Patent ID: 7555304

Claim:
A method for setting up a push-to-talk communications link between a first push-to-talk client unit and at least one second push-to-talk client unit, the method comprising: transmitting a push-to-talk connection setup message from the first push-to-talk client unit to a push-to-talk server unit, wherein the push-to-talk connection setup message contains a push-to-talk mode information item with which it is specified, whether the requested push-to-talk communication link should be built in a push-to-talk confirmed mode or a push-to-talk unconfirmed mode, wherein an enable signal is transmitted to the first push-to-talk client unit to enable transmission of useful data depending on a communications link mode from the push-to-talk server unit at different times within the scope of the setup of the push-to-talk communications link; and setting up the push-to-talk communications link from the push-to-talk server unit to the at least one second push-to-talk client unit taking into account the push-to-talk mode information in the push-to-talk connection setup message.