Hi I have configured Snom M9 with 3CX and I can make and receive calls and transfer etc. The only problem so far is that when I put a call on hold using the M9, there is no hold music. I have configured 3CX to deliver audio but that hasn't made a difference. I have configured a Grandstream GXP2000 to the same 3CX server and that plays hold music correctly. Snom Firmware version = SIP=9.1.75 DCM=GLOBALNETFTCL14N20100611,JUL 01 2009 3CX version = 9.13545 with SP1 Any help will be sincerely appreciated.