Panasonic Swtich-M48eG 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
Swtich-M48eG
Model No. PN28480K-TH
PN28480K-MY
PN28480K-ID
PN28480K-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
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
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.
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
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.

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

4
WARNING
CAUTION
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.
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.

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.
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.
Failure to satisfy the conditions above may result in fire, electric shock, equipment failure,
and/or malfunction. Note that such events are not covered by the warranty.
Please use this Switching Hub where the ambient temperature is between 0 and 50°C (when
the fan is set to high speed, factory default settings) or 0 and 40°C (when the fan is set to low
speed).
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.
Additionally, do not cover the bent hole of this Switching Hub.
Deviation could lead to high internal temperature, equipment failure and/or malfunction.
When using two Switching Hubs, do not stack them. When you place them side by side, allow
for a space of 20 mm or more between them.
When stacking Switching Hubs, leave a minimum of 20 mm space between them.

If an extension module other than the optional extension modules (PN54021K/PN54023K) is
inserted into the SFP extension slot, operation is not guaranteed. For the latest information
about compatible SFP extension modules, check our website.
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.
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

Product Outline
Switch-M48eG is an Ethernet Switching Hub with management function having 44 ports
of 10/100/1000BASE-T and 4 pairs 10/100/1000BASE-T ports and SFP extension slot,
one of which is selectable.
1.1 Features
7
1
 Has wire-speed Layer 2 switching function.
 Has a loop detection function, which notifies when a loop occurs with the
corresponding port LED and automatically shuts down the looped port.
In addition, when a port is shut down and when it automatically recovers, an SNMP
trap can be sent to notify the administrator.
 Has a loop detection history function, which notifies when a loop occurs with the
corresponding LED and enables a network administrator to identify the looped port
after the loop is removed.
 Embedded power saving mode detects the connection status automatically and
saves power consumption to minimum.
 Use of LED indicator switching button saves power consumption of LED lamps.
 Ports 1 to 48 are auto negotiation-ready 10/100/1000BASE-T ports. Their speed and
communication mode can be changed by configuration.
Ports 45-48 can be used as a 10/100/1000BASE-T port corresponding to auto
negotiation or an SFP extension slot exclusively.
 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 44 are set at MDI-X. (default))
 VLAN function allows free grouping of up to 256 VLANs.
 The IEEE802.1p compatible QoS function is supported.
 Has an Internet Mansion function, which ensures security between each door.
 Has a port grouping function, which groups ports that are allowed to communicate
with one another to limit communications between different groups.
 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.
 The IEEE802.1X compatible user authentication function (EAP-MD5/TLS/PEAP) is
supported.

1.2 Specifications
8
Product Outline
1
Interface Twisted pair port 1-48: RJ45 connector
Transmitting and receiving network system
IEEE802.3 10BASE-T
IEEE802.3u 100BASE-TX
IEEE802.3ab 1000BASE-T
Energy Efficient Ethernet
IEEE802.3az (LPI only)
SFP extension slot port 45-48
Transmitting and receiving network system
IEEE802.3z
Note: Select either of RJ45 or SFP for use
Console port: RJ45 connector
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/SFP: Max. 1,488,000 pps/port
MAC Address table: Max. 16 K entry/unit
Buffer: 1.5 M byte/unit
Note: EAP frame, BPDU frame transmission
Link Aggregation IEEE802.3ad (Static only)
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
Port monitoring 1 : n
Port grouping Communication control is available only for ports in the same group.
(Up to 256 groups can be registered.)
Management method
Low-noise fan control
Low-noise fan
control
Operating environment
temperature
Remarks
SNMPv1/v2c/v3, Telnet, SSHv2, WEB, Console
High speed 0–50°CFactory default
Set the fan to high speed when using this
Switching Hub where the operating environment
temperature is between 0 and 50°C.
0–40°C
Low speed
Set the number of revolutions of the fan according to the operating
environment temperature.
Loop detection Ports 1-44: ON, Ports 45-48: OFF (default setting)
Port shout-off time: 60-86400 sec (default setting is 60 sec)
Port history hold time: 3 days
Others IEEE802.1X Authentication function (port-base)
Access Contorl function,Storm Control function,
Multicast-address-group entry function,DDM function

Power supply
AC 100-240 V, 50/60 Hz, 2.5 A
Power consumption
Normally, Max. 34.6 W, Min. 13.7 W
Storage environment
Temperature: -20–70°C, Humidity: 10–90% RH (no condensation)
Mass (Weight)
4,200 g
External dimensions
44 mm (Height) × 440 mm (Width) × 322 mm (Depth) (Excluding protruding sections)
Operating environment
Temperature: 0–50°C, Humidity: 20–80% RH (no condensation)

1.3 Accessories
9
Installation Guide (this document) 1
CD-ROM (PDF version of Operating Instructions) 1
Mounting bracket (for 19-inch rack) 2
Screw (for 19-inch rack) 4
Screw (for fixing the main unit and the mounting bracket) 8
Rubber foot 4
Power cord 1
* Just the PN28480K-TH has 1 Installation Guide in Thai (a total of 2 guides).
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, PWR 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, PWR LED (Power) and STATUS/ECO LED
(Status/ECO mode) light in green, and the Switching Hub starts operation as a
Switching Hub.
When this Switching Hub successfully communicates with a terminal connected to a
port, the Port LED lights up.
When the terminal is not operating normally, for example when power is not
supplied to the terminal, the Port LED does not light up.
Quantity
For configuration and management method, please see the PDF version
Operating Instructions in CD-ROM.
[Optional accessories]
PN54021K-XX 1000BASE-SX SFP Module
PN54023K-XX 1000BASE-LX SFP Module
The XXs are identical to the intended nation of delivery codes.
(*)
[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
PN28480K-TH
PN28480K-ID
PN28480K-MY
PN28480K-SG
Power Cord Rating FUSE Rated Current Plug Type

Part Names and Functions
10
2
10/100/1000BASE-T port
Console port
Power cord hook block MAC Address label
Ground terminal Serial number label Power port
Back panel
Front panel
SFP extension slot
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 1–48)
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 (port 45–48)
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
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
Magnified view on the next page

11
PWR LED (Power)
Green Light : Power is ON.
Off : Power is OFF.
ANY/COL. LED (Collision)
Orange Light : During half-duplex operation, packet collision is occurring in either
port.
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 shop.)
Off : Power is OFF.
GIGA LED (GIGA mode)
Green Light : Operating in GIGA mode.
100M LED (Speed mode)
Green Light : Operating in Speed mode.
FULL LED (DUPLEX mode)
Green Light : Operating in DUPLEX mode.
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.
LED DISPLAY CHANGE BUTTON
Using "LED DISPLAY CHANGE BUTTON" on the front panel, you can switch the
following operations: indication of a connection status with a connected terminal
(Status mode), indication of communication speed at 1000 Mbps (GIGA mode),
indication of communication speed at 100 Mbps or 10 Mbps (Speed mode), indication
of transmission mode of full-duplex or half-duplex (DUPLEX mode), indication of a port
having a history of loop occurrence (Loop History mode), or turning off LEDs of all ports
(ECO mode).
Mode at booting is called as Base mode.
There are two types of Base modes, which are Status mode (default setting at
shipment) and ECO mode.
To switch the Base mode, keep pressing "LED DISPLAY CHANGE BUTTON" for 3
seconds or more.
When switching is done successfully, 4 LEDs of STATUS/ECO LED, GIGA LED, 100M
LED, and FULL LED are lighted once at the same time, they turned off, and then it
enters a Base mode.
After switching to GIGA mode, Speed mode, DUPLEX mode, or Loop History mode,
and "LED DISPLAY CHANGE BUTTON" is not used for 1 minute, it automatically returns
to Base mode (Status mode or ECO mode).
Base mode is held even if power supply was turned OFF.
Power LED
Collision LED
Status/ECO mode LED
GIGA mode LED
Speed modeLED
DUPLEX mode LED
Loop History mode LED
LED DISPLAY
CHANGE BUTTON

12
Port LED
Left
Right
Port LED (Left)
Display mode
STATUS/ECO
Behavior Description
Green Light Link is established.
Green Blink Transmitting and receiving data.
Off No device connected.
Port LED of 1–48 indicates each mode in the following way:
GIGA Green Light Link is established at 1000 Mbps.
Off Link is established at 100 Mbps or
10 Mbps, or no device is connected.
100M Green Light Link is established at 100 Mbps.
Off Link is established at 1000 Mbps or
10 Mbps, or no device is connected.
FULL Green Light Link is established at full-duplex.
Off Link is established at half-duplex or
no device is connected.
-
Orange Light Shutting down by loop detection.
Off Not shutting down by loop
detection.
LOOP HISTORY Green Light Loop has been detected within the
last 3 days.
Off No loop detection history.
Port LED (Right)
Part Names and Functions
2

13
Using "LED DISPLAY CHANGE BUTTON" on the front panel, you can switch the
following operations: indication of a connection status with a connected terminal
(Status mode), indication of communication speed at 1000 Mbps (GIGA mode),
indication of communication speed at 100 Mbps or 10 Mbps (Speed mode), indication
of transmission mode of full-duplex or half-duplex (DUPLEX mode), indication of a
port having a history of loop occurrence (Loop History mode), or turning off LEDs of
all ports (ECO mode).
LED DISPLAY CHANGE BUTTON
Mode at booting is called as Base mode. There are two types of Base modes, which
are Status mode (default setting at shipment) and ECO mode.
To switch the Base mode, keep pressing "LED DISPLAY CHANGE BUTTON" for 3
seconds or more.
When switching is done successfully, 5 LEDs of STATUS/ECO LED, GIGA LED, 100M
LED, and FULL LED are lighted once at the same time, they turned off, and then it
enters a Base mode. After switching to PoE mode, GIGA mode, Speed mode, DUPLEX
mode, or Loop History mode, and "LED DISPLAY CHANGE BUTTON" is not used for 1
minute, it automatically returns to Base mode (Status mode or ECO mode). Base
mode is held even if power supply was turned OFF.
How to switch the display using the LED DISPLAY CHANGE BUTTON
Two Base modes and other modes
2.1 LED display change

14
Switch two types of Base modes and their LEDs in the following way:
When Base mode is Status mode (factory default setting)
When Base mode is ECO mode
Switch Base mode (keep pressing "LED DISPLAY
CHANGE BUTTON" over 3 seconds)
Press "LED DISPLAY CHANGE BUTTON" manually.
Automatic
Automatically returns to Base mode after 1 minute.
Boot
Status mode
(Base mode) GIGA mode Speed mode DUPLEX
mode
Loop History
mode
Note: The base mode is maintained even when the power is turned OFF.
LED lamps for each mode and LED lamps for ports 1 to 48 correspond as shown in
Table 1 (see page 10).
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) or by pressing "LED DISPLAY CHANGE BUTTON" for 10 seconds
or more. (The default setting is ON.) When it is switched successfully, LOOP HISTORY LED
lights up and setting is complete.
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.
Press "LED DISPLAY CHANGE BUTTON" manually.
Automatic
Automatically returns to Base mode after 1 minute.
Boot
ECO mode
(Base mode)
Status
mode
GIGA
mode
Speed
mode
DUPLEX
mode
Loop history
mode
Part Names and Functions
2

Installation and Configuration
3.1 Mounting to rack
15
3
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.
The main unit can be placed 20 mm back on the rack by changing the bracket fixing
position.
20 mm

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

17
Screen 1 Screen 2
Screen 3
Screen 5
Screen 4
* 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 operated at temperatures in the range of 40°C (when the fan is
set to low speed)or50°C (when the fan is set to high speed)?
Ensure that the operating temperature is within the specified range.
The use of this Switching Hub outside the operating ambient temperature range
causes the protective device to trip, stopping the PoE power supply.
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.
Did you select a correct Port LED display mode using the LED DISPLAY CHANGE
BUTTON?
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 green.
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 communication mode setting is incorrect, the operation may be being
performed in the half-duplex mode.
Please reconfirm autonegotiation setting.
Do not set the connected equipment to forced full-duplex.
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?
When the Power Saving Mode (power saving mode of the MNO series) or EEE (IEEE
802.3az Energy Efficient Ethernet function) is enabled, some connected terminals
may not be correctly linked. Change the setting as follows.
1. Change the Power Saving Mode setting to Disabled.
2. Change the EEE (IEEE 802.3az) setting to 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.
* For detailed configuration and management method, please see
the PDF version Operating Instructions in CD-ROM.