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Hardware Overview
11
AC1900, N900, and N450 WiFi
Cable Data Gateways
Back Panel of the AC1900 WiFi Cable Data Gateway
The back panel contains ports, connectors, and a recessed button.
l
Power adapter input
Ethernet LAN ports
Coaxial cable connector
Reset button
USB port
Figure 2. Back panel connections and button of the AC1900
The back panel includes the following components, viewed from top to bottom:
Recessed Reset button
.
To set the gateway to the original factory settings, press and
hold the
Reset
button for at least seven seconds. For more information, see
Return the
WiFi Cable Data Gateway to Its Factory Default Settings
on page
94.
Four 10/100/1000 Mbps Ethernet LAN ports
. Use these ports to connect local computers
to the Ethernet LAN of the cable data gateway.
USB port
. The USB 2.0 port lets you connect a USB hard drive or flash drive to the cable
data gateway.
Coaxial cable connector
. Attach a coaxial cable to the cable service provider’s
connection.
Power input connector
. Attach the power adapter cable to this input.
Page 12 / 168
Hardware Overview
12
AC1900, N900, and N450 WiFi
Cable Data Gateways
Product Label of the AC1900 WiFi Cable Data Gateway
The label on side panel of the cable data gateway shows the login information, MAC address,
serial number, WiFi network names, and WiFi password (key).
MAC address
Serial number
Preset WiFi password
2.4 GHZ preset WiFi SSID
5 GHz preset WiFi SSID
Figure 3. Product label of the AC1900
Hardware Features of the N900 WiFi Cable Data Gateway
This section describes the physical aspects of the N900 WiFi Cable Data Gateway, Model
CG4500BD. This model provides radios for both the 2.4 GHz and 5 Ghz band and can
support WiFi throughput of up to 900 Mbps.
Front Panel of the N900 WiFi Cable Data Gateway
The front panel contains control buttons and status LEDs. Use the LEDs to verify status and
connections.
Note:
For optimal performance, keep the cable data gateway vertical in the
stand and do not detach the stand. Do not mount this unit to a wall; it
is not suitable for wall mounting.
Page 13 / 168
WPS LED
5 Ghz WiFi LED
Power LED
Downstream LED
Upstream LED
Internet LED
LAN Ethernet LEDs
Nonfunctional button
2.4 GHz WiFi LED
WPS button
Hardware Overview
13
AC1900, N900, and N450 WiFi
Cable Data Gateways
Figure 4. Front panel buttons and LEDs of the N900
You can use the LEDs to verify status and connections. The following table lists and
describes each LED and the WPS button on the front panel.
Table 2.
LEDs and front panel buttons of the N900
LED
Icon
Description
WPS button
and LED
Press the
WPS
button to open a two-minute window for the cable data gateway to
connect with other WPS-enabled devices.
The WPS LED blinks green during this two-minute period. For more information
about using the WPS method to implement WiFi security, see the following sections:
Join the WiFi Network of the WiFi Cable Data Gateway
on page
26
Use the WPS Wizard to Add a Device to the WiFi Network
on page
52
2.4 GHz WiFi
Solid green
. The 2.4 GHz WiFi radio is functioning and available for use.
Blinking
. The 2.4 GHz WiFi radio is processing traffic.
Off
. The 2.4 GHz WiFi radio is disabled. (If the radio is disabled, see
Control the
WiFi Radios
on page
109.)
Page 14 / 168
Hardware Overview
14
AC1900, N900, and N450 WiFi
Cable Data Gateways
5 GHz WiFi
Solid green
. The 5 GHz WiFi radio is functioning and available for use.
Blinking
. The 5 GHz WiFi radio is processing traffic.
Off
. The 5 GHz WiFi radio is disabled. (If the radio is disabled, see
Control the
WiFi Radios
on page
109.)
Power
Solid green
. The gateway is receiving power.
Blinking green
. The gateway is powering on.
Blinking red
. The cable data gateway is performing a self-test or the thermal
cutoff circuit was triggered.
Off
. The cable data gateway is not receiving power.
Note:
If the Power LED lights red or blinks red at any other time than while booting,
see
Troubleshoot with the LEDs
on page
155.
Downstream
Solid blue
. More than one downstream channel is locked.
Solid green
. One downstream channel is locked (channel bonding does not
occur).
Blinking green
. The cable data gateway is scanning for a downstream channel.
Off
. No downstream channel is locked.
Upstream
Solid blue
. More than one upstream channel is locked.
Solid green
. One upstream channel is locked (channel bonding does not
occur).
Blinking green
. The cable data gateway is scanning for an upstream channel.
Off
. No upstream channel is locked.
Internet
Solid green
. The cable data gateway is connected to the Internet.
Slow blinking green
. The cable data gateway is receiving DHCP information
from the cable provider’s cable modem termination system (CMTS).
Fast blinking green
. The cable data gateway is downloading a configuration file
from the cable provider’s CMTS.
Off
. The cable data gateway is not connected to the Internet.
LAN
The type of Ethernet connection determines the LED color:
A green LED indicates a 1,000 Mbps connection.
An amber LED indicates a 100/10 Mbps connection.
The LED functions are as follows:
Solid green or amber
. The Ethernet port is connected to a powered-on device.
Blinking green or amber
. Data is being transmitted or received on the Ethernet
port.
Off
. The Ethernet port does not detect a powered-on device.
Table 2.
LEDs and front panel buttons of the N900 (continued)
LED
Icon
Description
Page 15 / 168
Hardware Overview
15
AC1900, N900, and N450 WiFi
Cable Data Gateways
Back Panel of the N900 WiFi Cable Data Gateway
LAN ports
Coaxial cable connector
USB port
Power adapter input
Reset button
The back panel contains ports, connectors, and a recessed button.
Figure 5. Back panel connections and button of the N900
The back panel includes the following components, viewed from top to bottom:
Four 10/100/1000 Mbps Ethernet LAN ports
. Use these ports to connect local computers
to the Ethernet LAN of the cable data gateway.
USB port
. The USB 2.0 port lets you connect a USB hard drive or flash drive to the cable
data gateway.
Recessed Reset button
.
To set the gateway to the original factory settings, press and
hold the
Reset
button for at least seven seconds. For more information, see
Return the
WiFi Cable Data Gateway to Its Factory Default Settings
on page
94.
Coaxial cable connector
. Attach a coaxial cable to the cable service provider’s
connection.
Power input connector
. Attach the power adapter cable to this input.

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