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Compatibility
Major U.S. Cable Providers
Download Speed (Internet)
Up to 343 Mbps
DOCSIS
3.0
Gigabit Ethernet Port
1
Wi-Fi
None
Telephone Port
None
Warranty
1-year warranty; 2-year warranty (European models)
CM820: Quick Start Guide
Preview
Download
CM820: User Guide
Preview
Download
CM820: User Guide (French)
Preview
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CM820: User Guide (German)
Preview
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CM820: User Guide (Spanish)
Preview
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CM820: Wall Mount Template Instructions
Preview
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