Patent ID: 8396974

Claim:
A communication system connectable to an IP Multimedia Subsystem network, IMS network, and at least two communication terminals each associated with a user, the users of the communication terminals sharing a common IP Multimedia Public Identity, IMPU, the communication system comprising: a control device for controlling sessions between the IMS network and the communication terminals, and an identity database containing information about the identities of the users and/or the communication terminals sharing the common IMPU, the control device being adapted to access the identity database when receiving a session invitation to the common IMPU via the IMS network and alert the users/communication terminals associated with the common IMPU, and storage memory for storing data, wherein the communication system is arranged to provide said data when one of the users/communication terminals accepts the session invitation, about which users/communication terminals are alerted based on said session invitation, wherein the control device is arranged to retrieve the data stored in the storage memory when one of the users/communication terminals accept the session invitation, wherein the control device is further arranged to send a notification containing information about the identity of the user/communication terminal accepting the session invitation to the other alerted users/communication terminals associated with the common IMPU, wherein the communication system is adapted to access a voice mail server for recording and storing a message when none of the users/communication terminals accepts the session invitation, wherein the control device is adapted to notify all the users/communication terminals associated with the common IMPU that a message has been recorded, wherein the control device is adapted to retrieve the data stored in the storage memory when one of the users/communication terminals consumes the recorded message, and wherein the control device is adapted to send a notification containing information about the identity of the user/terminal consuming the recorded message to the other users/communication terminals associated with the common IMPU.