We currently have an XM Satellite Radio plugged into our UC520 to serve as our MOH. On our old phone system, we could listen to the music through the phone speaker. Is there a way to listen to the MOH through the speaker on the IP phone?
Unfortunately there is no feature that does this. One would have to put a call on hold in order to hear MOH. If this is a desirable feature, I would suggest contacting your local Cisco Account team to submit the feature request.