MOH instead of ringing

Hi all,

I’m facing an issue with MOH. I installed the last stable version of FreePBX via .iso


I compiled the asterisk to enable TLS/SRTP and it works very good.
The only problem is that when I make an outbound call I’ve MOH instead of real ringing.

-- SIP/XXX-SONUS-NY-000004d5 is ringing
-- Call on SIP/XXX-SONUS-NY-000004d5 placed on hold
-- Started music on hold, class 'default', on SIP/307-000004d4
-- SIP/XXX-SONUS-NY-000004d5 is making progress passing it to SIP/307-000004d4
-- Stopped music on hold on SIP/307-000004d4

My SIP trunk is with a Sonus GSX switch. With other trunks it’s ok.
I make SIP traces, but there is no any difference.

Do you have any idea?