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HP All-In-One Fax Products - How to connect your HP Fax Device to an ISDN, ADSL, PBX, or VoIP line
HP fax devices are designed to work with traditional analog phone services. They are not designed to work with digital phone services such as ADSL, PBX, ISDN, or VoIP.
While HP fax products are not supported on these types of lines, they might work given appropriate setup and equipment. See the information below for more information on configuring HP fax devices on ADSL, PBX, ISDN, and VoIP lines.
NOTE: This information is provided to help you set up and troubleshoot issues related to connecting an HP fax product to a digital phone line. HP recommends that you discuss telephone line setup options with the telephone service provider or systems administrator.
CAUTION: If you have Voicemail, Call waiting, or Billing tone services installed on your telephone system, please disable these features as they could interrupt fax communication.
ADSL (Asynchronous Digital Subscriber Line)
ADSL uses digital technology to transfer high-bandwidth information over ordinary copper telephone wires. Data are transmitted to the computer directly as digital data (instead of analog). This system allows the service providers to use a much wider bandwidth for transmitting the data.
Unlike regular dial-up phone services, ADSL provides continuously available "always on" connection. ADSL is generally offered at downstream data rates from 512 Kbps to about 6 Mbps.
If specified during the setup of the ADSL line, the signal can be separated so that part of the bandwidth is used to transmit analog signals (for voice and fax) while the remaining bandwidth is used to transmit digital data (for the Internet). This allows for the use of telephone, fax, and computers on the same line at the same time.
In order for analog equipment to use analog channels on an ADSL line, installation of an ADSL microfilter is required so digital and analog channels can be separated.
ADSL fax setup
CAUTION: Not all printers and faxes are compatible with ADSL services. HP does not guarantee that the HP All-in-One or fax device be compatible with all ADSL service lines or providers.
PBX (Public Branch Exchange)
A PBX (Public Branch Exchange) is a system of electronic components used to make connections among the internal telephones of an organization and connect them to the public phone network via trunk lines. PBXs often provide additional features related to call handling (that is, Call waiting, Call ID, and so on).
In a PBX environment users need to dial a prefix number to connect to the external public phone network (this prefix number is programmed by the PBX). Hence, the PBX knows that the caller wants to communicate to an external number outside the PBX environment.
PBX fax setup
CAUTION: Not all printers and faxes are compatible with PBX services. HP does not guarantee that the HP All-in-One or fax device be compatible with all PBX devices or manufacturers.
ISDN (Integrated Service Digital Network)
ISDN systems provide two B channels and one D channel over a single twisted pair copper wire. Each B channel can carry voice, fax, or Internet calls at 64 kbps, whereas the D channel manages both B channels at 16 kbps.
An NTBA (Network Termination for Basic Access) is typically installed at the end user's house or office and connects to the main switchboard. The NTBA usually operates like a PBX system as you may need to dial a prefix number to gain access to the external dial tone, and can also make internal calls.
Typically ISDN providers allow a certain range of numbers. For example, if the ISDN provider assigns a user the phone number range between 100 - 110 (allowing 10 phone numbers), then it is up to the user to assign these numbers within the ISDN environment.
An A/D converter (analog/digital converter) allows analog devices to be installed on an ISDN network. The A/D converter routes the calls to the assigned analog ports, converts digital signals into analog, and allows analog equipment to communicate over ISDN.
Equipment installed on an ISDN network must be correctly tagged indicating the type of device (that is, a telephone, modem, or fax). Each analog port on the A/D converter must be programmed with the right tag.
ISDN fax setup
CAUTION: Not all printers and faxes are compatible with ISDN services. HP does not guarantee that the HP All-in-One or fax device be compatible with all ISDN devices or manufacturers.
VoIP (Voice over Internet Protocol)
Telephone calls on VoIP (Voice over Internet Protocol) services use the Internet for data transmission and are usually the telephone lines you have when you subscribe to a bundle of Internet and phone line with your service provider.
VoIP services provide telephone services (usually long distance) through a broadband Internet connection rather than the standard telephone network. These services use packets to break up the voice signal on a phone line and transmit it digitally to the receiver where the packets are reassembled.
VoIP fax setup
CAUTION: Not all printers and faxes are compatible with VoIP services. HP does not guarantee that the HP All-in-One or fax device be compatible with all VoIP devices or manufacturers. Contact your VoIP service provider or systems administrator for further information.
Troubleshooting and help
If you are experiencing intermittent fax send and receive issues, HP recommends that you lower the baud rate speed. Lowering the speed of fax communication may solve this issue. Consult your HP All-In-One or fax reference manual for instructions.
In case you are still experiencing any fax transmission or hardware issues after following the instructions above, consult the document HP All-in One Fax Products - Cannot Send or Receive Faxes: Troubleshooting Fax Issues (c00297388) for additional solutions.