here you are the fax cable has the same end - that connected to the router has an additional tae adapter placed on the hp supplied cable. the fax cable end attached to the printer is attached to the1-line port as directed by the hp representative. who also said he couldn´t help me any further- I had to conntact a telekom rep- still no answer after almost 2 weeks.

that´s the cable that was with the printer and the instructions state that one should NOT use another. In the user manual one is told to contact the network provider for an adapter for a digital voip connection. unfortunately Deutsche Telekom doesn´t seem to have an interest in talking to me about this matter and hp says they´re not responcible for helping me- I  should contact my network provider.

you don't seem to understand. the fax is built into the printer but is independent. it must be connected to an analog port or a splitter. I sent a attachment of the user manual showing the proper setup and the statment stating that an adapter was necessary for digital voip setups. hp won't help- they say it's the responsibility of the internet provider and telekom deutschland has not answered my request- it's been 4 weeks now.

"that´s the cable that was with the printer and the instructions state that one should NOT use another"

try it without the adapter (=another cable with TAE Connector)

am i right, the adapter didn't come with the officejet?