HP 7310 User Guide - Page 186

your HP all-in-one. For more information on connecting this phone cord and setting up your HP all-in-one for faxing, see Fax setup. If the supplied phone cord is not long enough, you can extend it. For information see The phone cord that came with my HP all-in-one is not long enough. ● Try connecting a working phone and phone cord to the telephone wall jack that you are using for the HP all-in-one and check for a dial tone. If you do not hear a dial tone, contact your telephone company and have them check the line. ● Other equipment, which uses the same phone line as the HP all-in-one, might be in use. For example, you cannot use your HP all-in-one for faxing if an extension phone is off hook, or if you are using your PC modem to send an email or access the Internet. ● The phone line connection might be noisy. Phone lines with poor sound quality (noise) can cause faxing problems. 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, turn Error Correction Mode (ECM) off and try faxing again. For information, see Use error correction mode. If the problem persists, contact your telephone company. ● If you are using a digital subscriber line (DSL) service, make sure that you have a DSL filter connected or you will not be able to fax successfully. The DSL filter removes the digital signal and allows your HP all-in-one to communicate properly with the phone line. Obtain a DSL filter from your DSL provider. If you already have a DSL filter, make sure it is connected correctly. For information, see Case B: Set up your HP all-in-one with DSL. ● Make sure your HP all-in-one is not connected to a telephone wall jack that is set up for digital phones. 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. ● If you are using either a private branch exchange (PBX) or an integrated services digital network (ISDN) converter/terminal adapter, make sure the HP all-in-one is connected to the port that is designated for fax and phone use. Also, make sure that the terminal adapter is set to the correct switch type for your country/region, if possible. Note that some ISDN systems allow you to configure the ports for specific phone equipment. For example, you might have assigned one port for telephone and Group 3 fax and another port for multiple purposes. If you continue to have problems when connected to the fax/phone port, try using the port designated for multiple purposes; it might be labeled "multi-combi" or something similar. For information on setting up your HP all-in-one with a PBX phone system or ISDN line, see Fax setup. ● If your HP all-in-one shares the same phone line with a DSL service, the DSL modem might not be properly grounded. 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, turn off your DSL modem and completely remove power for at least 15 minutes. Turn the DSL modem back on and listen to the dial tone again. Troubleshooting information User Guide 183