Patent ID: 8391908

Claim:
A method, during a first communication on a first communication system, of establishing multiple instances of a different type of communication on a second communication system, comprising: receiving an invitation, including a number of address details of at least one participant of the first communication, by a predetermined user having an address to join the first communication, wherein the address is stored in a contact list of a first communication terminal, an intermediate module arranged for, in response to receiving the invitation of the predetermined user, establishing the multiple instances of a different type of communication on a second communication system, wherein the first communication is a push-to-talk communication, wherein the multiple instances of the different type of communication are a telephone conference, wherein receiving an invitation includes: receiving the invitation at the intermediate module capable of accessing the address details of each participant within the invitation, wherein the intermediate module has communication access to a first communication manager and upon receiving the invitation, the intermediate module causing the first communication manager to terminate the first communication.