The present invention discloses a method for receiving emergency broadcasting messages. A mechanism controls the release of the gas formed by the chemical reaction and allows the gas to reach a high pressure inside the rocket prior to release. The OCC also minimizes fragmentation of a port so as to reduce the probability of call rejection as a result of fragmentation. Each subscriber access code field may store a subscriber access code associated with a subscriber radio. One or more switches are connected to the diplexer such that the one or more switches are responsive to two or fewer control signals.