How to share Trunk with another PBX in S-series PBX

Hello guys, welcome to Yeastar Technical Channel.
This video will show you how to share Trunk with another PBX in S-series PBX.
It will help when you purchase a new P-series PBX but you still wanna use the old trunk in S-series PBX. Then you can do some configurtion job to make the new PBX available use the old one's trunk.