Thursday, February 24, 2011

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

http://h10025.www1.hp.com/ewfrf/wc/document?docname=buu50333&cc=us&dlc=en&lc=en&jumpid=reg_R1002_USEN



wrong wrong wrong. doing it that way will cause the dsl to loose connection when the fax is communicating. Only some faxes can work on dsl connections, they must have a cable equalizer and line attenuator available in the firmware of the machine so the machine can be adjusted to work. You must use a dsl filter inline with the fax machine otherwise when sending or recieving the dsl will drop out. The bad news is the dsl filter causes the line to drop by 5 dB in volume causing Rx/Tx failure.

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