Could u recommend proper server spec for playing 100 CCTV Camera?

hi. im website manager of government office.

in our website, about 3,000ea CCTV are connected and majority of staff are using it for monitoring agriculture infrastructure real-time state like water level and pump operation state.

CCTV connection system are constructed like that

[headquarter - regional headquarter - regional office]

website server is located at headquarter and wowza streaming server is located at regional headquarter and CCTVs set on Agriculture Infrastructure connect with regional office.

there are about 100ea CCTV are streaming using 1ea wowza streaming server set on regional headquarter.

i already know server that install wowza streaming s/w spec is related on network and etc., circumstances

but i dont know how much we need the server spec for proper(although objective) streaming 100ea cctv at one server.

could u explain, PROPER SERVER SPEC (CPU RAM HDD AND NETWORK SPEED) ?