Music on hold (MOH) refers to the audio you might want to play to callers while they are waiting after their call was placed on "hold". The MOH Server is an application acting as SIP client which automatically answers to SIP INVITE messages and immediately plays audio from any source or format located anywhere (LAN, Internet). The same syntax as for SIP URIs is used:
Music On Hold Server: sipaccount@mohserver (e.g. email@example.com, or firstname.lastname@example.org:5555)
Snom does not provide MOH Server applications and has no knowledge about currently accessible public MOH servers.