B100 Expansion Mic - Proprietary Cables?
 

Are the cables that come with the B100 proprietary? I have tried using "generic" RJ-9 cables as well as the mic cables from a Polycom Soundstation and nothing seems to work. The B100 LED does not light up and it doesn't appear that the mic works unless I use the cables that it came with.

We need to get longer cables as part of an office renovation.

Thank you.