I have a Mitel SX-50
1. I need programming manuals/ manuals, technical specifications or product specs

2. I want to connect an external music source. Where do the leads go in into the main controller? There is a red connector that says music source...Do I plug the audio out to that connector? and I need diagrams for the main controller card...
I already have a Universal card with MOH module and music on hold source enabled in programming of the unit. Need further guidance (you see I do not have any manual)
Thank you

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Kay


Kay