Able to provide a basic call flow of a completed B2BUA model

[ShenFF]

Able to provide a basic call flow of a completed B2BUA model, including the handling of messages such as INVITE, 1XX, 2XX, 4XX, ACK, BYE, etc.

[emiago]

Hi @ShenFF . You have that on diago lib with media.
https://github.com/emiago/diago/tree/main/examples/bridge

For plain Sipgo usage concept is similar, just have dialog server and client. One receive, other sends.
I recomend Diago due to simplification.