Ubiquiti ER-4 User Manual
4-Port Gigabit Router
with 1 SFP Port
Model: ER-4
Introduction
Thank you for purchasing the Ubiquiti Networks®
EdgeRouter™. This Quick Start Guide is designed to guide you
through installation and also includes warranty terms.
Package Contents
EdgeRouter ER-4
Wall Mount Screws
(Qty. 2)
Wall Mount Anchors
(Qty. 2)
4-Port Gigabit Router
with 1 SFP Port
Model: ER-4
Power Cord Quick Start Guide
TERMS OF USE: All Ethernet cabling runs must use CAT5 (or above). It is the professional
installer’s responsibility to follow local country regulations, including operation within legal
frequency channels, output power, indoor cabling requirements, and Dynamic Frequency
Selection (DFS) requirements.
Installation Requirements
• For indoor applications, use Category 5 (or above) UTP
cabling approved for indoor use.
• For outdoor applications, shielded Category 5 (or above)
cabling should be used for all wired Ethernet connections
and should be grounded through the AC ground of the
power supply.
We recommend that you protect your networks from
harmful outdoor environments and destructive ESD events
with industrial-grade, shielded Ethernet cable from Ubiquiti
Networks. For more details, visit:
www.ubnt.com/toughcable
WARNING: To reduce the risk of fire or electric shock,
do not expose the EdgeRouter to rain or moisture.
Note: Although the cabling can be located outdoors,
the EdgeRouter itself should be housed inside a
protective enclosure.
Hardware Overview
Front Panel Ports
Interface Description
Console
USB Reserved for future use.
RJ45
(eth0-eth2)
SFP
(eth3)
RJ45 serial console port for Command
Line Interface (CLI) management. Use an
RJ45-to-DB9, serial console cable, also
known as a rollover cable, to connect the
Console port to your computer. (If your
computer does not have a DB9 port,
then you will also need a DB9 adapter.)
Then configure the following settings as
needed:
• Baud rate 115200
• Data bits 8
• Parity NONE
• Stop bits 1
• Flow control NONE
RJ45 ports support 10/100/1000 Ethernet
connections.
SFP port is hot-swappable and supports
Gigabit fiber SFP modules.
Console
RJ45 (eth0-eth2)
USB
SFP (eth3)
Front Panel Button
Button Description
There are two methods to reset the
EdgeRouter to factory defaults:
• Runtime reset (recommended) The
Reset
• Power-on reset Disconnect the Power
Reset
EdgeRouter should be running after
bootup is complete. Press and hold the
Reset button for about 10seconds until
the LED for port eth3 starts flashing and
then becomes solidly lit. After a few
seconds, the LED will turn off, and the
EdgeRouter will automatically reboot.
Cord from the Power Adapter. Press and
hold the Reset button while connecting
the power (refer to Connecting Power for
details). Keep holding the button until
the LED for port eth3 starts flashing and
then stops flashing after a few seconds.
Front Panel LEDs
RJ45: Speed/Link/Act
System
SFP: Speed/Link/Act
LED State Status
Blue Bootup in Progress
System
White Ready for Use
Off No Link
Amber
Speed/
Amber Flashing
Link/Act
RJ45 (eth0-2)
Green
Green Flashing
Off No Link
Link/Act
Green
SFP (eth3)
Green Flashing Link Activity at 1Gbps
Link Established at
10/100Mbps
Link Activity at
10/100Mbps
Link Established at
1000Mbps
Link Activity at
1000Mbps
Link Established at
1Gbps
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