PCS calls between branches

[KOG]

Hi guys, help a beginner understand the functionality of PCS. There is a central office with OXE and there are several branches where PCS is installed. Tell me, if you lose the connection of one of the branches with the center, it will be possible to call other branches from it, or do you need additional trunks with these branches? Thanks in advance for your reply.

[oldboy]

You will need public trunks to be able to complete this for incoming and outgoing calls

[KOG]

Thanks for the quick reply.