Abstract: A method, a synchronization server, a corresponding terminal, and a system for transmitting a message intended for a first terminal, referred to as a destination terminal, from a second terminal, referred to as a source terminal, to at least one third terminal, referred to as an associated terminal, sharing a same identifier with the source terminal. The method includes transmitting from the source terminal to a synchronization server a first synchronization message, in which the message intended for the destination terminal is inserted, and recovering by using the at least one associated terminal the message intended for the destination terminal from the synchronization server by using at least a second synchronization message.

Abstract: A method, a gateway, a synchronization server, a corresponding terminal and a system for transmitting a message intended for a first terminal, referred to as a destination terminal, from a second terminal, referred to as a source terminal, to at least one third terminal, referred to as an associated terminal, sharing a same identifier with the destination terminal. The method includes, following reception of the message by a gateway, transmitting from the gateway to a synchronization server the message by using a first signaling protocol and recovering by the at least one associated terminal the message intended for the destination terminal from the synchronization server by using a first synchronization message.

Abstract: A method of making secure a communication between a first and at least one second terminal is disclosed. Each terminal being configured to interact with a user via a corresponding human-machine interface, the method comprising selecting, on the first terminal, a usability index for signals in a stream; transmitting the stream from the first terminal to at least one node of a network; connecting a third-party device to the node according to the usability index; and receiving, on the at least one second terminal, the stream from the node.

Abstract: A method and device for managing a communication between a calling terminal and a called terminal in the event that it is impossible to reach a called terminal during an attempt to establish a communication according to a first mode. The method includes: receiving a message including an identifier associated with the called terminal and an indication according to which the communication cannot be established; obtaining, from identifiers associated with the calling terminal and the called terminal, a host card including at least one piece of information relating to the reachability of the user of the called terminal; transmitting, according to an instant messaging protocol, the obtained response message to the calling terminal, the host card being configured to allow the triggering of a communication according to a mode that is distinct from the first mode.

Abstract: A method and device for managing a communication between a calling terminal and a called terminal in the event that it is impossible to reach a called terminal during an attempt to establish a communication according to a first mode. The method includes: receiving a message including an identifier associated with the called terminal and an indication according to which the communication cannot be established; obtaining, from identifiers associated with the calling terminal and the called terminal, a host card including at least one piece of information relating to the reachability of the user of the called terminal; transmitting, according to an instant messaging protocol, the obtained response message to the calling terminal, the host card being configured to allow the triggering of a communication according to a mode that is distinct from the first mode.