Patent ID: 7869821

Claim:
A communication client, comprising: a sound production circuit configured to produce a sound signal representative of data received on a down communication channel; a sound acquisition circuit configured to produce data to be transmitted on an up communication channel; a signal interface configured to transmit and receive signal messages (MI) on a signal channel, some of said signal messages being invitation messages, intended to set up a communication session with one or several other communication clients; a man-machine interface configured to control said signal interface, and when a “Push to Talk” type communication session has been set up, configured to change over between a transmission mode in which a microphone is active and a reception mode in which the microphone is not active; a display configured to display information based on data contained in some received signal messages; a memory designed configured to store a visiting card associated with a user of said communication client, and wherein the signal interface is configured to transmit the visiting card to said other communication client(s) by one or several invitation messages to set up a communication session, and the display is configured to completely or partially display a visiting card contained in a received signal message.