Voice Calls:
It is possible to have Group and Private Calls with IPSC, CPSS, CPMS bridged between systems.
In Capacity MAX, Dimetra Express, Connect Plus Group calls between all systems are possible (There must be at least one group affiliated Dimetra Express or Capacity MAX subscriber to patch a call).
Private calls from Capacity MAX, Dimetra Express, Connect Plus to other systems is not possible (it is not possible to call to Private ID not registered on controller).
It is possible to make Private calls from other systems to Capacity MAX, Dimetra Express, Connect Plus.

Emergency Alert:
Emergency Alert (as a visual and sound notification) can be bridged only between two IPSC systems without NAI 
In any other system, only Emergency call or Emergency with voice to follow is bridged. The call has the Emergency attribute but no Emergency Alert notification.

Information about call initiator on Receiving radio display during bridged call:

Call from IPSC (no NAI Voice in IPSC) to CPMS	What receiving radio display shows
Group Call	Radio name specified for radio profile in TRBOnet of the Subscriber initiated the Bridge
Private call
All Call
Emergency with Voice to follow
Call from IPSC (NAI Voice in IPSC) to CPMS	What receiving radio display shows
Group Call	Radio name specified for radio profile in TRBOnet of the Subscriber initiated the Bridge
Private call
All Call
Emergency with Voice to follow
Call from CPMS to IPSC (no NAI Voice in IPSC)	What receiving radio display shows
Group Call	Radio ID of the Subscriber initiated the Bridge
Private call
All Call
Emergency with Voice to follow
Call from CPMS to IPSC (NAI voice in IPSC)	What receiving radio display shows
Group Call	Radio name specified for radio profile in TRBOnet of the Subscriber initiated the Bridge
Private call
All Call
Emergency with Voice to follow
Quick Call II from Analog system to CPMS	What receiving radio display shows
All Call	"Radio" (as for any Analog system call) is shown, tones played