Patent ID: 8412253

Claim:
A Push to talk Over Cellular [PoC] Server for providing PoC communication services in a communications system, said PoC Server being arranged to simultaneously perform a first PoC Session between a first PoC Client and at least a second PoC Client, and at least one second PoC Session between said first PoC Client and at least a third PoC Client in accordance with a priority setting, wherein said PoC Server is operative to: receive, from said at least second PoC Client, a first information indicating that a user of said at least second PoC Client wants to alert the user of said first PoC Client about relevant Media being shared in said first PoC Session; or receive, from said at least third PoC Client, a second information indicating that a user of said at least third PoC Client wants to alert the user of said first PoC Client about relevant Media being shared in said at least second PoC Session; and, if the received information is a notification, forward said received information to said first PoC Client; or, if the received information is an override message, change said priority settings for said first and/or said at least second PoC Sessions associated with said first PoC Client in accordance with said override message.