Cisco DPC2434 User Manual page 132

Telephone Service Frequently Asked Questions
Q. Can I surf the Internet and make telephone calls at the same time?
A. Absolutely. Telephone service is provided separately from Internet data services.
Internet surfing and other data services do not affect the quality of your telephone
calls. If these services are enabled by your cable service provider, you can make
telephone calls and surf the net at the same time.
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