I need wired intercom Box for more intercom beltpack.

I'm using ATEM Constellation8K with 6 URSA Broadcast G2 cameras.
And I using only it's intercom.
But When I want to extra one or two intercom beltpack nearby ATEM switcher, I can't find good way for this....
I just want to extra one or two Beltpack + headset.
Which is best ??

Constelation have RJ45 with input and output intercom signals .. U can send it where U need .. Its fine , if beltpacks have PTT button ..