1) Call can be setup, this show that the signal is“OK” ( see the highlighted section)
DRT After setting up call, there is no media stream available
Media stream between internal eSpace and SBC core side is up, but media stream between SBC access side and external eSpace is down
There is no media packet between SBC access side and external eSpace
Next, we checked the port of Huawei SBC, NAT for SBC access Firewall.
The port are correctly configured and there is NO issue with the settings.
The problem that escalated to NO MEDIA is most probably the Firewall issue.
The Firewall is not allowing those port to communicate in return NO MEDIA STREAM can be sent.
Firewall port needed to be configured accordingly in order for the MEDIA STREAM to take place
Port need to be configured for media stream. Port configuration of media stream can be refer according to below;