The present invention relates to A communication hub (101, 137, 203) to be used in a demanding environment, the communication hub (101, 137, 203) comprising a first number, e.g. a plurality, of first connectors (103f-i), each first connector (103f-i) configured to connect to a
communication device (207a-d), and a second number, e.g. a plurality, of second connectors (103a-e), each second connector (103a-e) configured to connect to a personal
user device (3, 5, 149, 209a-h) e.g. or preferably of a set of personal communication equipment (13, 209a-h), a
communication control data structure (119) controlling which communication devices (207a-d), being connected to the communication hub (101, 137, 203), that can communicate, via the communication hub (101, 137, 203), with which personal user devices (3, 5), being connected to the communication hub (101, 137, 203), the
communication control data structure (119) comprising data representing a first number of first port
channel data structures (125a-j), each respectively designated or assigned to a respective one of the first connectors (103f-i), or at least one or some first connectors thereof, data representing a second number of second port
channel data structures (125a-j), each respectively designated or assigned to a respective one of the second connectors (103a-e), or at least one or some second connectors thereof,, and data representing at least one port group
data structure (123, 131, 133, 135) for at least one, e.g. each, of the first port
channel data structures (125a-j) and / or for at least one, e.g. each, of the second port channel data structures (125a-j), data representing two or more links (129), and one or more
processing elements (109, 113, 115, 227) configured to link (129), in the
communication control data structure (119), a first port channel data structure (125a-j), having a
communication device (207a-d) connected therefore, to at least one port group data structure (123, 131, 133, 135) and / or, link (129), in the communication
control data structure (119), a second port channel data structure (125a-j), having a personal
user device (3, 5, 209a-h) connected therefore, to at least one port group data structure (123, 131, 133, 135), so that at least one first port channel data structure (125a-j) is linked (129) to a second port channel data structure (125a-j) via at least one port group data structure (123, 131, 133, 135), and only allow or facilitate communication between a particular
communication device (207a-d) and a particular personal
user device (3, 5, 209a-h) if the respective first port channel data structure (125a-j) and second port channel data structure (125a-j) is linked via the same port group data structure (123, 131, 133, 135).