Connections between IP cameras and SAFR clients/VIRGO
This connection must carry video from the IP camera so can consume high bandwidth. The ammount o bandwidth depends upon your camera video stream settings. For 4k 15 FPS video, this can take as much as 15Mbps. 2 MP (HD) 15 FPS video can take as much as 5 Mbps.
Connections between SAFR Server(s) and SAFR clients/VIRGO
Each face takes approximately 15kb in size so as you indicate, that is 120 kilobits.
When face first appears, there are a max of 3 recognition attempts. Then 1 recognition attempt every second. So I would assume the for each face there is only 120 kilobits per second.
There is other traffic such as events. A single face may result in multiple events. There is no fixed rule for how often an event is created. Typically its about 2 or 3 per appearance but if face tracking is lost more events are generated.
There is also traffic between each video feed and safr server which will be about 1 or 2 kb (8-16 kilobits) every 200 milliseconds. This can be controlled by teh status interval in global settings under Advanced Processor properties.