Panasonic GA-ML16TPoE+ User manual

Installation Guide
 Thank you for purchasing our product.
 This document provides important information about safe and proper
operations of this Ethernet Switch.
 Please read the "Important Safety Instructions" on pages from 3 to 6.
 Any problems or damages resulting from disassembly of this Ethernet
Switch by customers are not covered by the warranty.
C0620-20222 Printed in Japan
GA-ML16TPoE+
Model No. PN261693-TH
PN261693-MY
PN261693-ID
PN261693-SG
 The instruction manuals (Menu, Version, CLI Version
Web Version), latest firmware and SDN application
(ZEQUO assist Plus) can be downloaded from the following URL.
https://panasonic.co.jp/ew/pewnw/english/datadownload/index.html
2-12-7, Higashi-Shimbashi, Minato-ku, Tokyo Japan, 105-0021
©
Panasonic Electric Works Networks Co.,Ltd.
Panasonic Electric Works Networks Co.,Ltd. 2022

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 Grounding Cable Connection
3.2 Mounting to rack
3.3 Mounting on a wall
3.4 Configuration of IP address (Basic)
Troubleshooting
3
7
8
8
9
11
11
12
15
17
18
18
19
20
21
23

3
This chapter contains important safety instructions for preventing bodily injury
and/or property damage. Please read carefully, and follow them at all times.
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 Ethernet Switch, 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 what they must do.
This symbol is used to alert
users 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 this Ethernet Switch and connection cables during a
thunderstorm.
Deviation could lead to electric shock.
Do not disassemble and/or modify this Ethernet Switch.
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
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.
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, or drop foreign objects such as metal or combustible things into
Ethernet Switch through the openings, twisted pair ports, console port and SFP
extension slot.
Deviation could lead to fire, electric shock, and/or equipment failure.
Do not store or use the Ethernet Switch 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 Ethernet Switch 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 Ethernet Switch 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.

4
WARNING
CAUTION
Do not put the Ethernet Switch into fire.
Deviation could lead to explosion and/or fire.
Do not connect the console ports with any other console cables except for our
optional PN72001 RJ45-DSub 9-pin console cable.
Deviation could lead to fire, electrical shock, and/or equipment failure.
Do not use the Ethernet Switch in dusty environments such as on floors,
underneath floors, the backside of ceilings, or wiring panels.
Do not use the Ethernet Switch in very dusty areas such as on floors, underneath
floors, the backside of ceilings, or wiring panels. Deviation could lead to fire,
electrical shock, and/or equipment failure. It is recommended that the Ethernet
Switch be operated inenvironments such as the inside of racks where it is difficult
for dust to be generated.
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 keep connecting for a long time, could lead to fire.
Be sure to connect the ground cable.
Otherwise this might cause electrical shocks, misoperations and malfunctions.
Connect the Ethernet Switch 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.
Connect the power cord firmly to the power port.
Otherwise this might cause electrical shocks and malfunctions.
Unplug the power cord if the STATUS/ECO LED (Status/ECO mode) or FAN LED
(Fan sensor) blinks in orange (system fault).
Deviation, such as keep connecting for a long time, could lead to fire.
When mounting the Ethernet Switch on a wall, mount it securely using wall
mount brackets to prevent the Ethernet Switch from falling due its weight and
that of the connection cables.
Deviation could lead to falling, injury and/or equipment failure.
Handle the Ethernet Switch carefully so that fingers or hands may not be
damaged by twisted pair port, SFP extension slot, console port, or power cord
hook block.

Check whether the optical fiber cable connectors are contaminated with dust, etc.
This might cause the optical signal to not be transmitted normally, and cause
misoperations and malfunctions. If they are contaminated, make sure to cleanthem
off, then connect them to the optical fiber ports.
This Ethernet Switch is to be periodically serviced in order to maintain its
performance.
Please assign a product administrator, and 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.

5
CAUTION
When using this Ethernet Switch to design systems, use it after applying
appropriate measures such as setting up redundant configurations.
Communication failures might be generated due to causes such as malfunctions or
misoperations while the Ethernet Switch is being used.
When using this Ethernet Switch for applications which require extremely high
reliability, be careful to expend all possible means to ensure safety and
reliability.
This Ethernet Switch is not designed nor manufactured with the intention that it be
used for applications (in use with railways, aviation, and medical care, etc. where
the influence rate due to communication failures is extremely high in regard to
systems that directly affect systems and human lives) which require extremely high
reliability.
Be aware of glitches which are caused in the usage environments such as
age-related degradation, etc.
This may vary depending upon conditions such as utilization rates and usage
environments, but performance might decrease due to the age-related degradation,
etc. of components. It is recommended that this Ethernet Switch be replaced about
five years after it has been installed.
Be careful in regards to environmental restrictions whereby the Ethernet
Switch can be used.
Please isolate the business power lines and communication 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
communication lines which might cause communication glitches.
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 into the SFP expansion slotsexcept for our
optional SFP modules (PN54022/PN54024).
Deviation could lead to equipment failure.
Check our website for the latest information on supported SFP modules.
Do not connect the console ports with any other device except for Serial
communication terminal.
Deviation could lead to equipment failure.
To connect a power receiving equipment supporting IEEE802.3at to this
Ethernet Switch, use a cable rated Cat5e or higher.
Using other cables may result in heat generation, ignition, and/or equipment failure.
It is strongly recommended that a lightning arrester (SPD) be installed on the
twisted pair port side and the power supply side of this Ethernet Switch.
Malfunctions might be caused due to overcurrent and overvoltage due to the
effects of lightning strikes.

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 Ethernet Switch, a lightning surge current/voltage may be conducted to this
Ethernet Switch 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 Ethernet Switch.
A lightning surge current/voltage may be conducted to this Ethernet Switch 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
Ethernet Switch.
6

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
Ethernet Switch.
Unplug the power cord when installing or moving this Ethernet Switch.
Unplug the power cord when cleaning this Ethernet Switch.
Use this Ethernet Switch within the specifications. Deviation could lead to malfunction.
Do not touch the twisted pair cable modular metal terminals which are connected to RJ45
connectors (twisted pair ports) or the connectors, nor place them near electrically-charged
objects. 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 Ethernet Switch. 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 Ethernet Switch).
Please use this Ethernet Switch in places where the ambient temperatures range from 0 to
50°C and, when the fan setting is set to Low2, or Min and it is used, use it in areas where the
ambient temperatures range from 0 to 40°C.
Do not store, nor use this Ethernet Switch in environments which possess the characteristics
listed below.
(Store and/or use this Ethernet Switch 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 a fire, electric shock, equipment failure,
and/or malfunction. Such events are not covered by the warranty.
*If it is used beyond the operating environmental temperatures, then the protective devices
will start working and the Ethernet Switch power will be shut off.
Do not block the ventilator of the Ethernet Switch.
Blocked ventilator induces the heat accumulation inside, causing equipment failure and/or
malfunction.
If used at a temperature out of the operating temperature range, deviation could lead to
malfunction.
Operation is not guaranteed if a module other than the optional SFP extension modules
(PN54022/PN54024) is inserted into the SFP extension slot.
For the latest information about compatible SFP extension modules, check our website.
When using two Ethernet Switches, do not stack them. When you place them side by side,
allow for a space of 20 mm or more between them. This space is not necessary if you use
supplied connection brackets.
When Ethernet Switches mounting to rack, leave a minimum of 20 mm space between them.
1. Please note that Panasonic shall not bear any liability whatsoever for any damages
(this shall include, but isnotlimited to,lost earnings,lost opportunities, etc.)
which were generated in relation to damages caused by operations and usage,
or the inability to use this Ethernet Switch, 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.
7

Product Outline
GA-ML16TPoE+ is an Ethernet Ethernet Switch with management function having 20ports
of 10/100/1000BASE-T and SFP extension slot, one of which is selectable.
Ports 1 to 16 support IEEE802.3at/af PoE power supply function.
1.1 Features
8
1
 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 to 20 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 and 802.3af. Supplying
power up to 30 W per port, and up to 250 W in total is possible.

Is equipped with PoE auto reboot functions, and monitoring, and the switching of the
power supply OFF/ON to ports is possible via Ping, LLDP, and the 3 traffic volume methods.
 Is equipped with silent fan control functions, and can be set to match the power
supply, and be used with any of the fan rpm, “High”, “Low” and “Min”.
 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/SSH allows remote configuration changes and verifications of the Ethernet Switch.
Remotely configure the PoE settings for each port (Ports 1 to 16).

The connection status for each port is detected by the power saving mode, and it can suppress
the power consumption to required volumes when not linked up. (Factory default: deactivated)
 Rapid Spanning Tree Protocol is supported, allowing to build a system with redundancy.
 The IEEE802.1p compatible QoS function is supported.

Supports triple authentication that can simultaneously wait on IEEE802.1X authentication,
MAC authentication, and WEB authentication via one port, and an authentication
network which is matched to the kinds of connection terminals can be constructed.
 Equipped with step authentication functions, and can prevent illegal access of the terminals.
 Since it is equipped with authentication supplicant functions, a more robust security
configuration can be configured in combination with the upper switch’s IEEE802.1X
authentication functions.
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.
Supports ZEQUO assist Plus. Processes from introduction to maintenance can be
performed easily.

1.2 Specifications
9
Interface
Twisted pair port 1-16: RJ45 connector (*1)
Transmitting and receiving networks system
IEEE802.3 10BASE-T
IEEE802.3u 100BASE-TX
IEEE802.3ab 1000BASE-T
Twisted pair port 17-20: RJ45 connector
Transmitting and receiving networks system
IEEE802.3 10BASE-T
IEEE802.3u 100BASE-TX
IEEE802.3ab 1000BASE-T
(*1) Energy Efficient Ethernet function
IEEE802.3az(LPI)
SFP extension slot 17–20 port
Transmitting and receiving networks system
IEEE802.3z 1000BASE-SX/1000BASE-LX
*Select either RJ45 or SFP for use
SFF-8472 (DMI:Diagnostic Monitoring Interface)
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: Max. 1,488,000 pps/port
MAC Address table: Max. 16K entry/unit
Buffer: 2.0Mbyte/unit
* EAP frame, BPDU frame transmission
Link Aggregation IEEE802.3ad
Configurable up to 10 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 8 priority queues
Management method
ZEQUO assist Plus, SNMP v1/v2c/v3, Telnet, SSH v2, Console,
WEB control screen
Power supply function
Ports 1 to 16 support the IEEE802.3 at/af compatible power supply function.
Maximum power supply: 30W per port, 250W in total
Power supply method Alternative A (Using 1,2,3,6 pin)
Silent fan control The fan rpm can be set in accordance with the usage environments.
If the fan rpm are set, the maximum power supply will be
automatically restricted. If the fan rpm (Fan Speed) are set to Low1,
or Min, the device’s overall maximum power supply (Power Budget)
will be automatically restricted, and it can be used with the fan noise
reduced.
Fan Speed
High
Low
Min.
(Low1)
(Low2)
Operating
environment
temperature
Maximum
power supply Comments
Factory default
0-50°C
250W
250W
185W
185W
0-40°C

10
Product Outline
1
Storage environment Temperature: -20–70°C, Humidity: 10–90% RH (no condensation)
Mass (Weight) 3,000 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)
*If it is used beyond the operating environmental temperatures,
then the protective devices will start working and the Ethernet
Switch power will be shut off.
Others STP/RSTP/MSTP
Supports the IEEE802.1X authentication (MAC-based, port-based)
MAC authentication, WEB authentication, Triple authentication,
STEP authentication, IEEE802.1X supplicant,
Port monitoring, Ring protocol, IGMP snooping,
Loop detection/shutoff function, Storm control, DSCP mapping function,
Login RADIUS function, DHCP client function,
PoE scheduler function, PoE auto reboot function,
Port grouping function, Multi-cast address group registration function
Power supply AC 100-240 V, 50/60 Hz, 5.0 A
Power consumption
Normally, Max. 315 W (23.1 W when not supplying power), Min. 14.7 W

1.3 Accessories
11
Installation Guide (this document) 1 (*)
Rubber foot 4
Rack mount bracket (for 19-inch rack) 2
Screw (for 19-inch rack) 4
Screw (for fixing the mount brackets to the Ethernet Switch) 8
Power cord 1
* Just the PN261693-TH has 1 Installation Guide in Thai (a total of 2 guides).
[Optional accessories]
PN54022-XX 1000BASE-SX SFP Module(i)
PN54024-XX 1000BASE-LX SFP Module(i)
The XXs are identical to the intended nation of delivery codes.
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 Ethernet Switch and connect the other end into an electric outlet.
This Ethernet Switch 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), TEMP LED (Temperature sensor) and FAN LED (Fan sensor) light
in green, and the Ethernet Switch starts operation as a Ethernet Switch.
As this Ethernet Switch 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 the configuration and management method, please see the PDF version
Operating Instructions on Panasonic’s website.
[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
PN261693-TH
PN261693-ID
PN261693-MY
PN261693-SG
Power Cord Rating FUSE Rated Current Plug Type

AC100-240V
CONSOLE
9600.N.8.1（DTE）
SFP▲（19）
SFP▼（20）
SFP▲（17）
SFP▼（18）
LED DISPLAY
CHANGE BUTTON
KEEP PRESSING 3SEC
ECO MODE ON/OFF
ECO MODE
ON･･･BLINK
OFF･･･LIGHT
LEFT LED（ORANGE）：LOOP DETECTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
GA-ML16TPoE+
POWER
PoE LIM.
TEMP
FAN
STATUS/ECO
GIGA
FULL
LOOP
HISTORY
17
18
19
20
12
Part Names and Functions
2
MAC Address label
Power port
Serial Number label
Power cord hook block
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 ports (ports 1-20)
Ports 1 to 16 can supply PoE power confirming with IEEE802.3at/af.
Devices such as 10/100/1000BASE-T terminal, hub, repeater, bridge, and Ethernet
Switch can be connected to this port. Install the device so that the length of twisted pair
cable (CAT5e or above) becomes 100m or less.
SFP extension slot (ports 17-20)
Install SFP module. (It becomes exclusive usage with twisted pair port.)
When SFP extension slot is linked, the ports 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 Ethernet Switch.
Console port
SFP extension slot
Ground terminal
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
Front panel
10/100/1000BASE-TX ports supporting PoE power supply
10/100/1000BASE-TX ports

13
Power LED
LED Display change
button
Temperature sensor LED
PoE LIM. LED
Status/ECO mode LED
GIGA mode LED
DUPLEX mode LED
Loop History mode LED
POWER LED (Power)
Green Light : Power is ON.
Off : Power is OFF.
PoE LIM. LED (PoE limit)
For silent fan control high-speed (High)* For factory default, or low-speed (Low2)
Off : Supplying power in the range from 0 to 235 W.
Green Light : Supplying power in the range from 235 to 250 W.
Orange Blink : A single port's power supply is exceeding the upper limit, or
the total power supply of the Ethernet Switch is exceeding 250 W.
For silent fan control low-speed (Low1), or min-speed (Min)
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 Ethernet Switch is exceeding 185 W.
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: 62°C
(factory default)
FAN (Fan sensor) LED
Green Light : The system is normally operating.
Orange Blink : Fan failure
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 up
Orange Blink : Malfunction (Contact the seller.)
GIGA (GIGA mode) LED
Green Light : Operating in GIGA mode.
FULL (DUPLEX mode) LED
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.
Off : No loop detection.
Fan sensor LED

14
Part Names and Functions
2
Table1. Ports and Port LED lamps 1 to 20 correspond as shown below.
Port LED
Communication LED
(Left)
PoE LED
(Right)
Display mode
STATUS/ECO
Behavior Description
Green Light Link is established.
Green Blink Transmitting and receiving data.
Orange Light
Off
GIGA Green Light Link is established at 1000 Mbps.
Off Link is established at 100 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.
Green Light
Orange Blink
Off
LOOP HISTORY Green Light Loop has been detected within the
last 3 days.
Off No loop detection history.
It is shut off via the loop detection
and shutoff function/storm control or
the BPDU guard.
PoE are being supplied power.
Power is not being supplied, or the
PoE receiving equipment are not
connected.
Also, it is set in the ECO mode.
Single port overload.
Also, an overload of the Ethernet Switch
occurs, and the ports are displayed
which cannot be supplied power.
No device connected or the ECO mode is set.
Orange Blink It is sending and receiving just the
control packet.
Communication LED (Left)
PoE LED (Right)
LEFT LED（ORANGE）：LOOP DETECTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

15
2.1 LED display change
●Display style set by the LED display change button
●Two types of Base modes and each mode
The mode at the start is called “Base mode.”
There are two types of Base modes:Status mode (factory default setting) and ECO
mode.You can change the Base mode by holding down the LED display switch
button (for at least 3 sec).
When the Base mode is changed normally,all STATUS/ECO,GIGA,and FULL LED lamps
light up at the same time.When you release the button,the Base mode is changed to the
selected mode.
If the mode is changed to the GIGA mode,DUPLEX mode,or loop history mode and the
LED display switch button is not used for one minute or longer,the mode automatically
returns to a Base mode (Status mode or ECO mode).
The Base mode is maintained even after the power is turned OFF.
Indication on the front panel and
LED lamps
You can display the following items using the LED display switch button.
Display for the connection with a connected terminal (Status mode),
Display for the 1000 Mbps transmission rate (GIGA mode),
Display for the full-duplex or half-duplex transmission system (DUPLEX mode),
Display for ports with a loop history (Loop history mode),
All port LED lamps can be turned OFF (ECO mode).
LED display change button
CONSOLE
9600.N.8.1（DTE）
SFP▲（19）
SFP▼（20）
SFP▲（17）
SFP▼（18）
LED DISPLAY
CHANGE BUTTON
KEEP PRESSING 3SEC
ECO MODE ON/OFF
ECO MODE
ON･･･BLINK
OFF･･･LIGHT
LEFT LED（ORANGE）：LOOP DETECTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
GA-ML16TPoE+
POWER
PoE LIM.
TEMP
FAN
STATUS/ECO
GIGA
FULL
LOOP
HISTORY
17
18
19
20

16
Part Names and Functions
2
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.
●Loop detection/shutoff function and loop history function
If you wish to clear loop detection history, turn OFF once the power supply of the
Ethernet Switch and turn it ON again.
Then, loop detection history is deleted.
The Ethernet Switch can hold up to 64 loop history logs.
Boot
Status mode
(Base mode) GIGA mode DUPLEX
mode
Loop History
mode
Press "LED DISPLAY CHANGE BUTTON" manually.
Automatic
Automatically returns to Base mode after 1 minute.
Boot
ECO mode
(Base mode)
Status
mode
GIGA
mode
DUPLEX
mode
Loop history
mode
※The Base mode is maintained even after the power is turned OFF.
LED lamps for each mode and LED lamps for ports 1 to 20 correspond as shown in Table 1 (see page 14).
Turns on the port LED with a orange light when a loop occurs in the corresponding port.
The Loop shutoff mode has the following 2 types of modes.
- Block mode (factory default)
When loops are detected, the port statuses are automatically blocked, and just the specified
packets which include the loop detection packets will be transmitted and received.
- Shut-down mode
When loops are being detected, the ports will be automatically linked down, and none of
the packets will be transmitted and received.
*Just the loop detection packets from 30 seconds before the set restoration times will
automatically be transmitted and received.
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 details, see the PDF version of the Operating Instructions). The default
setting is ON.

CONSOLE
9600.N.8.1（DTE）
SFP▲（19）
SFP▼（20）
SFP▲（17）
SFP▼（18）
LED DISPLAY
CHANGE BUTTON
KEEP PRESSING 3SEC
ECO MODE ON/OFF
ECO MODE
ON･･･BLINK
OFF･･･LIGHT
LEFT LED（ORANGE）：LOOP DETECTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
GA-ML16TPoE+
POWER
PoE LIM.
TEMP
FAN
STATUS/ECO
GIGA
FULL
LOOP
HISTORY
17
18
19
20
17
Ports 1 to 16 support IEEE802.3at/af PoE. This function allows for power supply of up to 30 W through
each port and 250W in total through the Switching Hub.
PoE power supply function operation overview
2.2 PoE power supply function
Port LEDs (right) 1 to 16
Green Light: Supplying power normally.
Orange Blink: Overload caused by a single port. (Requested power is exceeding 30 W. *1) or
total power supplied by the Switching Hub.
Off: Not supplying power or no PoE-powered device connected.
PoE LIM. LED (PoE limit)
For silent fan control high-speed (High)* For factory default, or low-speed (Low2)
Off: Supplying power in the range from 0 to 235 W.
Green Light: Supplying power in the range from 235 to 250 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 250 W.
For silent fan control low-speed (Low1), or min-speed (Min)
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.
*1 When configured IEEE802.3at (factory default). Exceeds 15.4 W when configured IEEE802.3af.
When the requested power supply for the Switching Hub is exceeded and it gets overloaded, the
power supply to the low priority ports is stopped, and the port LEDs (right) of the ports whose power
supply have been stopped blink orange.
The priority settings for the power supply can be set and changed from the console, etc.
Power supply while the PoE LIM. LED is blinking orange
(overload caused by the total power supplied by the Switching Hub)
When the power supply which is requested exceeds 30 W via a single port and the port LED (right)
blinks orange, and the power supply is stopped.
Unplug the port cable which is blinking orange, and check the PoE receiving equipment’s specifications.
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 do not 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.
(If the requested power supply for the device overall is exceeded, then the 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
* For the configuration and management method, please see the PDF version
Operating Instructions on Panasonic’s website.

Installation and Configuration
18
3
3.1 Grounding Cable Connection
The chassis of the equipment must be grounded properly so that the lightning can flow to
the ground, which improves the capability of the chassis for resisting the electromagnetic
interference.
1. Ensure that the grounding cable is connected correctly so that the equipment is
protected against lightning and interference. The correct connection of the grounding
cable is an important measure to ensure the human safety.
2. Connect the chassis to the ground by using a grounding cable. The grounding resistance
must be smaller than 0.10 ohms and the gauge of the grounding cable must be no less
than 18 AWG and the length is 50 cm.
3. The ground installed screw shall comply with 3.5mm minimum in nominal thread
diameter, and engage at least two complete threads into metal chassis with appropriate
fixing hardware like washer.
4. The grounding cable shall not be removed during normal operation, servicing or
maintenance.
5. Installation steps:
Step 1: Ensure the detachable power supply cord is removed.
Step 2: Use the screwdriver to turn the screws on the earth ground screw point.
Step 3: Strip one end of the ground wire to the ground hole of system.
Step 4: Connect the other end of the ground wire to a suitable grounding point of
building at your side.
Figure shows the grounding points.
Back panelBack panel
AC100-240V
Green/Yellow
Ground cable
1. 18 AWG min.
2. 50 cm
Grounding point
Building
Mains Power
Switch
earth
terminal

19
3.2 Mounting to rack
Take out the provided mount brackets (2pcs.) and eight screws (for fixing the mount
brackets and the Ethernet Switch).Fix the mount brackets to the four holes on each side of
the Ethernet Switch using the screws.
Then,securely install the Ethernet Switch on the rack using the four provided screws (for
mounting on a 19-inch rack) or screws provided with the rack.

Installation and Configuration
3.3 Mounting on a wall
20
3
Use the two wall mount brackets and the eight screws (for the wall mount brackets and for
connecting the main unit) which are included in the separately sold mount brackets
PN71053, and connect the four holes on the sides of the Ethernet Switch to the four holes on
the mount brackets. Then firmly fasten the Ethernet Switch to the wall with the four screws
which the customer has prepared.