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NETGEAR Nighthawk CM2050V User Manual

2.5 gbps ultra-high speed cable telephony modem for xfinity internet & voice
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User Manual
Nighthawk® 2.5 Gbps Ultra-High Speed
Cable Telephony Modem for Xfinity® Internet
& Voice
Model CM2050V
May 2020
202-12066-01
NETGEAR, Inc.
350 E. Plumeria Drive
San Jose, CA 95134, USA

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  Summary of Contents for NETGEAR Nighthawk CM2050V

  • Page 1 User Manual Nighthawk® 2.5 Gbps Ultra-High Speed Cable Telephony Modem for Xfinity® Internet & Voice Model CM2050V NETGEAR, Inc. May 2020 350 E. Plumeria Drive 202-12066-01 San Jose, CA 95134, USA...
  • Page 2 NETGEAR support resources. Contact your Internet service provider for technical support. Trademarks ©NETGEAR, Inc. NETGEAR and the NETGEAR Logo are trademarks of NETGEAR, Inc. Any non-NETGEAR trademarks are used for reference purposes only. Compliance For regulatory compliance information, visit https://www.netgear.com/about/regulatory.
  • Page 3: Table Of Contents

    Contents Chapter 1 Hardware Setup Front Panel and LEDs................6 Rear Panel....................9 Label.....................10 System Requirements................10 Install and Activate Your Cable Modem..........11 Set Up the Hardware..............11 Activate Your Internet Service With Xfinity.........13 Perform a Speed Test..............13 Connect Your Cable Modem to a Router After Installation and Activation..................14 Chapter 2 Monitor Voice Telephone Lines View Voice Status................16...
  • Page 4 Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem Chapter 5 Supplemental Information Factory Settings..................31 Technical Specifications..............31...
  • Page 5: Chapter 1 Hardware Setup

    • Install and Activate Your Cable Modem For more information about the topics covered in this manual, visit the support website at support.netgear.com. Note: An uninterruptible power supply (UPS) can be purchased separately for continued service during power outages. For a list of supported UPS models, visit...
  • Page 6: Front Panel And Leds

    Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem Front Panel and LEDs The cable modem provides status LEDs on the front. Figure 1. Front panel You can use the LEDs to verify status and connections. The following table lists and describes each LED on the cable modem.
  • Page 7 Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem Table 1. LED descriptions Icon Description Power • Solid white. Power is supplied to the cable modem. • Off. No power is supplied to the cable modem. • Solid red. The cable modem is too warm and might overheat.
  • Page 8 Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem Table 1. LED descriptions (Continued) • Solid white. The Tel 1 or 2 port is online. • Blinking white. The Tel 1 or 2 port is processing a call or the phone is off-hook.
  • Page 9: Rear Panel

    Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem Rear Panel The connections and button on the rear panel are shown in the following figure. Figure 2. Rear panel Hardware Setup User Manual...
  • Page 10: Label

    Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem Viewed from top to bottom, the back panel contains the following components: • Reset button. Pressing the Reset button resets your cable modem. If the Reset button is pressed for at least seven seconds, the Power LED blinks white and your cable modem returns to its factory settings.
  • Page 11: Install And Activate Your Cable Modem

    Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem Windows Vista Windows XP Windows 2000 Mac OS Other operating systems running a TCP/IP network • Compatible web browser: Microsoft Internet Explorer 5.0 or later Firefox 2.0 or later Safari 1.4 or later Google Chrome 11.0 or later...
  • Page 12 Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem Make sure that the cable is tightly connected. 4. (Optional) Connect a phone. Connect your phone to the Tel 1 port on the rear panel of the cable modem using the phone cable.
  • Page 13: Activate Your Internet Service With Xfinity

    Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem Activate Your Internet Service With Xfinity Before you start the self-activation process, collect the following information: • Personal information associated with your Xfinity account (you need one of the following): Mobile phone number Xfinity user name and password •...
  • Page 14: Connect Your Cable Modem To A Router After Installation And Activation

    Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem Connect Your Cable Modem to a Router After Installation and Activation After you install the cable modem and activate your Internet service, you can disconnect the computer and connect a router to the cable modem.
  • Page 15: Chapter 2 Monitor Voice Telephone Lines

    Monitor Voice Telephone Lines This chapter includes the following sections: • View Voice Status • View the MTA Call List • View the EMTA Event Log...
  • Page 16: View Voice Status

    Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem View Voice Status The cable modem functions as a multimedia terminal adaptor (MTA), allowing the cable modem to provide voice services. You can view some basic MTA voice information. To view the MTA voice status: 1.
  • Page 17: View The Emta Event Log

    Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem The user name is admin. The default password is printed on the product label. The user name and password are case-sensitive. The BASIC Home page displays. 4. Select MTA Call List.
  • Page 18: Chapter 3 Manage Your Network

    Manage Your Network After you set up the cable modem, you do not need to log in to the cable modem for normal operation. However, you can log in to the cable modem to change a very limited number of settings and monitor the cable modem. This chapter includes the following sections: •...
  • Page 19: Log In To The Cable Modem

    Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem Log in to the cable modem To log in to the cable modem: 1. Connect a computer to your cable modem. You can connect a computer to your cable modem using the following methods: •...
  • Page 20: View Cable Modem Initialization

    Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem 4. Select ADVANCED > Administration > Set Password. The Set Password page displays. 5. Type the old password, and type the new password twice. 6. Click the Apply button. Your settings are saved.
  • Page 21: View Cable Modem Status

    Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem View cable modem status To view cable modem status and usage information: 1. Launch a web browser from a computer that is connected to your cable modem. 2. Enter http://192.168.100.1. A login window opens.
  • Page 22: Specify The Cable Connection Starting Frequency

    Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem Specify the cable connection starting frequency The starting frequency is automatically generated. For most Internet connections, you do not need to specify this information. If you must enter a starting frequency, contact your Internet provider.
  • Page 23: Reset The Cable Modem To Factory Default Settings

    Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem 3. Enter the admin user name and password. The user name is admin. The default password is printed on the product label. The user name and password are case-sensitive. The BASIC Home page displays.
  • Page 24: Use The Reset Button On The Back Panel

    Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem Use the reset button on the back panel CAUTION: This process erases all settings that you configured in the cable modem. To reset the cable modem to factory default settings using the Reset button: 1.
  • Page 25: Chapter 4 Troubleshooting

    Troubleshooting This chapter provides information about troubleshooting your cable modem. The chapter includes the following sections: • Use the LEDs to Troubleshoot • Cannot log in to the cable modem • Troubleshoot the Cable Internet Connection • Troubleshoot Voice Connectivity...
  • Page 26: Use The Leds To Troubleshoot

    Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem Use the LEDs to Troubleshoot The following table provides help when you are using your cable modem's LEDs for troubleshooting. Troubleshooting User Manual...
  • Page 27 Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem Table 2. Troubleshooting your cable modem's LEDs LED Behavior Action All LEDs are off when the cable modem is plugged in. • Make sure that the power cord is securely connected...
  • Page 28: Cannot Log In To The Cable Modem

    Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem Cannot log in to the cable modem If you cannot access your cable modem from a computer that is connected to your cable modem or to a router that is connected your cable modem, check the following: •...
  • Page 29 Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem Table 3. Quick tips for troubleshooting voice connectivity Problem Possible Solution No dial tone • If you use a cordless phone, check that the base of your phone is turned on and receiving power and that the cordless phone battery is not low.
  • Page 30 Supplemental Information This appendix covers the following topics: • Factory Settings • Technical Specifications...
  • Page 31 Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem Factory Settings The following table shows the factory default settings for the cable modem. Table 4. Factory default settings Feature Default Setting Cable modem login User login URL http://192.168.100.1. User name (case-sensitive)
  • Page 32 Nighthawk CM2050V 2.5 Gbps Ultra-High Speed Cable Telephony Modem Table 5. Technical specifications Feature Specification Power adapter • Input: 110–120V, 47–60 Hz • Output: 12 VDC, 2.5A Physical specifications • Dimensions (W x D x H): 6.8 x 3.7 x 8.2 in. (172 x 94 x 208 mm) •...