TP Link CR1900 User Manual

User Guide
AC1900 Wireless Dual Band DOCSIS 3.0
Cable Modem Router
CR1900
REV1.0.0 1910012033
Contents
About This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Chapter 1. Get to Know Your Modem Router . . . . . . . . . . . . . . . . . . . . . . . . .2
1. 2. 1. Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1. 2. 2. Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Chapter 2. Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Chapter 3. Log In to Your Modem Router . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Chapter 4. Congure Internet Connections. . . . . . . . . . . . . . . . . . . . . . . . 12
4. 3. 1. Bridge Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Chapter 5. Network Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Chapter 6. USB Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6. 1. 1. Access the USB Disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6. 1. 2. Customize Your Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6. 2. 1. Access the USB Disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6. 2. 2. Customize Your Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6. 3. 1. Access the USB Disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6. 3. 2. Customize Your Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Chapter 7. Parental Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Chapter 8. Guest Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Chapter 9. NAT Forwarding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9. 1. Share Local Resources in the Internet by Port Forwarding . . . . . . . . . . . . . . . . . . . 52
Chapter 10. Specify Your Network Settings. . . . . . . . . . . . . . . . . . . . . . . . . 56
10. 2. 1. Change the LAN IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
10. 2. 2. Use the Modem Router as a DHCP Server. . . . . . . . . . . . . . . . . . . . . . . . . . . 58
10. 3. 1. Specify Basic Wireless Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
10. 3. 2. Use WPS for Wireless Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
10. 3. 3. View Wireless Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
10. 3. 4. Advanced Wireless Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Chapter 11. Administrate Your Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
11. 1. 1. View System Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
11. 1. 2. View Device Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
11. 1. 3. View Connection Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Appendix: Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

About This Guide

This guide is a complement to Quick Installation Guide. The Quick Installation Guide instructs you on quick Internet setup, and this guide provides details of each function and shows you the way to configure these functions appropriate to your needs.
When using this guide, please notice that features of the router may vary slightly depending on the model and software version you have, and on your location, language, and Internet service provider. All screenshots, images, parameters and descriptions documented in this guide are used for demonstration only.
Conventions
In this guide, the following conventions are used:
Convention
Teal Underlined
Teal
>
Note:
Tips:
Symbols on
the web page
Description
Hyperlinks are in teal and underlined. You can click to redirect to a website or a specific section.
Contents to be emphasized and texts on the web page are in teal, including the menus, items, buttons, etc.
The menu structures to show the path to load the corresponding page. For example, Advanced > Wireless 2.4GHz > MAC Filtering Filtering function page is under the Wireless 2.4GHz menu that is located in the Advanced tab.
Ignoring this type of note might result in a malfunction or damage to the device.
Indicates important information that helps you make better use of your device.
click to edit the corresponding entry.
click to delete the corresponding entry.
click to enable or disable the corresponding entry.
means the MAC
More Info
• The latest software, management app and utility can be found at Download Center at
http://www.tp-link.com/support.
• The Quick Installation Guide (QIG) can be found where you find this guide or inside the package of the router.
• Specifications can be found on the product page at http://www.tp-link.com.
• A Technical Support Forum is provided for you to discuss our products at
http://forum.tp-link.com.
• Our Technical Support contact information can be found at the Contact Technical
Support page at http://www.tp-link.com/support.
1
Chapter 1

Get to Know Your Modem Router

This chapter introduces the modem router and shows its appearance.
This chapter contains the following sections:
Product Overview
Product Appearance
Chapter 1
Get to Know Your Modem Router

1. 1. Product Overview

TP-LINK’s Cable Modem Router is a combined wired/wireless network connection device with integrated wireless router and DOCSIS 3.0 modem, reducing hassle of configuration and saving space.
With Ethernet ports and antennas, the modem router provides wired and wireless access for multiple computers and mobile devices.
With various features and functions, the modem router is the perfect hub of your home or business network.

1. 2. Product Appearance

1. 2. 1. Front Panel

The front panel provides LEDs. You can check the modem router’s working status by following the LED Explanation table.
LED Status
On Power is on.
Power
Off
Power is off. Please ensure that the power adapter is connected correctly.
Indication
3
Chapter 1
Get to Know Your Modem Router
LED Status
Downstream
Upstream
Internet
Indication
Green
White The modem router has synchronized one channel.
Flashing The modem router is scanning for downstream channels.
Off
Green
White The modem router has synchronized one channel.
Flashing The modem router is synchronizing upstream channels.
Off
On The modem router is connected to the internet.
Off
Flashing The modem router is starting up..
The modem router has synchronized more than one channel.
The synchronization has not started or has failed. Please refer to Note 1 for troubleshooting.
The modem router has synchronized more than one channel.
The initialization has not started or has failed. Please refer to Note 1 for troubleshooting.
There is no internet connection. Please refer to Note 2 for troubleshooting.
On
LAN
At least one LAN port is connected to a powered-on device.
Off No LAN port is connected to a powered-on device.
On The inserted USB device is ready to use.
USB
Off No USB device is plugged into the USB port.
Flashing A USB device is being identified.
On The Wireless function is enabled.
Wireless
Off The Wireless function is disabled.
On/Off
This light remains on for 5 minutes when a WPS connection is established, then turns off.
WPS
Flashing
Note:
1. If the Downstream LED or Upstream LED is off, check your internet connection first. Refer to Connect Your Modem
Router for more information about how to make internet connection correctly. If you have already made a right
connection, contact your ISP to make sure your internet service is available now.
2. If the Internet LED is off, check your Downstream LED and Upstream LED first. If they are also off, please refer to Note
1. If the Downstream LED and Upstream LED are on, check your internet configuration. You may need to check this
part of information with your ISP and make sure everything have been input correctly.
WPS connection is in progress. This may take up to 2 minutes.
4
Chapter 1

1. 2. 2. Back Panel

Get to Know Your Modem Router
The back panel provides buttons and connection ports. Refer to the following for detailed instructions.
Item
With the modem router powered on, use a pin to press and hold the
Reset Button
WPS Button Press to start a WPS synchronization.
Wi-Fi ON/OFF
Button
USB1 and USB2
Ports
LAN1, LAN2, LAN3,
and LAN4 Ports
Cable Port For connecting to a coaxial cable.
DC Port
Power On/Off
Button
Reset button for at least 8 seconds. And the modem router will restore to its factory default settings.
Press to turn the Wi-Fi on or off.
For connecting to USB storage devices or USB printers.
For connecting to your PCs or other Ethernet network devices.
For connecting the modem router to power socket via the provided power adapter.
Press to power on or off the modem router.
Description
5
Chapter 2

Quick Start

This chapter contains the following sections:
Position Your Modem Router
Connect Your Modem Router
Activate Your Modem Router
Chapter 2
Quick Start

2. 1. Position Your Modem Router

With the modem router, you can access your network from anywhere within the wireless network coverage. However, the wireless signal strength and coverage vary depending on the actual environment of your modem router. Many obstacles may limit the range of the wireless signal, for example, concrete structures or thick walls.
For your safety and best Wi-Fi performance, please:
• Do Not locate the modem router in the place where it will be exposed to moisture or excessive heat.
• Keep away from the strong electromagnetic radiation and the device of electromagnetic sensitive.
• Place the modem router where it can be connected to the various devices as well as to a power source.
• Make sure the cables and power cord are safely placed out of the way to avoid a tripping hazard.
Tips: The modem router can be placed on a shelf or desktop.

2. 2. Connect Your Modem Router

Before connecting the device, please make sure your broadband cable service provided by your ISP is available. If there is any problem, please contact your ISP. Also, keep your hands dry during connection. Follow the steps below to connect your modem router.
1. Connect the coaxial cable and power adapter to the modem router, then power on
your modem router.
Internet
Coaxial cablePower adapter
7
Chapter 2
Quick Start
2. Wait for about 1 minute until the following LEDs are solid on.
3. Connect your computer to the modem router.
Method 1: Wired
Connect your computer’s Ethernet port to a LAN port on the modem router via an Ethernet cable.
Method 2: Wireless
Connect wirelessly by using the default SSID (Wireless Network Name) and Wireless Password printed on the Information Card or the product label of the modem router.
Method 3: Use the WPS button
Wireless devices that support WPS, including Android phones, tablets, most USB network cards, can be connected to your router through this method. (WPS is not supported by iOS devices.)
Note:
The WPS function cannot be configured if the wireless function of the modem router is disabled. Also, the WPS function
will be disabled if your wireless encryption is WEP. Please make sure the wireless function is enabled and is configured
with the appropriate encryption before configuring the WPS.
1 ) Tab the WPS icon on the device’s screen.
2 ) Immediately press the WPS button on your modem router.
3 ) The WPS LED flashes for about two minutes during the WPS process.
4 ) When the WPS LED is on, the client device has successfully connected to the
modem router.
8
Chapter 2
SSID
Information Card
Quick Start

2. 3. Activate Your Modem Router

1. Get your internet service account information and the modem router’s Information
Card ready.
Serial Number
MAC Address
Wi-Fi Password/PIN
2. Make sure your computer is set to dynamically obtain an IP address. If not, refer to
Appendix: Troubleshooting for instructions.
3. Launch a web browser, and visit any website. You will be automatically redirected to
your service provider’s self-activation page.
4. Follow the on-screen instruction to activate the modem router.
If you have any problem activating your modem router, please contact your Internet Service Provider (ISP).
Contact information of major cable ISPs:
Bright House: 1-855-222-0102
Charter: 1-888-438-2427
Cox: 1-888-556-1193
Time Warner Cable: 1-888-892-2253
The listed contact information may change. You can also find the contact information in your monthly internet service billing statement.
5. After activating your modem router successfully, wait for about 10 minutes till these
LEDs
Note:
1. If you are unable to access the internet, refer to Appendix: Troubleshooting > T4 for instructions.
2. The product should be connected to cable distribution system that grounded (earthed) in accordance with ANSI/
NFPA 70, the National Electrical Code (NEC), in particular Section 820.93 - Grounding of Outer Conductive Shield of
a Coaxial Cable.
become solid on, then you can enjoy the internet.
9
Chapter 3

Log In to Your Modem Router

Chapter 3
Log In to Your Modem Router
With a web management page, it is easy to configure and manage the modem router. The web management page can be used on any Windows, Macintosh or UNIX OS with a web browser, such as Microsoft Internet Explorer, Mozilla Firefox or Apple Safari.
Follow the steps below to log in to your modem router.
1. If the TCP/IP Protocol on your computer is set to the static (fixed) IP address,
you need to change it to obtain an IP address automatically. Refer to Appendix:
Troubleshooting > T7 to configure your computer.
2. Launch a web browser and go to http://tplinkmodem.net or http://192.168.1.1. Set
a strong password using 1-15 characters and click Save.
Note: If the login page does not appear, please refer to Appendix: Troubleshooting > T3.
3. Enter the password you set and click Log in.
Note: For subsequent logins, use the password that you have created.
11
Chapter 4

Configure Internet Connections

This chapter introduces how to manually configure your internet settings. Furthermore, you can also set up an IPv6 connection if your ISP provides IPv6 service.
This chapter includes the following sections:
Set Up an IPv6 Connection
Test Internet Connectivity
Operation Modes
Chapter 4
Congure Internet Connections

4. 1. Set Up an IPv6 Connection

If your ISP has provided a line that supports IPv6 connection as well as some detailed IPv6 parameters, you can manually set up an IPv6 connection.
Follow the steps below to set up an IPv6 connection:
1. Make sure you have set up an IPv4 connection by referring to Quick Start before
setting up an IPv6 connection.
2. Visit http://tplinkmodem.net, and log in with the password you set for the router.
3. Go to Advanced > Network > IPv6 LAN Settings. In the DHCPv6 Server Settings
section, configure the following parameters provided by your ISP.
DHCPv6 Server: Select the checkbox to enable DHCPv6 server.
Start Address: Enter a value for the DHCPv6 server to start with when issuing IP addresses.
Number of Addresses: Enter a value between 0-255 for DHCPv6 server preference. The default value is 255.
Lease Time: The Lease Time is the amount of time in which a network user will be allowed connection to the modem router with their current dynamic IP address. Enter the amount of time, in seconds, then the user will be assigned this dynamic IP address. After the dynamic IP address has expired, the user will be automatically assigned a new dynamic IP address. The default is 3600 seconds.
Rapid Commit: Select the checkbox to enable the prefix fast distribution function.
Unicast: Select the checkbox to enable the unicast function. The default setting is disabled.
13
Chapter 4
Stateless DHCPv6: Stateless DHCPv6 is a combination of “stateless Address Autoconfiguration” and “Dynamic Host Configuration Protocol for IPv6” and is specified by RFC3736. Select the checkbox to enable this function.
4. Click Save to make the settings effective. Now IPv6 service is available for your
network.
Congure Internet Connections

4. 2. Test Internet Connectivity

After manually setting up an internet connection, you need to test the internet connectivity. The modem router provides two diagnostic tools to help you locate the malfunction.
1. Visit http://tplinkmodem.net, and log in with the password you set for the router.
2. Go to Advanced > System Tools > Diagnostics.
3. Select Ping or Traceroute as the diagnostic tool and enter the parameter according
to your needs.
Ping is used to test the connectivity between the router and the tested host, and measure the round-trip time.
Target IP/Domain Name: Enter the IP address/domain name that you want to
ping.
Ping Packet Size: Enter the size of the ping packet you want to use.
Ping Count: Enter the number of times you want to ping the target device.
Ping Interval: Enter the time period between each ping.
14
Chapter 4
4. Click Start to check the connectivity of the internet. The page will display the result
Traceroute is used to display the route (path) your router has passed to reach the tested host, and measure transit delays of packets across an internet protocol network.
Target IP/Domain Name: Enter the IP Address/Domain Name you want to trace.
Max Hops: Enter the max number of hops.
of diagnosis.
Congure Internet Connections

4. 3. Operation Modes

The modem router supports two operation modes: Router Mode and Bridge Mode. The modem router uses the Router Mode by default, and you can change the mode according to your needs.

4. 3. 1. Bridge Mode

In this mode, the modem router can be configured to act as a bridging device between your LAN and your ISP. Bridges are devices that enable two or more networks to communicate as if they are two segments of the same physical LAN. If you were in Bridge Mode, change the computer settings to obtain an IP address automatically. You could then log in to the web management page at 192.168.100.1.
15
Chapter 5

Network Security

This chapter guides you on how to protect your home network from unauthorized users by implementing the following network security functions. You can control certain client devices’ access to the internet, block certain data from getting through your network, and get notified when a threat emerges or view log events.
Use Firewall
Email Local Log
Record Log in a Remote Server
Chapter 5
Network Security

5. 1. Use Firewall

1. Visit http://tplinkmodem.net, and log in with the password you set for the router.
2. Go to Advanced > Firewall > Basic.
3. Configure the basic firewall settings according to the following explanations:
Firewall Protection: Select the firewall protection level appropriate to your needs. All the allowed services will be shown in the Allowed Services section according to the Firewall Protection level you select.
Block Fragmented IP Packets: This feature helps to protect your private local network from Internet based denial of service attacks. Select the checkbox to enable this feature.
Port Scan Detection: This feature can protect your private local network from Internet based hackers who attempt to gain unsolicited access to your network by detecting open IP ports on your gateway. Select the checkbox to enable this feature.
4. Click Save.

5. 2. Email Local Log

Local Log is used to send log to an email and you can analyze the logs as long as you have access to the email.
Follow the steps below to email local log:
1. Visit http://tplinkmodem.net, and log in with the username (admin) and password
(admin or the one customized by you).
2. Go to Advanced > Firewall > Local Log.
17
Chapter 5
3. Enter your email address in the Contact Email Address field.
4. Enter the name of your SMTP sever in the SMTP Server Name field.
Network Security
5. Enter the default admin/admin or specify new username and password in the SMTP
User Name and SMTP Password fields.
6. If you want to get notified when your network is being attacked, enable E-mail Alerts.
7. Click Email Log and the log will be immediately sent to the email you set.
Tips:
1. The table displays details of the log.
2. Click Clear Log to delete all the log.

5. 3. Record Log in a Remote Server

Remote Log allows you to record specific kinds of log in a remote server. The remote server must be in the local network.
Follow the steps below to record log in a remote server:
1. Visit http://tplinkmodem.net, and log in with the username (admin) and password
(admin or the one customized by you.
2. Go to Advanced > Firewall > Remote Log.
18
Chapter 5
Network Security
3. Select the checkbox to record the corresponding events in the remote server.
4. Enter the specified IP address of the remote system log server in the Server
Address field.
5. Click Save to make the settings effective.
19
Chapter 6

USB Settings

This chapter describes how to share and access USB devices connected to the modem router among different clients.
The modem router supports USB external flash drives, hard drives and USB printers.
This chapter contains the following sections:
Local Storage Sharing
Remote Access via FTP Server
Media Sharing
Printer Sharing
Chapter 6
USB Settings

6. 1. Local Storage Sharing

Share your USB storage devices with different users on the network.

6. 1. 1. Access the USB Disk

1. Connect Your USB Disk
Insert your USB storage device into the modem router’s USB port directly or using a USB cable. Wait several seconds until the USB LED becomes solid on.
Tips:
• If you use USB hubs, make sure no more than 4 devices are connected to the modem router.
• If the USB storage device requires using bundled external power, make sure the external power has been
connected.
• If you use a USB hard drive, make sure its file system is FAT32 or NTFS.
• Before you physically disconnect a USB device from the modem router, safely remove it to avoid data damage:
Go to Advanced > USB Settings > Disk Settings and click .
2. Access Your USB Disk
By default, all the network clients can access all folders on your USB disk. Refer to the following table for access instructions. You can also customize your sharing content and set a sharing account by referring to Customize Your Settings.
¾ Method 1:
Go to Computer > Network, then click the Network Server Name (model number by default) in the Computer section.
Note:
Operations in different systems are similar. Here we take Windows 7 as an example.
Windows
computer
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