1. A communications network comprising at least two
modules (101, 102) and a common switch (105) connected
firstly to the two modules and secondly to various
different user terminals, the switch having as many
configurations as there are user terminals and modules
connected to the switch, each user terminal and each
module being associated with a particular dedicated
configuration, each configuration associated with a user
terminal including in the switch:
- a first configuration table (106) that characterizes private exchanges between the first module and the switch and that is common to all of the configurations associated with the user terminals and also with the configuration associated with the first module;
- a second configuration table (107) that characterizes private exchanges between the second module and the switch and that is common to all of the configurations associated with the user terminals and also with the configuration associated with the second module; and
- at least one third configuration table (108) that characterizes exchanges between the switch and the user terminal associated with the configuration under consideration and that is specific to said configuration;
the configuration associated with the first module having the first configuration table and the configuration associated with the second module having the second configuration table.
2. A communications network according to claim 1, wherein
the switch (105) is arranged so that each configuration
of the user terminals is made up of sub-configurations.

3. A communications network according to claim 2, wherein the switch (105) is arranged so that each sub-configuration of a given configuration is associated with a particular standardized type of communication between the switch (105) and the associated user terminal.
4. A communications network according to claim 3, wherein for at least one given configuration, at least one sub-configuration is associated with Ethernet communication and at least other sub-configuration is associated with A664 communication.
5. A communications network according to any preceding claim, wherein at least one given output port (109) of the switch (105) is common to various different user terminals.
6. A communications network according to claim 5, wherein the switch (105) is arranged in such a manner that the output port (109) is connected to as many virtual ports
(110) internal to the switch as there are user terminals connected to said output ports, each virtual port being associated with a respective user terminal, each virtual port being governed by a local relationship for data frame output over said virtual ports, the switch also having a control member (111) for controlling the virtual ports connected firstly to the various different virtual ports and secondly to the output port and managing the outputting of data frames over the output port by means of an overall output relationship.
7. A communications network according to claim 6, wherein
the overall output relationship is defined at least by
the budget allocated to each virtual port (110) .

8. A communications network according to claim 7, wherein the overall output relationship is also defined by a maximum latency allocated to each virtual port (110) .
9. A communications network according to any preceding claim, wherein the switch (105) is arranged to be controllable both in application of individual modes of operation, where each individual mode of operation is associated with a single user, and also in application of an administrator mode of operation.
10. A communications network according to any preceding
claim, wherein the communications network is an aircraft
communications network.