HP C7100 manual If you hear noise, do the following

●Fax over Internet Protocol (FoIP)

●An ISDN service

Cause The HP All-in-One might be connected to a telephone wall jack that is set up for digital phones.

Solution Make sure you connect the HP All-in-One to an analog phone line or you will not be able to send or receive faxes. To check if your phone line is digital, connect a regular analog phone to the line and listen for a dial tone. If you do not hear a normal sounding dial tone, it might be a phone line set up for digital phones. Connect the HP All-in-One to an analog phone line and try sending or receiving a fax.

Cause The HP All-in-One shares the same phone line with a DSL service and the DSL modem might not be properly grounded.

Solution If the DSL modem is not properly grounded, it can create noise on the phone line. Phone lines with poor sound quality (noise) can cause faxing problems. You can check the sound quality of the phone line by plugging a phone into the telephone wall jack and listening for static or other noise.

If you hear noise, do the following

1.Turn off your DSL modem and completely remove power for at least 15 minutes.

2.Turn the DSL modem back on.

3.Listen to the dial tone again. If the dial tone sounds clear (no noise or static), try sending or receiving a fax.

Note You might notice static on the phone line again in the future. If the HP All-in- One stops sending and receiving faxes, repeat this process.

If the phone line is still noisy, contact your phone company. For information on turning your DSL modem off, contact your DSL provider for support.

Cause You are faxing over the Internet using an IP phone, and there was a problem with the transmission.

Solution Try resending your fax at a later time. Also, make sure your Internet service provider supports faxing over the Internet.

If the problem persists, contact your Internet service provider.

The HP All-in-One cannot send faxes, but can receive faxes

Cause The HP All-in-One is not set up properly for faxing.

Solution Follow the instructions provided in this guide to set up the HP All-in-One properly for faxing, based on the equipment and services you have on the same phone line as the HP All-in-One. Then, run a fax test to check the status of the HP All-in-One and to make sure you set it up properly.

The HP All-in-One prints a report with the results of the test. If the test fails, review the report for information on how to fix the problem.

Cause The HP All-in-One might be dialing too fast or too soon.

Solution You might need to insert some pauses in the number sequence. For example, if you need to access an outside line before dialing the phone number, insert a pause following the access number. If your number is 95555555, and 9 accesses an outside line, you might insert pauses as follows: 9-555-5555. To enter a pause in the fax number you are typing, press the Space button repeatedly until a dash (-) appears on the display.

If you are using a speed dial entry to send the fax, update the speed dial entry to include pauses in the number sequence.

Troubleshooting and support

Basics Guide 85