P2p HT813 for UCM 6202



Hello how are you?

Can someone help me I have an HT813 installed in the company (A) Trunck Sip, but I use all UCM 6202 resources (IVR, IVR, GROUPS, etc.)
I would like to know if there is a P2P solution to connect the two companies without the need to release communication ports and so on.

Thank you!


in the first company I imagine there is UCM, and in the second company what is there?
Is there a VPN between the two companies?