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1.
Hardware Setup
This chapter covers the following topics:
Unpack Your Modem Router
Front Panel
Rear Panel
Position Your Gateway
Cable Your Modem Router
For more information about the topics covered in this manual, visit the support website at
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Hardware Setup
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N600 WiFi Cable Modem Router Model C3700
Unpack Your Modem Router
Your package contains the following items.
Ethernet cable
Power adapter
Modem router
Figure 1. Package contents
Front Panel
The modem router has status LEDs and buttons on the front.
Power LED
Downstream LED
Upstream LED
Internet LED
WPS button / LED
WiFi On/Off button
5 GHz LED
2.4 GHz LED
Ethernet LED
USB LED
Figure 2. Modem router front view
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Hardware Setup
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N600 WiFi Cable Modem Router Model C3700
You can use the LEDs to verify status and connections. The following table lists and
describes each LED and button on the front panel of the modem router.
Table 1.
LED and button descriptions
LED
Description
WPS button with
LED
This button lets you use WPS to join the WiFi network without typing the WiFi password.
The WPS LED blinks during this process and then lights solid.
WiFi On/Off
button with LED
Pressing this button for two seconds turns the WiFi radios in the modem router on and off. If
this LED is lit, the WiFi radios are on. If this LED is off, the WiFi radios are turned off and
you cannot use WiFi to connect to the modem router.
Power
Green
. Power is supplied to the modem router.
Off
. No power is supplied to the modem router.
Downstream
Solid green
. One or more downstream channels are locked.
Blinking green
. The unit is scanning for a downstream channel.
Off
. No downstream channel is locked.
Upstream
Solid green
. One or more upstream channels are locked.
Blinking green
. The unit is scanning for an upstream channel.
Off
. No upstream channel is locked.
Internet
Solid green
. The modem router is online.
Blinking green
. The modem router is synchronizing with the cable provider’s cable
modem termination system (CMTS).
Off
. The modem router is offline.
2.4 GHz radio
Green
. The 2.4 GHz radio is on.
Off
. The 2.4 GHz radio is off.
5 GHz radio
Green
. The 5 GHz radio is on.
Off
. The 5 GHz radio is off.
Ethernet
Green
. A device is connected to an Ethernet port and powered on.
Off
. No device is connected to an Ethernet port.
USB
Green
. A USB device is connected to the port on the back panel.
Off
. No USB device is connected to the port on the back panel.
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Hardware Setup
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N600 WiFi Cable Modem Router Model C3700
Rear Panel
The rear panel has the connections and buttons shown the following figure.
Power adapter input
Ethernet LAN ports
Coaxial cable connector
Power On/Off button
USB port (optional)
Figure 3. Modem router rear panel
Position Your Gateway
The modem router lets you access your network anywhere within the operating range of your
wireless network. However, the operating distance or range of your wireless connection can
vary significantly depending on the physical placement of your modem router. For example,
the thickness and number of walls the wireless signal passes through can limit the range.
Additionally, other wireless access points in and around your home might affect your modem
router’s signal. Wireless access points are modem routers, repeaters, WiFi range extenders,
or any other device that emits a wireless signal for network access.
Position your modem router according to the following guidelines:
Place your modem router near the center of the area where your computers and other
devices operate, and within line of sight to your wireless devices.
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Hardware Setup
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N600 WiFi Cable Modem Router Model C3700
Make sure that the modem router is within reach of an AC power outlet and near Ethernet
cables for wired computers.
Place the modem router in an elevated location, minimizing the number walls and ceilings
between the modem router and your other devices.
Place the modem router away from electrical devices such as these:
-
Ceiling fans
-
Home security systems
-
Microwaves
-
Computers
-
Base of a cordless phone
-
2.4 GHz cordless phone
Place the modem router away from large metal surfaces, large glass surfaces, and
insulated walls such as these:
-
Solid metal door
-
Aluminum studs
-
Fish tanks
-
Mirrors
-
Brick
-
Concrete
(Optional) If you have adjacent access points, use different radio frequency channels to
reduce interference.
Cable Your Modem Router
The most common way to cable your modem router is the simplest, without any other routers
or gateways on the same network. You can also cable the modem router to another router or
gateway and log in to the modem router to specify this setting.

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