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Using an HP All-in-One or Fax Product on a PBX, ISDN, or DSL Phone System

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Introduction

The HP fax products are designed to work with traditional analog phone services. They are not designed to work with digital phone services such as DSL, PBX, or ISDN.
While the HP fax products are not supported on these types of lines, they might work with the proper setup and equipment. See the information below for more information on configuring the HP fax product for DSL, PBX, and ISDN lines.
This information is provided as a courtesy to help set up and troubleshoot issues related to connecting an HP fax product to a digital phone line. Line setup options should be discussed with the telephone service provider.
To obtain information or support, contact your phone service provider or system administrator.

DSL

DSL (Digital Subscriber Line) is a special service that allows digital data to be delivered to a computer using a normal telephone line. DSL (also referred to as XDSL, ADSL, HDSL, or RADSL) uses a much higher bandwidth for transmitting information than the HP fax product is capable of understanding.
To use a fax machine (or any regular phone services) with a DSL line, a filter must be used to reserve some of the bandwidth for standard analog use. This allows for the use of the telephone or fax, and computer on the same line and at the same time.
When setting up DSL with a service provider, request filters for the wall jacks where regular faxing and telephone service will also be used.
NOTE:Not all printers and faxes are compatible with DSL services. HP does not guarantee that the HP fax product will be compatible with all DSL service lines or providers.
Refer to the diagrams below for information on the various configurations that will allow the HP fax product to be used on a DSL line. Refer to your phone service provider for more information/options.
NOTE:Only setup options 1, 2, and 3 are viable for the HP Fax 1050 because it does not have a 2-ext port to attach additional phone appliances.

Setup option 1

Use this option if the DSL router is not in the same wall jack as the fax.
The HP fax product can be connected to a wall jack with an inline filter installed between (refer to the image below). If the fax is connected without the filter, there will be interference with the faxing capability.
Figure 1: Inline filter
Inline filter
1 - Wall jack
2 - DSL filter
3 - HP fax product

Setup option 2

Use this option if the fax is connected to the same wall jack as the computer, and the router has a built-in DSL filter.
The fax and computer connections need to be split with a router (refer to the image below). To use this setup, the router must have a built-in DSL filter (such as Cisco 675 router) to ensure that the DSL signal is filtered from the fax connection.
Figure 2: Router with built-in DSL filter
Router with built-in DSL filter
1 - Wall jack
2 - DSL router with a built-in filter
3 - HP fax product
4 - Computer

Setup option 3

Use this option if the fax is connected to the same wall jack as the computer, and the router does not have a built-in DSL filter.
The fax and computer connections will need to be split with a router. If the router does not have a built-in DSL filter (such as a Cisco 678 router), an inline filter needs to be installed between the fax and the router to ensure that the DSL signal is filtered from the printer connection (refer to the image below).
Figure 3: Router without a filter
Router without a filter
1 - Wall jack
2 - DSL router wtihout a built-in filter
3 - Computer
4 - HP fax product
5 - DSL filter

Setup option 4

Use this option if the fax is connected to the same wall jack as the computer, and the computer has a built-in filter.
Connect the computer to the wall jack and the fax directly to the computer (refer to the image below).
Figure 4: Computer with a built-in filter
Computer with a built-in filter
1 - Wall jack
2 - Computer with a built-in filter
3 - HP fax product
4 - Telephone or answering machine

Setup option 5

Use this option if the fax is connected to the same wall jack as the computer, and the computer does not have a built-in filter.
The fax and the computer connection will need to be split with a filter (refer to the image below).
Figure 5: Computer without a built-in filter
Computer without a built-in filter
1 - Wall jack
2 - Computer without a built-in filter
3 - DSL filter
4 - HP fax product
5 - Telephone or answering machine

Setup option 6

Use this option as an alternative way to connect the fax to the same wall jack as a computer without a built-in filter (setup option 5).
The fax can also be connected to the same telephone wall jack as a computer via a splitter (refer to the image below).
Figure 6: Connecting with a splitter
Connecting with a splitter
1 - Wall jack
2 - Line splitter
3 - DSL filter
4 - HP fax product
5 - Telephone or answering machine
6 - Computer
7 - DSL router

PBX

PBX systems operate differently than a standard dedicated line. The PBX system might not have a standard dial tone that the fax will recognize until an access code (usually 9) has been dialed.
Some HP All-in-One products have a Connected to a PBX phone system option. This option (if available) can be selected through the HP Director, from the Dialing tab of the Fax Settings.
This selection allows the fax to start dialing the number without first verifying the presence of a dial tone. Because there is no standard busy signal in PBX phone systems, if the HP All-in-One product does not connect to another fax or detect a busy signal, it cancels the fax after 60 seconds.
On a PBX system, the fax might attempt to dial too quickly. Insert a pause into the dialing sequence just before and after the first number.
NOTE:Insert pauses at the beginning by pressing any number key, Backspace , or Redial/Pause . Example: -9-1234567
Contact the phone system administrator for additional assistance.

ISDN

ISDN is a telephone company technology that provides digital service typically in increments of 64 Kb/s channels. The phone company installs services within their phone switches to support this digitally switched connection service.
Connecting to an analog telephone port (also called an R-interface port) on an ISDN terminal adapter might enable the HP fax product to function on an ISDN service.
Contact the ISDN provider for more information and to request an R-interface adapter.