Allied Telesis x330-52GTX User manual

613-002997 Rev. B
x330 Series
Fanless Gigabit Layer 3 Access Switches
x330-10GTX
x330-20GTX
x330-28GTX
x330-52GTX
Installation Guide for Virtual Chassis
Stacking

Copyright  2023 Allied Telesis, Inc.
All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesis, Inc.
Allied Telesis, VCStack, and the Allied Telesis logo are trademarks of Allied Telesis, Incorporated. All other product names, company
names, logos or other designations mentioned herein are trademarks or registered trademarks of their respective owners.
Allied Telesis, Inc. reserves the right to make changes in specifications and other information contained in this document without prior
written notice. The information provided herein is subject to change without notice. In no event shall Allied Telesis, Inc. be liable for
any incidental, special, indirect, or consequential damages whatsoever, including but not limited to lost profits, arising out of or related
to this manual or the information contained herein, even if Allied Telesis, Inc. has been advised of, known, or should have known, the
possibility of such damages.

3
Electrical Safety and Emissions Standards
This product meets the following standards.
Warning
In a domestic environment this product may cause radio interference in which case the user
may be required to take adequate measures.  E84
Electrical Safety: EN 62368-1 (UL/EN/IEC)
Table 1 lists the product certificates.
U.S. Federal Communications Commission
Radiated Energy
Note: This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15
of FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with this instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case
the user will be required to correct the interference at his own expense.
Note: Modifications or changes not expressly approved of by the manufacturer or the FCC, can void your right to operate
this equipment.
Industry Canada
This Class A digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.
Table 1. Product Certifications
Additional Certificates CISPR Class A
(Comité International Spécial des Perturbations
Radioélectriques)
RoHS Compliant
Australia/New Zealand RCM
(Regulatory Compliance Mark)
Common Criteria NIAP
(National Information Assurance Partnership)
Laser Safety EN 60825-1

4
European Economic Area (EEA) CE
(Conformité Européenne)
WEEE
(Waste Electrical and Electronic Equipment)
RoHS (EU 1025/863)
(Restriction of Hazardous Substances)
European Standards (EN) EMC (Immunity): EN 55024, EN 55035
Laser Safety: EN 60825-1
EN 55032 Class A, EN 61000-3-2, EN 61000-3-3
India TEC
(Telecommunications Engineering Center)
Japan VCCI Class A
(Voluntary Control Council for Interference)
Mexico NOM
(Normas Oficiales Mexicanas)
North America FCC Class A
Laser Safety: EN 60825-1
CULUS
Energy Star
United Kingdom UKCA
(UK Conformity Assessment)
Table 1. Product Certifications (Continued)

5
Translated Safety Statements
Important: Safety statements with the  symbol are translated into multiple languages in
Translated Safety Statements at alliedtelesis.com/library/search.
Übersetzte Sicherheitshinweise
Wichtig: Sicherheitshinweise mit dem -Symbol werden in Translated Safety Statements bei
alliedtelesis.com/library/search in mehrere Sprachen übersetzt.
Declaraciones de seguridad traducidas
Importante: Las declaraciones de seguridad con el símbolo  se traducen a varios idiomas en
Translated Safety Statements en alliedtelesis.com/library/search.
Consignes de sécurité traduites
Important: Les déclarations de sécurité avec le symbole  sont traduites en plusieurs langues en
Translated Safety Statements sur alliedtelesis.com/library/search.
Dichiarazioni di sicurezza tradotte
Importante: Le dichiarazioni di sicurezza con il simbolo  sono tradotte in più lingue in Translated
Safety Statements su alliedtelesis.com/us/en/library/search.
Översatta säkerhetsförklaringar
Viktig: Säkerhetsföreskrifter med -symbolen översätts till flera språk på Translated Safety
Statements vid alliedtelesis.com/library/search.

6

7
Preface ...............................................................................................................................................................................15
Document Conventions .......................................................................................................................................................16
Contacting Allied Telesis .....................................................................................................................................................17
Chapter 1: Overview ........................................................................................................................................................ 19
Front and Back Panels ........................................................................................................................................................20
Features ..............................................................................................................................................................................23
10/100/1000Mbps Copper Ports ..................................................................................................................................23
1/2.5/5/10Gbps Multi-Gigabit Copper Ports..................................................................................................................23
1/10Gbps SFP+ Ports ..................................................................................................................................................23
Port and System LEDs .................................................................................................................................................24
Installation Options.......................................................................................................................................................24
MAC Address Table .....................................................................................................................................................24
Management Software and Interfaces .........................................................................................................................25
Energy Savings ............................................................................................................................................................25
10/100/1000Mbps Copper Ports..........................................................................................................................................26
1/2.5/5/10Gbps Multi-Gigabit Copper Ports.........................................................................................................................28
SFP+ Ports ..........................................................................................................................................................................30
Port LEDs ............................................................................................................................................................................31
10/100/1000Mbps Copper Port LEDs ..........................................................................................................................31
1/2.5/5/10Gbps Multi-Gigabit Copper Port LEDs..........................................................................................................33
1/10Gbps SFP+ Port LEDs ..........................................................................................................................................34
eco-friendly Button...............................................................................................................................................................36
Switch ID LED .....................................................................................................................................................................37
USB Port..............................................................................................................................................................................39
Console Port........................................................................................................................................................................40
Power Supply and Power Savings Features .......................................................................................................................41
Chapter 2: Virtual Chassis Stacking .............................................................................................................................. 43
Overview..............................................................................................................................................................................44
Stacking Guidelines.............................................................................................................................................................45
Stack Trunks........................................................................................................................................................................46
SFP+ Ports S1 and S2 .................................................................................................................................................46
Multi-Gigabit Copper Ports ...........................................................................................................................................49
Unsupported Trunks.....................................................................................................................................................51
Master and Member Switches .............................................................................................................................................54
Switch ID Numbers..............................................................................................................................................................55
Feature Licenses .................................................................................................................................................................56
Planning the Stack...............................................................................................................................................................57
Specifying Ports in the Command Line Interface.................................................................................................................58
VCStack Worksheet ............................................................................................................................................................60
Chapter 3: Beginning the Installation ............................................................................................................................ 65
Reviewing Safety Precautions.............................................................................................................................................66
Choosing a Site for the Switch ............................................................................................................................................70
Site Requirements........................................................................................................................................................70
Enclosure Requirements ..............................................................................................................................................71
Unpacking the Switch ..........................................................................................................................................................72
Installation Options ..............................................................................................................................................................75
x330-20GTX Switch .....................................................................................................................................................75
x330-28GTX Switch .....................................................................................................................................................76
Contents

Contents
8
x330-52GTX Switch..................................................................................................................................................... 77
Hardware Options............................................................................................................................................................... 78
RKMT-J13 Equipment Rack Brackets Kit.................................................................................................................... 78
BRKT-J24 Wall Brackets Kit........................................................................................................................................ 79
Recording the Serial Number and MAC Address ............................................................................................................... 80
Installing the Switch on a Table .......................................................................................................................................... 81
Chapter 4: Installing the x330-20GTX Switch in an Equipment Rack ......................................................................... 85
Introduction ......................................................................................................................................................................... 86
Installing the x330-20GTX Switch....................................................................................................................................... 87
Chapter 5: Installing the x330-28GTX Switch in an Equipment Rack ......................................................................... 91
Introduction ......................................................................................................................................................................... 92
Installing the x330-28GTX Switch....................................................................................................................................... 93
Chapter 6: Installing the x330-52GTX Switch in an Equipment Rack ......................................................................... 95
Introduction ......................................................................................................................................................................... 96
Installing the x330-52GTX Switch....................................................................................................................................... 97
Chapter 7: Installing x330-20GTX, x330-28GTX, and x330-52GTX Switches on a Wall ............................................. 99
Installation Guidelines....................................................................................................................................................... 100
Plywood Base for a Wall with Wooden Studs................................................................................................................... 103
Installing the Switch .......................................................................................................................................................... 105
Chapter 8: Displaying the Hardware Status and AlliedWare Plus Version Number ................................................ 109
Powering On the Switch.................................................................................................................................................... 110
Starting a Local Management Session ............................................................................................................................. 112
Displaying the Hardware Status and AlliedWare Plus Version Number ........................................................................... 115
Chapter 9: Building Stacks with SFP+ Ports S1 and S2 ............................................................................................ 117
Introduction ....................................................................................................................................................................... 118
Powering On the Switches Sequentially ........................................................................................................................... 119
Powering On the Switches Simultaneously ...................................................................................................................... 121
Verifying the Stack and Assigning Priority Numbers......................................................................................................... 123
Chapter 10: Building Stacks with Multi-Gigabit Copper Ports .................................................................................. 127
Introduction ....................................................................................................................................................................... 128
Command Summary......................................................................................................................................................... 129
STACK ENABLE Command...................................................................................................................................... 129
STACKPORT Command ........................................................................................................................................... 129
STACK PRIORITY Command ................................................................................................................................... 130
STACK RENUMBER Command................................................................................................................................ 131
SWITCH PROVISION Command.............................................................................................................................. 132
Configuring the Master Switch.......................................................................................................................................... 133
General Steps for the Master Switch......................................................................................................................... 133
Configuring the Master Switch - Part I....................................................................................................................... 134
Configuring the Master Switch - Part II...................................................................................................................... 136
Verifying the Master Switch ....................................................................................................................................... 138
What to Do Next ........................................................................................................................................................ 140
Configuring Member Switches.......................................................................................................................................... 141
General Steps for Member Switches......................................................................................................................... 141
Configuring Member Switches - Part I....................................................................................................................... 142
Configuring Member Switches - Part II...................................................................................................................... 143
Verifying Member Switches ....................................................................................................................................... 145
What to Do Next for Member Switches...................................................................................................................... 147
Powering On the Stack ..................................................................................................................................................... 148
Chapter 11: Cabling Copper and SFP+ Ports .............................................................................................................. 149
Cabling Copper Ports........................................................................................................................................................ 150
Guidelines to Handling SFP and SFP+ Transceivers ....................................................................................................... 151
Installing 1Gbps SFP and 10Gbps SFP+ Transceivers.................................................................................................... 152
Installing AT-SP10TW Direct Connect Twinax Cables in SFP+ Ports.............................................................................. 155

x330 Series Installation Guide fo Virtual Chassis Stacking
9
Chapter 12: Troubleshooting ........................................................................................................................................ 157
Appendix A: Technical Specifications ......................................................................................................................... 161
Physical Specifications ......................................................................................................................................................162
Environmental Specifications.............................................................................................................................................166
Power Specifications .........................................................................................................................................................167
Certifications......................................................................................................................................................................169
RJ-45 Copper Port Pinouts................................................................................................................................................171
RJ-45 Style Serial Console Port Pinouts ...........................................................................................................................172

Contents
10

11
Figure 1: Front Panel of the x330-10GTX Switch.................................................................................................................20
Figure 2: Front Panel of the x330-20GTX Switch.................................................................................................................20
Figure 3: Front Panel of the x330-28GTX Switch.................................................................................................................21
Figure 4: Front Panel of the x330-52GTX Switch.................................................................................................................21
Figure 5: Back Panels ..........................................................................................................................................................22
Figure 6: Speed/Activity and Duplex Mode LEDs for the 10/100/1000Mbps Copper Ports..................................................31
Figure 7: Speed/Activity LEDs for the 1/2.5/5/10Gbps Multi-Gigabit Copper Ports..............................................................33
Figure 8: Speed/Activity LEDs for the 1/10Gbps SFP+ Ports...............................................................................................34
Figure 9: Switch ID LED .......................................................................................................................................................37
Figure 10: Switch ID LED with eco-friendly Mode Off (Port LEDs On).................................................................................37
Figure 11: Switch ID LED with eco-friendly Mode On (Port LEDs Off).................................................................................38
Figure 12: Stack Trunks of SFP+ Ports S1 and S2 for Two Switches..................................................................................47
Figure 13: Stack Trunks of SFP+ Ports S1 and S2 for Three Switches ...............................................................................47
Figure 14: Stack Trunks of SFP+ Ports S1 and S2 for Four Switches .................................................................................48
Figure 15: Mixed Stack of x330 Switches.............................................................................................................................48
Figure 16: Chain Stack Trunk of SFP+ Ports S1 and S2......................................................................................................49
Figure 17: Stack Trunks of Multi-Gigabit Copper Ports for Two Switches............................................................................49
Figure 18: Stack Trunks of Multi-Gigabit Copper Ports for Three Switches .........................................................................50
Figure 19: Stack Trunks of Multi-Gigabit Copper Ports for Four Switches ...........................................................................50
Figure 20: Chain Stack Trunk of Multi-Gigabit Copper Ports................................................................................................51
Figure 21: Unsupported Trunk of Multi-Gigabit Copper Ports and SFP+ Ports S1 and S2 ..................................................51
Figure 22: Unsupported Trunk of SFP+ Ports S1 and S2 with Mixed Cables ......................................................................52
Figure 23: Unsupported Trunk with a Network Device Between Trunk Ports.......................................................................53
Figure 24: PORT Parameter in the Command Line Interface...............................................................................................58
Figure 25: Accessory Items Included with the x330-20GTX Switch .....................................................................................72
Figure 26: Accessory Items Included with the x330-28GTX Switch .....................................................................................73
Figure 27: Accessory Items Included with the x330-52GTX Switch .....................................................................................74
Figure 28: Installation Options for the x330-20GTX Switch..................................................................................................75
Figure 29: Installation Options for the x330-28GTX Switch..................................................................................................76
Figure 30: Installation Options for the x330-52GTX Switch..................................................................................................77
Figure 31: RKMT-J13 Equipment Rack Brackets Kit for the x330-20GTX Switch................................................................78
Figure 32: BRKT-J24 Wall Brackets Kit for the x330-20GTX and x330-28GTX Switches ...................................................79
Figure 33: Serial Number and MAC Address Labels............................................................................................................80
Figure 34: Switch Installation on a Table..............................................................................................................................81
Figure 35: Unsupported Table Installations..........................................................................................................................81
Figure 36: Attaching the Bumper Feet..................................................................................................................................82
Figure 37: Attaching Bumper Feet on the x330-52GTX Switch............................................................................................83
Figure 38: x330-20GTX Switch with RKMT-J13 Equipment Rack Brackets Kit ...................................................................86
Figure 39: Attaching the Handles to the RKMT-J13 Brackets ..............................................................................................87
Figure 40: Attaching the Extenders to the RKMT-J13 Brackets ...........................................................................................88
Figure 41: Attaching the RKMT-J13 Brackets to the x330-20GTX Switch ...........................................................................88
Figure 42: Securing the x330-20GTX Switch in a Standard 19-inch Equipment Rack.........................................................89
Figure 43: x330-28GTX Switch Installed in a Standard 19-inch Equipment Rack................................................................92
Figure 44: Attaching the Equipment Rack Brackets to the x330-28GTX Switch ..................................................................93
Figure 45: Securing the x330-28GTX Switch in a Standard 19-inch Equipment Rack.........................................................94
Figure 46: Bracket Screw Holes on the x330-52GTX Switch ...............................................................................................96
Figure 47: Equipment Rack Bracket Positions for the x330-52GTX Switch .........................................................................96
Figure 48: Attaching the Equipment Rack Brackets to the x330-52GTX Switch ..................................................................97
Figure 49: Securing the x330-52GTX Switch in a Standard 19-inch Equipment Rack.........................................................98
Figures

Figures
12
Figure 50: x330-20GTX and x330-28GTX Switches on a Wall...........................................................................................100
Figure 51: x330-52GTX Switch on a Wall...........................................................................................................................100
Figure 52: Unsupported Wall Installation for the x330-20GTX, x330-28GTX, and x330-52GTX Switches ........................101
Figure 53: x330 Switch on a Wall with a Plywood Base .....................................................................................................103
Figure 54: Steps to Installing x330 Switches on a Plywood Base ......................................................................................104
Figure 55: Attaching the AT-BRKT-J24 Wall Brackets to x330-20GTX and x330-28GTX Switches ..................................106
Figure 56: Attaching the Wall/Equipment Rack Brackets to the x330-52GTX Switch ........................................................106
Figure 57: Attaching the Wall/Equipment Rack Brackets to the x330-52GTX Switch (continued) .....................................107
Figure 58: Marking the Locations of the Bracket Holes ......................................................................................................108
Figure 59: Installing the Power Cord Retaining Clip ...........................................................................................................110
Figure 60: Connecting the AC Power Cord.........................................................................................................................110
Figure 61: Lowering the Power Cord Retaining Clip...........................................................................................................111
Figure 62: Connecting the Power Cord to an AC Power Outlet..........................................................................................111
Figure 63: Management Cable Included with Switch..........................................................................................................112
Figure 64: VT-Kit3 Management Cable ..............................................................................................................................112
Figure 65: Local Management Sessions with the VT-Kit3 Management Cable..................................................................113
Figure 66: Disconnecting the Power Cord from the AC Power Source ..............................................................................115
Figure 67: SHOW STACK Command.................................................................................................................................123
Figure 68: Moving to the Global Configuration Mode with the ENABLE and CONFIGURE TERMINAL Commands.........124
Figure 69: Returning to the Privileged Exec Mode .............................................................................................................125
Figure 70: Saving the Priority Values with the WRITE Command......................................................................................125
Figure 71: SHOW STACK Command with New Switch Priority Values..............................................................................125
Figure 72: SHOW STACK Command on the Master Switch ..............................................................................................138
Figure 73: SHOW RUNNING-CONFIG INTERFACE Command on the Master Switch.....................................................139
Figure 74: Powering Off the Switch ....................................................................................................................................140
Figure 75: SHOW STACK Command for a Member Switch...............................................................................................145
Figure 76: SHOW RUNNING-CONFIG INTERFACE Command for Member Switches.....................................................146
Figure 77: Installing an SFP+ Transceiver..........................................................................................................................152
Figure 78: Removing the Dust Cover from an SFP+ Transceiver ......................................................................................153
Figure 79: Positioning the SFP+ Handle in the Upright Position ........................................................................................153
Figure 80: Connecting a Fiber Optic Cable to an SFP or SFP+ Transceiver .....................................................................154
Figure 81: Installing an AT-SP10TW Cable........................................................................................................................155
Figure 82: Dimensions of the x330-10GTX Switch.............................................................................................................162
Figure 83: Dimensions of x330-20GTX and x330-28GTX Switches...................................................................................163
Figure 84: Dimensions of the x330-52GTX Switch.............................................................................................................163
Figure 85: Bracket Screw Holes on the x330-20GTX and x330-28GTX Switches .............................................................164
Figure 86: Bracket Screw Holes on the x330-52GTX Switch .............................................................................................165
Figure 87: Pin Layout for the RJ-45 Copper Ports (Front View) .........................................................................................171

13
Tables
Table 1: Product Certifications ...............................................................................................................................................3
Table 2: Specifications of the 10/100/1000Mbps Copper Ports ...........................................................................................26
Table 3: Specifications of the 1/2.5/5/10Gbps Multi-Gigabit Copper Ports ..........................................................................28
Table 4: Speed/Activity LEDs for the 10/100/1000Mbps Copper Ports ...............................................................................31
Table 5: Duplex Mode LEDs for the 10/100/1000Mbps Copper Ports .................................................................................32
Table 6: Speed/Activity LEDs for the 1/2.5/5/10Gbps Multi-Gigabit Copper Ports ..............................................................33
Table 7: Speed/Activity LEDs for the 1/10Gbps SFP+ Ports ...............................................................................................35
Table 8: PORT Parameter Format .......................................................................................................................................58
Table 9: VCStack Worksheet ...............................................................................................................................................60
Table 10: Stacking Worksheet Columns ..............................................................................................................................60
Table 11: Stack Worksheet Example with SFP+ Ports as Stack Trunk ...............................................................................62
Table 12: Stack Worksheet Example with Multi-Gigabit Copper Ports as Stack Trunk .......................................................63
Table 13: Configuring the Master Switch for a Stack Trunk of Multi-Gigabit Copper Ports - Part I ...................................134
Table 14: Configuring the Master Switch for a Stack Trunk of Multi-Gigabit Copper Ports - Part II ..................................136
Table 15: Configuring Member Switches - Part I ...............................................................................................................142
Table 16: Configuring Member Switches - Part II ..............................................................................................................143
Table 17: Product Dimensions (H x W x D) .......................................................................................................................162
Table 18: Switch Weights ..................................................................................................................................................164
Table 19: Ventilation Requirements ...................................................................................................................................164
Table 20: Environmental Specifications .............................................................................................................................166
Table 21: Maximum Power Consumption ..........................................................................................................................167
Table 22: Input Voltages ....................................................................................................................................................167
Table 23: Heat Dissipation ................................................................................................................................................168
Table 24: Product Certifications .........................................................................................................................................169
Table 25: Pin Signals for Copper Ports .............................................................................................................................171
Table 26: RJ-45 Style Serial Console Port Pin Signals .....................................................................................................172

Tables
14

15
Preface
This guide contains the hardware installation instructions for the x330
Series of Gigabit Layer 3 Access Switches. The instructions explain how to
install the x330-20GTX, x330-28GTX, and x330-52GTX Switches in virtual
stacks with Virtual Chassis Stacking (VCStack™). VCStack lets you
manage multiple switches as a single unit and add redundancy to your
network topology by distributing functions across multiple devices. This
preface contains the following sections:
“Document Conventions” on page 16
“Contacting Allied Telesis” on page 17
Note
The x330-10GTX Switch does not support the VCStack feature, but
it is described in Chapter 1, “Overview” on page 19.
For instructions on how to install x330 Switches as standalone units, refer
to the x330 Series Installation Guide for Standalone Switches.

Preface
16
Document Conventions
This document uses the following conventions:
Note
Notes provide additional information.
Caution
Cautions inform you that performing or omitting a specific action
may result in equipment damage or loss of data.
Warning
Warnings inform you that performing or omitting a specific action
may result in bodily injury.

x330 Series Installation Guide for Virtual Chassis Stacking
17
Contacting Allied Telesis
For assistance with this product, you may contact Allied Telesis technical
support on the Services & Support section of the Allied Telesis web site at
www.alliedtelesis.com/us/en/services-support. The page has links to
the following services:
Helpdesk (Support Portal) - Log onto Allied Telesis interactive
support center to search for answers to your questions in our
knowledge database, check support tickets, learn about Return
Merchandise Authorizations (RMAs), and contact Allied Telesis
technical experts.
Software Downloads - Download the latest software releases for
your product.
Licensing - Register and obtain your License key to activate your
product.
Product Documents - View the most recent installation guides, user
guides, software release notes, white papers and data sheets for
your product.
Warranty - View a list of products to see if Allied Telesis warranty
applies to the product you purchased and register your warranty.
Allied Telesis Helpdesk - Contact a support representative.

Preface
18

19
Chapter 1
Overview
This chapter contains the following sections:
“Front and Back Panels” on page 20
“Features” on page 23
“10/100/1000Mbps Copper Ports” on page 26
“1/2.5/5/10Gbps Multi-Gigabit Copper Ports” on page 28
“SFP+ Ports” on page 30
“Port LEDs” on page 31
“eco-friendly Button” on page 36
“Switch ID LED” on page 37
“USB Port” on page 39
“Console Port” on page 40
“Power Supply and Power Savings Features” on page 41
Note
The x330-10GTX Switch does not support the VCStack feature, but
it is included in the chapter. For installation instructions, refer to the
x330 Series Installation Guide for Standalone Switches.

Chapter 1: Overview
20
Front and Back Panels
Figure 1 shows the front panel of the x330-10GTX Switch.
Figure 1. Front Panel of the x330-10GTX Switch
Figure 2 shows the front panel of the x330-20GTX Switch.
Figure 2. Front Panel of the x330-20GTX Switch
A. Eight 10/100/1000Mbps
Copper Ports
B. One 1/2.5/5/10Gbps
Multi-Gigabit Copper Port
C. One 1/10Gbps SFP+
Transceiver Port
D. One Local Management
Console Port
ABCDEF
E. One USB Flash Drive
Port
F. Switch ID LED
G. eco-friendly Button
G
A. Sixteen 10/100/1000Mbps
Copper Ports
B. Two 1/2.5/5/10Gbps
Multi-Gigabit Copper Ports
C. Two 1/10Gbps SFP+
Transceiver Ports
D. One USB Flash Drive Port
AB C
F
D
E. One Local Management
Console Port
F. Switch ID LED
G. eco-friendly Button
G
E