Solve DSL problems
A digital subscriber line (DSL) uses digital technology over standard copper phone wires. These DSL
services rely on an AM signal. The product is a Group 3 fax device, which operates below the DSL
capability and is not directly compatible with digital signals. However, if the configuration is specified
during the DSL line setup, the signal on a DSL line can be separated so that some of the bandwidth is
used to transmit an analog signal (for voice and fax), while the remaining bandwidth transmits digital
data. Split the signal to use both the telephone or fax and the computer on the same line and at the
same time.
NOTE: Not all printers and faxes are compatible with DSL services. HP does not guarantee that the
HP LaserJet product will be compatible with all DSL service lines or providers.
The DSL modem requires a high-pass filter. When DSL service is installed, the service provider
sometimes supplies a splitter, which includes a low-pass filter, for the normal phone wiring. If not, the
user should contact the DSL provider to request a filter or splitter so that a fax modem can operate on
the line.
NOTE: HP recommends discussing the DSL-line setup options with the DSL service provider. Consult
the DSL provider for technical installation requirements.
An Asymmetric Digital Subscriber Line (ADSL) is a version of DSL that provides greater efficiency by
allowing upload and download rates to differ. Because ADSL is a version of DSL, the previous DSL
information also applies to ADSL.
PBX line problems
The HP LaserJet product is an analog device that is not compatible with all digital phone environments
(unless a digital-to-analog converter is used). It might be difficult for you to solve fax issues without
assistance from someone who is familiar with the technical details of the customer’s digital environment
and the analog converter. HP does not guarantee that the HP LaserJet product will be compatible with
digital environments or digital-to-analog converters.
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