PROLiNK HURRICANE 8000 ADSL MODEM - Manual (Page 25)

Section 5 FAQ and Troubleshooting
If I using phone and ADSL Internet access simultaneously, will the connection speed affected?
No, as voice communications over POTS (plain old telephone service) operates at frequencies below 4Khz
and the frequencies for ADSL is higher. So, there shouldn’t have any interfere in between.
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