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Getting to know the Linksys CM3008 DOCSIS 3.0 Cable Modem (8x4 Bonded Channels)

The Linksys CM3008 DOCSIS 3.0 Cable Modem (8x4 Bonded Channels) is compatible with all major cable broadband providers, ensuring easy plug-and-play setup.
The Linksys CM3008 has channel-bonding technology that allows you to get the most out of your existing cable broadband connection.  This provides you with stable and high-speed Internet connectivity, which is ideal for media streaming, online gaming and web browsing.  It also features the Intel® Puma™ 5 chipset to achieve high-speed downstream and upstream performance.
Front view

User-added image
Overview and Features
  • Ideal for Internet plans up to 100 Mbps:
    • Stable, high-speed connectivity ideal for streaming and web browsing
  • Compatible with all major cable providers:
    • Eliminate monthly modem rental fees with your cable provider
  • Optimize your existing Internet connectivity:
    • Eight (8) Download and four (4) Upload Bonded Channels
  • Certified for Data Over Cable Service Interface Specification (DOCSIS) 3.0 cable Internet standard:
    • Able to handle high-bandwidth transfer rates over existing cable lines with speeds of up to 343 Mbps
Top view 

User-added image
  • User-added image Power port - Provide power to the Linksys CM3008 by connecting a power adapter into this port.
  • User-added image Ethernet port - Connect an Ethernet cable from this port to your computer or to a router.
  • User-added image Cable port - Connect an RF F- type coaxial cable from your wall jack to your Linksys CM3008 for an active cable signal.
Product Specifications
  • One (1) RF F-type female 75 ohm connector
  • One (1) RJ-45 Ethernet port 10/100/1000 Mbps (Auto-MDI / MDIX)
  • Reset button
NOTE:  Press and hold this button for five (5) seconds to restore settings to factory defaults and reboot the Linksys CM3008.  The Reset button is located at the modem's front panel
  • Maximum Line Rate:
    • Up to 343 Mbps (Download); Up to 122 Mbps (Upload)
  • LED lights:
    • Power, Receive (downstream), Send (upstream), Status, Ethernet
​NOTE:  To know more about the Linksys CM3008's LED light behavior, click here
  • Power input:
    • Direct Current (DC) 12 V / 1 A or 12 V / 2 A
  • Compatible Internet Service Provider (ISP):
    • Time Warner Cable®
    • Comcast XFINITY®
    • Charter
    • Cox®
  • Reception Demodulation:
    • Demodulation:  64QAM, 256QAM
    • Data Rate:  Up to 343 Mbps with eight (8) bonded downstream channels
    • Frequency (edge-to-edge):  108 ~ 1002 MHz
    • Channel Bandwidth:  6 MHz
    • Signal Level:  -15 dBmV to 15 dBmV
    • Input return loss:  > 6 dB
  • Transmitter Modulation:
    • Modulation:  QPSK, 8QAM, 16QAM, 32QAM, 64QAM, and 128QAM (SCDMA only)
    • Data rate of up to 122 Mbps with four (4) upstream channel bonding
    • Frequency:  5 ~ 42 MHz
    • Output return loss:  > 6dB
  • Protocol Support:
    • DOCSIS 3.0
    • Backward compatibility with DOCSIS 2.0 and 1.1
    • IPv4 / IPv6​
  • Dimensions:  
    • 110 mm (width) x 70 mm (depth) x 25 mm (height)
  • Weight:  
    • 100 g ± 10 g

Related Articles:

Setting up your Linksys CM3008 DOCSIS 3.0 Cable Modem (8x4 Bonded Channels)
Linksys CM3008 DOCSIS 3.0 Cable Modem (8x4 Bonded Channels) Frequently Asked Questions

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