Do you have music on hold (MOH) at all now?
if MOH is new, then each stations' COR determinies if a caller on hold at that station hears the music
So you could implement system-wide MOH but then restrict it in COR so only the "couple of extensions" hear it
for MOH you need a music source with licensed music, a coupler which connects to and AUX circuit pack or analog port, then you put the port number of your music source in page 1 of system-parameters features
Let me know if you need more help
Andy Backs
MVD Communications
andy.backs@mvdcommunications.com