Multi tiered questions! We have a customer that has a 3CX server that is still on an old version (12 or 12.5). We did not upgrade them them because they actually have an iPod feeding an audio line in for their hold music. This feature was removed in some versions of 3CX and this was important to them. Our office has v15. Looking at the hold music I see an option for line ins. Does this mean we could make this work on newer versions? Also in relation to the above, I was actually trying to get this to work and I could never get the hold music to actually change. I thought it was related to the line in so I changed it to some other music and it just never changes. I even went into a queue and tried changing it and then called the queue and still just get onhold.wav. It seems like no matter what I do, it never applies the hold music changes. Any thoughts?