HP9015 sends fax, but cannot receive inbound on Comcast VOIP

[jcgeneral]

Outboudn fax test successful, inbound keeps going right to digital voicmail on Comcast VOIP even though i have rings for VM set to 2 and incoming fax set to 6.

[Dragon-Fur]

@jcgeneral 

Welcome to the HP Community Forum.

Printer / Fax is not always fond of VOIP.

Open User Guide

See the explanation and the suggestion on Page 83 to slow the fax speed.

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HP OfficeJet Pro 9015 All-in-One Printer 

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[jcgeneral]

Hi, thanks. I already tried those instructions and set to slowest speed with error correction turned off.   Outbound works on the dial tone, it's inbound that keeps going directly to the digital VM.

What can be done to make the inbound call recognizable to the fax?

[Dragon-Fur]

@jcgeneral 

You are welcome.

What else?

No idea beyond what the manual says about the connection type.

VOIP not actually a supported option -- the manual explains "what to try".

I've never had to use it.

Page 84 suggests the possible need for a digital-to-analog filter / converter.

Page 85 explains disabling ECM.

Excerpted:

Fax and digital phone services
Many telephone companies provide their customers with digital phone services, such as the following:
● DSL: A Digital subscriber line (DSL) service through your telephone company. (DSL might be called ADSL in your country/region.)
● PBX: A private branch exchange (PBX) phone system.
● ISDN: An integrated services digital network (ISDN) system.
● VoIP: A low-cost phone service that allows you to send and receive faxes with your printer by using the Internet. This method is called Fax on Voice over Internet Protocol (VoIP).

For more information, see Fax on Voice over Internet Protocol on Page 85

HP printers are designed specifically for use with traditional analog phone services. If you are in a digital phone environment (such as DSL/ADSL, PBX, or ISDN), you might need to use digital-to-analog filters or converters when setting up the printer for faxing.

NOTE: HP does not guarantee that the printer will be compatible with all digital service lines or providers, in all digital environments, or with all digital-to-analog converters. It is always recommended that you discuss with the telephone company directly for the correct setup options based on their line services provided.

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Page 85

Fax on Voice over Internet Protocol
You might be able to subscribe to a low cost phone service that allows you to send and receive faxes with your printer by using the Internet. This method is called Fax on Voice over Internet Protocol (VoIP).
The following are indications you probably use a VoIP service:
● Dial a special access code along with the fax number.
● Have an IP converter box that connects to the Internet and provides analog phone ports for the fax connection.

NOTE: You can only send and receive faxes by connecting a phone cord to the port labeled on the back of the printer. This means that your connection to the Internet must be done either through a converter box (which supplies regular analog phone jacks for fax connections) or your telephone company.

TIP: Support for traditional fax transmission over any Internet protocol telephone systems are often limited. If you experience problems faxing, try using a slower fax speed or disabling the fax error-correction mode (ECM). However, if you turn off ECM, you cannot send and receive color faxes.  If you have questions about Internet faxing, contact your Internet faxing services support department or your local service provider for further assistance.

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Thank you for participating in the HP Community.

Our Community is comprised of volunteers - people who own and use HP devices.

Click Helpful = Yes to say Thank You

Question / Concern Answered, Click "Accept as Solution"