HP LaserJet Pro M521 Multifunction Printer series - Manual (Page 138)

When the answering machine answers the call, the product listens to the call and automatically
answers it if it detects fax tones.
The default setting for rings-to-answer is varies by country/region.
Use the following table to determine the number of rings-to-answer to use.
Type of telephone line Recommended rings-to-answer setting
Dedicated fax line (receiving only fax calls) Set to a number of rings within the range shown on the
control-panel display. (The minimum and maximum number of
rings allowed varies by country/region.)
One line with two separate numbers and a ring-pattern
service One or two rings. (If you have an answering machine or
computer voicemail for the other telephone number, make sure
that the product is set to a greater number of rings than the
answering system. Also, use the distinctive-ring feature to
differentiate between voice and fax calls.)
Shared line (receiving both fax and voice calls) with only an
attached telephone Five rings or more.
Shared line (receiving both fax and voice calls) with an
attached answering machine or computer voicemail Two rings more than the answering machine or computer
voicemail.
To set or change the number of rings-to-answer, use the following steps:
1. From the Home screen on the product control panel, touch the Setup button.
2. Touch the Fax Setup menu.
3. Touch the Basic Setup menu.
4. Touch the Rings to Answer button.
5. Use the keypad to enter the number of rings, and then touch the OK button.
Set distinctive ring
Ring-pattern or distinctive-ring service is available through some local telephone companies. The service
provides a way to have more than one telephone number on a single line. Each telephone number has
a unique ring pattern, so that you can answer voice calls and the product can answer fax calls.
If you subscribe to a ring-pattern service with a telephone company, you must set the product to answer
the correct ring pattern. Not all countries/regions support unique ring patterns. Contact the telephone
company to determine if this service is available in your country/region.
NOTE: If you do not have ring-pattern service and you change the ring-pattern settings to something
other than the default, All Rings , the product might not be able to receive faxes.
The settings are as follows:
● All Rings : The product answers any calls that come through the telephone line.
● Single : The product answers any calls that produce a single-ring pattern.
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