hello.
This time, we replaced the C8300 router to use it as a voice gateway.
However, there was a problem with the coloring server linkage, so I raised a question.
The coloring server is using centos 7.
C8300 router IOS version is using IOS 17.03.04a.
CUCM is using version 11.5.1.12500-21.
Symptoms include:
When a call is connected from the external smartphone to the internal IP phone, the coloring is transmitted well and when the call is answered, the coloring is retransmitted and the call session is created again.
How can I solve these symptoms?
I upload the configuration diagram, wireshark packet capture, and router debug isdn q931 results in the attached file.
