logs
yes, the 3cx server can use 3cx to connect to both and make/receive calls.
Stopped and started all 4 services and this is the only thing on the "Sever Status" screen
3CX Phone System v1.9.464.0 Status: Unknown
Time Method Action Call ID Call source Call destination Message
11:57:40.424 >>> Log started >>>
11:57:40.424 SessionMgr::run ** Adding transports **
11:57:40.424 SessionMgr::run ** Initialize DUM **
11:57:40.424 SessionMgr::run ** Initialize Server Authentication **
11:57:40.424 SessionMgr::run ** Initialize Client Authentication **
11:57:40.549 SessionMgr::run ** Initialize Lines Manager **
11:57:40.565 :

BA ** Database connection Ok **
11:57:40.581 LineImpl::update Line:ctor: register line 08458691831
11:57:40.581 ::ListenConnect SL: connected sbsapps:0/MediaServer at [sbsapps]/MediaServer
11:57:40.581 ::MediaServerConnected Media Server is connected
11:57:40.581 LineImpl::update Line:ctor: register line 15037663621
11:57:40.581 SessionMgr::run ** Initialize Status Monitor **
11:57:40.581 SessionMgr::run ** Start Session Manager **
11:57:40.581 SessionMgr::thread ** Entering Main Loop **
11:58:08.238 ::ListenConnect SL: connected sbsapps:0/PHPExtension_0 at [sbsapps]/PHPExtension_0
11:59:04.146 LineImpl::update Line:ctor: register line 08458691831
11:59:04.146 LineImpl::update Line:ctor: register line 15037663621