Hold /Resume, hold music stuck

[Nick@Troosters]

Hello,

a client of mine has the following problem :
a person calls to them, (the persons comes in a queue) ; client picks up the Phone and talks , then clicks on transfer;
the person hears a waiting music now;
client calls a cllegue, but the collegue does not answer so she ends that call and clicks on resume to take back the person who is calling in;
the person is still hearing the hold music.
So basically the call cannot be resumed and has to be ended.

in the logs I saw this :

NAT/ALG check:L:349.3[Extn] REQUEST 'INVITE' - some of SIP/SDP headers may contain inconsistent information or modified by intermediate hop
Media session IP ('c=' attribute) is not equal to the IP specified in contact header:
Media session IP:0.0.0.0
Contact IP:10.0.0.212
Media session IP ('c=' attribute) is not equal to the SIP packet source(IPort):
Media session IP: 0.0.0.0
Received from: 10.0.0.212

I think this is concerning the problem, but what does it mean and how can I fix this ??

 

[craigreilly]

Do you have multiple IP interfaces on the phone server? If so, ensure yo uare using just one.
When you resume the call, can you talk to the person - or all they have is the hold music?

 

[Nick@Troosters]

Hello,
no there is only one ip on the server 10.0.0.11,
The person keeps hearing the hold music.

 

[mlump]

What Version of 3CX are you running?
What phones are you using?
Is this happening with a remote phone or one on the local LAN?

The ALG check failing typically indicates that there is a SIP ALG sitting between the ext and the 3CX server.