W52P - how do you get the Music on hold to work with 3cx?

[Flora_Yealink]

There is no setting on the phone itself, below is my test steps.
1. W52P with the latest version register 3cx account 1001
2. 1002 make a call to 1001, 1001 answer the call, 1001 and 1002 are in the call , can hear each other normally.
3. 1002 press Hold button
4.1001 will hear Music on hold.

if 1001 press hold button ,1002 will hear music on hold.
so it seems normal .
Would you please let us know if any steps are different from your side ?
Best Regards!