability.
This Switching Hub was not designed nor manufactured with the intention that it be
used for applications (in use with railways, aviation, and medical care, etc. whereas
the influence rate due to communications failures is extremely high in regard to
systems that directly affect systems and human lives) which require extremely high
reliability.
It is strongly recommended that a lightning arrester (SPD) be installed on the
twisted pair port side and the power supply side of this Switching Hub.
Malfunctions might be caused due to overcurrent and overvoltage due to the effects
of lightning strikes.
It is recommended that this Switching Hub be replaced about five years after it
has been installed.
This may vary depending upon conditions such as utilisation rates and usage
environments, but performance might decrease due to the age-related degradation,
etc. of components.
Be careful in regards to environmental restrictions whereby the Switching Hub
can be used.
Please isolate the business power lines and communications lines. Isolate distribution
lines and other distribution lines, and low current power lines, optical fiber cables,
metallic water conduits, and gas conduits, etc. Noise may be generated in the
communications lines which might cause communications glitches.

Basic Instructions for the Use of This Product
For inspection and/or repair, consult the retailer.
Use commercial power supply from a wall socket, which is close and easily accessible to this
Switching Hub.
Unplug the power cord when installing or moving this Switching Hub.
Unplug the power cord when cleaning this Switching Hub.
Use this Switching Hub within the specifications. Deviation could lead to malfunction.
If you install this Switching Hub at a high place, securely fix it on the wall with screws.
Do not touch the metal terminal of the RJ45 connector, the modular plug of connected
twisted pair cable. Do not place charged objects in the proximity of them. Static electricity
could lead to equipment failure.
Do not put the modular plug of the connected twisted pair cable on objects that can carry
static charge, such as carpet. Do not place it in the proximity. Static electricity could lead to
equipment failure.
Do not put a strong shock, including dropping, to this Switching Hub. Deviation could lead to
equipment failure.
Before connecting a console cable to the console port, discharge static electricity, for example
by touching metal appliance (do not discharge by touching this Switching Hub).
Do not store and/or use this Switching Hub in the environment with the characteristics listed
below.
(Store and/or use this Switching Hub in the environment in accordance with the
specification.)
- High humidity. Possible spilled liquid (water).
- Dusty. Possible static charge (such as carpet).
- Under direct sunlight.
- Possible condensation. High/low temperature exceeding the specifications environment.
- Strong vibration and/or strong shock.
Please use this Switching Hub in place where ambient temperature is from 0 to 50°C.
Failure to satisfy the conditions above may result in a fire, electric shock, equipment failure,
and/or malfunction. Such events are not covered by the warranty.
Do not block the ventilator of the Switching Hub.
Blocked ventilator induces the heat accumulation inside, causing equipment failure and/or
malfunction.
If used at a temperature out of the operating temperature range, the protection equipment
becomes activated and PoE power supply stops.
When stacking Switching Hubs, leave a minimum of 20 mm space between them.
Operation is not guaranteed if a module other than the optional SFP extension modules
(PN54021K/PN54023K) is inserted into the SFP extension slot.
For the latest information about compatible SFP extension modules, check our website.
2. The contents described in this document may be changed without prior notice.
3. For any question, please contact the retailer where you purchased the product.
6
1. Please note that Panasonic shall not bear any liability whatsoever for any damages
(this shall include lost earnings, lost opportunities, etc. but this is not restricted to these
things) which were generated in relation to damages caused by operations and usage,
or the inability to use this Switching Hub, whereby the customer does not follow
this Installation Guide.

Product Outline
Switch-M16eGLPWR+ is an Ethernet Switching Hub with management function having
16 ports of 10/100/1000BASE-T and two pairs of 10/100/1000BASE-T ports and SFP
extension slot, one of which is selectable.
Ports 1 to 16 support IEEE802.3at PoE power supply function.
1.1 Features
7
1
 Has wire-speed Layer 2 switching function.
 Ports 1 to 16 are 10/100/1000BASE-T ports corresponding to auto negotiation.
Also their speed and communication mode can be switched by configuration.
Ports 17 and 18 can be used as a 10/100/1000BASE-T port corresponding to auto
negotiation or an SFP extension slot exclusively.
 Ports 1 to 16 can supply power conforming with IEEE802.3at. Supplying power up to
30 W per port, and up to 185 W in total is possible.
 All twisted pair ports support straight/cross cable auto sensing function. Simply
connect devices with straight cables, whether it is a terminal or a network device.
(This function does not work if the port communication configuration is set at Fixed
or Link Aggregation. Ports 1 to 16 are set at MDI-X. (default))
 Telnet allows remote configuration changes and verifications of the Switching Hub.
Remotely configure the PoE settings for each port (Ports 1 to 16).
Equipped with energy efficient Ethernet (EEE) conforming to IEEE802.3az (LPI).
When there is no data transmission at link up, the energy-saving state automatically
starts so that power consumption can be reduced on each port.
 Embedded power saving mode detects the connection status automatically and
saves power consumption to minimum.
 VLAN function allows free grouping of up to 256 VLANs.
 The IEEE802.1w Rapid Spanning Tree Protocol is supported, allowing to build a
system with redundancy.
 The IEEE802.1p compatible QoS function is supported.
 The IEEE802.1X compatible user authentication function (EAP-MD5/TLS/PEAP) is
supported.
 Has an Internet Mansion function, which ensures security between each door.
Due to the loop detection/shutoff function, a port where loop has occurred can be
automatically shut off to prevent loop failures. When a port is shut off and
recovered automatically, SNMP trap can be sent to notify the incident to the
administrator. Moreover, the port with a loop can be identified by loop notification
on the LEDs on the main unit and referring the history of loop on the setting screen.
The PoE scheduler function enables scheduling of PoE power supply control.

1.2 Specifications
8
Product Outline
1
Interface Twisted pair port 1–18: RJ45 connector
Transmitting and receiving network system
IEEE 802.3 10BASE-T
IEEE 802.3u 100BASE-TX
IEEE 802.3ab 1000BASE-T
SFP extension slot 17,18
* Select either of RJ45 or SFP for use
IEEE 802.3z
Console port: RJ45 connector
Transmitting and receiving network system
RS-232C (ITU-TS V.24)
Switching mode Store and Forward method: Forwarding rate
10BASE-T: Max. 14,880 pps/port
100BASE-TX: Max. 148,800 pps/port
1000BASE-T: Max. 1,488,000 pps/port
MAC Address table: Max. 8K entry/unit
tinu/etyBK215:reffuB
Link Aggregation IEEE802.3ad
Configurable up to 8 groups (Max. 8 ports per group)
VLAN IEEE802.1Q tagging VLAN protocol compatible
(Max. 256 groups including the default VLAN)
Port based VLAN, Internet Mansion function
QoS IEEE802.1p compatible, Supports 4 priority queues
Management method SNMP v1/v2c, Telnet, Console, SSH v2, WEB control screen
Power supply function Ports 1 to 16 support the IEEE802.3at compatible power supply
function.
Maximum power supply: 30 W per port, 185 W in total
Power supply method Alternative A (Using signal line, 1, 2, 3, 6)
Others IEEE802.1D spanning tree, rapid spanning tree
IEEE802.1X authentication function supported (port-base
authentication)
Port monitoring, ring protocol, IGMP snooping,
loop detection/shutoff function, storm control, DSCP mapping
function,login RADIUS function, DHCP client function,
PoE scheduler function
Power supply AC 100-240 V, 50/60 Hz, 4.5 A
Power consumption Normally, Max. 229 W (27.5 W when not supplying power),
Min. 17.4 W
Storage environment Temperature: -20–70°C, Humidity: 10–90% RH (no condensation)
Mass (Weight) 3,100 g
External dimensions 44 mm (Height) × 330 mm (Width) × 230 mm (Depth) (Excluding
protruding sections)
Operating environment Temperature: 0–50°C, Humidity: 20–80% RH (no condensation)
Caution: Failure to meet the above conditions may result in
fire, electric shock, breakdown, and/or malfunction.
Please take notice because such cases are out of
guarantee.
Energy Efficient Ethernet function
IEEE 802.3az (LP1)
SFP-8472 (DMI:Diagnostic Monitoring Interface)

1.3 Accessories
9
1 (*))tnemucodsiht(ediuGnoitallatsnI
1)snoitcurtsnIgnitarepOfonoisrevFDP(MOR-DC
Rubber foot 4
Mounting bracket (for 19-inch rack)  2

Screw (for 19 inch rack)

4
Screw (for fixing the main unit and the 19 inch rack mount bracket)
8

Power cord 1
Please be sure to confirm the content.
Please contact our distributor if any of the contents are insufficient.
1.4 Basic operation
This Product does not have a power ON/OFF switch. Connect the supplied power
cord to this Switching Hub and connect the other end into an electric outlet.
This Switching Hub operates at AC 100 - 240 V (50/60 Hz).
When power is supplied, all the LEDs are turned ON.
Then, POWER LED (Power) lights in green, STATUS/ECO LED (Status/ECO mode)
lights in orange, and self-diagnosis of hardware is executed.
On completion of self-diagnosis, POWER LED (Power), STATUS/ECO LED
(Status/ECO mode) and TEMP LED (Temperature sensor) light in green, and the
Switching Hub starts operation as a Switching Hub.
As this Switching Hub succeeds in communicating with a terminal connected to each
port, LED of the port lights up.
When the terminal is not operating normally, for example when power is not
supplied to the terminal, LED is not lighted.
Quantity
For configuration and management method, please see the PDF version
Operating Instructions in CD-ROM.
* Just the PN28168-TH has 1 Installation Guide in Thai (a total of 2 guides).
[Optional accessories]
PN54021K-XX 1000BASE-SX SFP Module
PN54023K-XX 1000BASE-LX SFP Module
[Power Cord]
The following power cords are supplied as per the intended nation of delivery.
Locale
Thailand 250 VAC 6 A TIS166-2549-
Indonesia 250 VAC 10 A
250 VAC 10 A
250 VAC 5 A
CEE7/7
BS1363
BS1363
-
13 A
5 A
Malaysia
Singapore
Product Number
PN28168-TH
PN28168-ID
PN28168-MY
PN28168-SG
Power Cord Rating FUSE Rated Current Plug Type
The XXs are identical to the intended nation of delivery codes.

Part Names and Functions
10
2
MAC Address label
Power port
Serial number label
Power cord hook block
10/100/1000BASE-T ports supporting PoE power 10/100/1000BASE-T port
Back panel
Power port
Connect the supplied power cord to this port and connect the other end into an
electric outlet.
Power cord hook block
If the supplied power cord is hanged to this block, the cord becomes hard to pull
out from the power port.
Ground terminal
Only qualified personnel should install minimum 18AWG green-and-yellow stranded
copper wire to Ground terminal screw.
10/100/1000BASE-T port (ports 1–16) supporting PoE power supply
The port can supply PoE power conforming with IEEE802.3at. Connect a Powered
Device conforming with IEEE802.3at. Devices such as 10/100/1000BASE-T terminal,
hub, repeater, bridge, and Switching Hub can be connected to this port. Install the
device so that the length of twisted pair cable (CAT5e or above) becomes 100 m or less.
10/100/1000BASE-T port (ports 17,18)
Devices such as 10/100/1000BASE-T terminal, hub, repeater, bridge, and Switching
Hub can be connected to this port.
Install the device so that the length of twisted pair cable (CAT5e or above) becomes
100 m or less.
SFP extension slot (ports 17,18)
Install SFP module. (It becomes exclusive usage with twisted pair port.)
When SFP extension slot is linked, the port is automatically switched to SFP
extension mode.
SFP port supports only the full duplex communication.
Console port
SFP extension slot
Ground terminal
Front panel
Console port
Connect a VT100 compatible terminal, etc. with this port to configure or manage
this Switching Hub.
Transmission mode : RS-232C
Transmission speed : 9,600 bps
Stop bit : 1 bit
Flow control : None
Emulation mode : VT100
Data length : 8 bits
Parity control : None
Transmission connector : RJ45

11
POWER LED (Power)
Green Light : Power is ON.
Off : Power is OFF.
STATUS/ECO LED (Status/ECO mode)
Green Light : Operating in status mode.
Green Blink : Operating in ECO mode.
All Port LEDs (left) are turned off.
Orange Light : Starting
Orange Blink : Malfunction (Contact the seller.)
PoE LIM. LED (PoE limit)
Off : Supplying power in the range from 0 to 170 W.
Green Light : Supplying power in the range from 170 to 185 W.
Orange Blink : A single port's power supply is exceeding the upper limit, or
the total power supply of the Switching Hub is exceeding 185 W.
FAN LED (Fan sensor)
Green Light : System is operating normally.
Orange Blink : Fan fault is occurring.
TEMP LED (Temperature sensor)
Green Light : The system is normally operating.
Orange Blink : The temperature exceeded the set threshold of the internal
temperature sensor.
Set threshold of the internal temperature sensor: 65°C
(factory default)
LOOP HISTORY LED (Loop History mode)
Green Light : Operating in Loop History mode.
Green Blink : Loop is occurring, or occurred within the last 3 days.
Power LED Temperature
sensor LED
PoE limit LED
Status/ECO mode LED
Loop History mode LED
Fan sensor LED
Off : No loop detection history.

12
Part Names and Functions
2
• Port LED (Left)
Green Light (when the LOOP HISTORY LED is off)
: Link is established at 10/100/1000 Mbps.
Green Light (when the LOOP HISTORY LED is blinking)
: Within three days after a loop has been eliminated
Green Blink
Orange Light
Off : No terminal is connected or the ECO mode is set.
• Port LED (Right)
Green Light
Orange Blink 
a single port
Off 
connected.
Port LED (Right)
Port LED (Left)
: Power is supplied normally. (Ports 1 to 16 only)
: Overload power supply (ports 1 to 16 only) or overload in
: Power is not supplied or PoE receiving equipment is not
: Data is being sent/received at 10/100/1000 Mbps.
: Shut off by the loop detection/shutoff function

13
2.1 LED display change
About Loop detection
Turns on the port LED with a orange light when a loop occurs in the corresponding port.
At this time, the relevant port automatically shuts down (default setting: 60 sec.) to
prevent loop from occurring.
If the loop is still not removed, the port will shut down again. Remove the loop while the
port is shut down.
During loop is occurring, or if loop has occurred within the latest 3 days, LOOP HISTORY
LED blinks to notify this. It is possible to switch loop detection setting (OFF/ON) by using a
console cable (for detail, see the attached CD-ROM). The default setting is ON.
If you wish to clear loop detection history, turn OFF once the power supply of the
Switching Hub and turn it ON again.
Then, loop detection history is deleted.
The Switching Hub can hold up to 64 loop history logs.
Two types of Base modes
The mode at the start is called “Base mode.”
There are two types of Base modes: Status mode (factory default setting) and ECO mode.
In the Status mode, you can check the terminal connection status by checking Port LED (left) lamps.
In the ECO mode, all Port LED lamps are off.
You can switch between the Status mode and ECO mode by command setting.
(For details, refer to the attached CD-ROM.)

14
When the requested power supply of the Switching Hub exceeds 185 W, causing an overload, you can
check a port that stopped supplying power by changing the mode LED display to that of PoE mode.
Remove the cable from the port with its LED blinking orange to reduce the requested power supply of
the Switching Hub to 185 W or below.
You can set/change the priority of the power supply from the console.
(By factory default, the same priority is given to all Ports 1 to 16.)
Ports 1 to 16 support IEEE802.3at PoE. This function allows for power supply of up to 30 W through
each port and 185W in total through the Switching Hub.
PoE power supply function operation overview
Power supply while the PoE LIM. LED is blinking orange (overload caused by
the total power supplied by the Switching Hub)
When the requested power supply of a single port exceeds 30 W, causing an overload, the power
supply is stopped. You can check a port that stopped supplying power by changing the mode LED
display to that of PoE mode.
Remove the cable from the port with its LED blinking orange.
Caution: 1) Some PoE-powered devices may have a large difference in power consumption between
their maximum power use condition and normal condition. Carefully configure them so
that the upper limit of power supply will not be exceeded.
2) If you don't set a priority for power supply or if the same priority is given, note that the
power supply priority is assigned to the ports in ascending order of the port numbers.
(When the requested power supply exceeds 185W, power supply to a port with a higher
port number will be stopped first.)
Power supply while the overload is caused by a single port
2.2 PoE power supply function
* For configuration and management method, please see the PDF version Operating
Instructions in CD-ROM.
Port LEDs (left) 1 to 16 (with the PoE mode
LED turned on)
Green Light: Supplying power normally.
Orange Blink: Overload caused by a single port.
(Requested power is exceeding
30 W.)
Off: Not supplying power or no
PoE-powered device connected.
* Ports 17 and 18: Always off
PoE LIM. LED (PoE limit)
Off: Supplying power in the range from
0 to 170 W.
Green Light: Supplying power in the range from
170 to 185 W.
Orange Blink: A single port's power supply is
exceeding the upper limit, or the
total power supply of the
Switching Hub is exceeding 185 W.
Part Names and Functions
2

15
3.1 Mounting to rack
Take out the supplied 2 mounting brackets
(for 19-inch rack) and 8 screws (for fixing the
main unit and the mounting bracket), and fix
the brackets to the main unit by tightening
screws into 4 holes located at the sides.
Then, mount this Switching Hub firmly to the
rack using the supplied 4 screws (for 19-inch
rack) or screws furnished at the rack.
Installation and Configuration
3

16
3.2 Configuration of IP address (Basic)
(1) Connect this Switching Hub and PC with a RJ45–DSub 9-pin console cable and
start up the terminal emulator (ZEQUO assist Plus, etc.).
(2) Pressing Enter key 3 times opens Login screen. Enter Login name and Password
(the default is "manager" for both). (Screen 1)
(3) Main Menu is displayed. (Screen 2)
Press "B" to select [B]asic Switch Configuration. The next hierarchical menu is
displayed. (Screen 3)
(4) Press "I" to select System [I]P Configuration. The screen to enter some addresses
is displayed. (Screen 4)
(5) Press "I" to set an IP Address, press "M" to set a Subnet Mask, or press "G" to set
a Default Gateway. Then enter the specified address. (Screen 4)
(6) After completing the settings, select [Q]uit to previous menu twice to return to
Main Menu (Screen 2). Here, select Save Configuration to [F]lash (Screen 5)
and the command prompt changes to "Save current configuration?(Y/N)." Press
"Y" to save the settings.
(7) From terminals connected to network, confirm that the settings are reflected
correctly by executing PING test for entered address.
Installation and Configuration
3

1717
3.2 Configuration of IP address (Basic)
Screen 1
Screen 3
Screen 2
Screen 4
Screen 5
* For the following, please see the PDF version Operating Instructions
in CD-ROM.
- Detailed configuration and management methods using the CLI.
- Configuration and management method from ZEQUO assist Plus.

Troubleshooting
18
If you find any problem, please take the following steps to check.
LED
The POWER LED (Power) is not lit.
Check if the power cord is disconnected. Please confirm that the power cord is
securely connected to the power port.
Is the Switching Hub being used at a temperature between 0 and 50°C.
Use the Switching Hub in its operating temperature range.
Note: If used at a temperature out of the operating temperature range, the
protection equipment becomes activated and PoE power supply stops.
The default operating temperature range is 0 to 50°C.
The Port LED is not lit in Status mode.
Is the cable correctly connected to the target port?
Is the cable appropriate to use?
Is the terminal connected to the relevant port conforming with 10BASE-T,
100BASE-TX, or 1000BASE-T standard?
Auto-negotiation may have failed.
Check the port settings of this Switching Hub or the terminal settings.
The Port LED (Right) lights in orange.
Loop is occurring. By removing the loop, orange LED will be turned off.
LOOP HISTORY LED Blinks in orange.
This is to notify that there is a port in which a loop is occurring, or has been
removed within 3 days.
Communications are slow.
Are the communication speed and mode settings correct?
If the proper communication mode signal cannot be obtained, apply
half-duplex mode.
Please reconfirm autonegotiation setting.
Is not the utilization ratio of the network to which this Switching Hub is
connected too high?
Try separating this Switching Hub from the network.
Communications fail.
Is the link-up correct?
If embedded power saving mode is set to Full, change the setting to Half or
Disabled.
Is the Port LED (Right) lit in orange?
If the Port LED (Right) lit in orange, the port is shut down by the loop detection
function. Eliminate the loop connection of the device connected to the port
first, and then wait longer than the time required for automatic recovery from
the shutdown by the loop detection function, or release the port shutdown
from the setting screen.

19
PoE power supply is impossible.
Power is not supplied to a Powered Device.
If you use an STP cable, PoE power supply may not be possible depending on
the installation environment. In such cases, use a UTP cable.
Is a CAT5e or better straight cable (RJ45-8/8) used?
Is the cable connected to the port 1–16 that supports PoE power supply?
Ensure that either the port alone or the entire equipment is not overloaded.
Is the Powered Device connected to the port compliant with the IEEE802.3at
(30W) standard?
Port LED (Right) is blinking orange:
Ensure that the total power supply demand from PoE-powered devices does
not exceed 185 W .
When the power supply is suddenly shut off:
It is likely that a PoE-powered device in use has a different power consumption
in normal operation and standby states.
After turning on the PoE LED (power supply mode), confirm that a single port
is not overloaded [the Port LED (Left) is not blinking orange] and that the
maximum limit of the total power supply is not exceeded (the PoE LIM. LED is
not blinking orange).
* For detailed configuration and management method, please see
the PDF version Operating Instructions in CD-ROM.