OpenScape Personal Edition V7 - no sound

[Omenas]

Hello,
I still have problem with OpenScape Personal Edition V7.
The App works on my computer - I can call, when I am called, the computer rings, I can answer.
However, when I call, I don't hear the call tone. Also, when the subscriber answers, I don't hear any sound on the speakers except for a very low hiss. It seems that the B channels are not connected.
Is it possible that there is a problem in the network or that the subscriber is missing some settings? Maybe there should be some individual settings for SBCSU, COSSU.......?
Now, the only difference from a normal HFA subscriber is:
DVCFIG =OPTIIP&API
APICLASS=TSX

 

[LAAZ]

Have you done the audio setting in advance settings

 

[Omenas]

LAAZ, thanks for the reply, but the problem is already solved. The problem was in the company's network firewall.
Now there is another problem: not displaying caller names from LDAP. LDAP is available. LDAP returns contacts when searching for contacts, but does not display names during a call. Could it be because there is nothing listed under "LDAP Directory Provider ->LDAP Directories ->LDAP Directories Dialog ->Number"? In this section "Enter the LDAP phone number attribute for name look-up" maybe I must write some parameter? If so, what and in what format?