HP LaserJet Pro MFP M521 series - DSL

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A digital subscriber line (DSL) uses digital technology over standard copper telephone wires. This

product is not directly compatible with those digital signals. However, if the configuration is specified


Use fax


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during DSL setup, the signal can be separated so that some of the bandwidth is used to transmit an

analog signal (for voice and fax) while the remaining bandwidth is used to transmit digital data.


Not all faxes are compatible with DSL services. HP does not guarantee that the product will

be compatible with all DSL service lines or providers.

A typical DSL modem employs a filter to separate the higher frequency DSL modem communication

from lower frequency analog phone and fax modem communication. It is often necessary to use a filter

with analog phones and analog fax products that are connected to a telephone line used by a DSL

modem. The DSL service provider usually provides this filter. Contact the DSL provider for more

information or for assistance.