I punched down the music source 600ohm output to the violet green pair using cross connect wire. I can hear music at the violet green pair and can also get music to play out of any Nortel phone via feature 86 code. But when I place a call on hold can't hear any music playing just dead air? Programming is completed for allowing on hold music. The volume is controlled by an amplifier that has a small wheel to control the output of the music source. I have this maxed out and still can't hear anything when calls are placed on hold? I have added several music on hold systems to the Nortel systems and have not run across this before. Any ideas are greatly appreciated.