Voice communication system comprising a plurality of transmitting/receiving systems for transmitting and/or receiving radio signals to a radio station group and/or from a plurality of radio station groups, wherein the radio station groups each comprise a plurality of geographically distributed radio stations (7a, 7b, 7c) and wherein voice radio messages are each transmitable on different radio channels to the individual radio station groups and/or receivable by the individual radio station groups, - wherein the transmitting/receiving systems are connected to a first common controller workstation, - wherein the first controller workstation comprises a loudspeaker for outputting voice radio messages to a user, a microphone for receiving voice radio messages emitted by the user, and an input unit, - wherein via the input unit a receive transmission mode or a transmit/receive transmission mode is selectable by the user for the individual radio station groups, and - wherein via the input unit an encrypted communication mode or an unencrypted communication mode is selectable by the user for the individual radio station groups, - wherein the first controller workstation comprises a push-to-talk unit, and - wherein the first controller workstation comprises a control and processing unit, wherein the control and processing unit comprises a buffer memory and wherein the radio channels of the individual radio station groups as well as the respectively selected transmission mode are stored in the buffer memory, and - wherein the push-to-talk unit comprises at least two configurable push-to-talk buttons (PTT1, PTT2), wherein via the input unit each of the push-to-talk buttons (PTT1, PTT2) is assignable by the user to at least one radio station group and one communication mode, characterized in that the control and processing unit is designed to check whether the same communication mode is assigned to the individual radio station groups when several radio station groups are assigned by the user to a respective push-to-talk button (PTT1, PTT2). a plurality of transmitting/receiving systems for transmitting and/or receiving radio signals to a radio station group and/or from a plurality of radio station groups, wherein the radio station groups each comprise a plurality of geographically distributed radio stations (7a, 7b, 7c) and wherein voice radio messages are each transmitable on different radio channels to the individual radio station groups and/or receivable by the individual radio station groups, - wherein the transmitting/receiving systems are connected to a first common controller workstation, - wherein the first controller workstation comprises a loudspeaker for outputting voice radio messages to a user, a microphone for receiving voice radio messages emitted by the user, and an input unit, - wherein via the input unit a receive transmission mode or a transmit/receive transmission mode is selectable by the user for the individual radio station groups, and - wherein via the input unit an encrypted communication mode or an unencrypted communication mode is selectable by the user for the individual radio station groups, - wherein the first controller workstation comprises a push-to-talk unit, and - wherein the first controller workstation comprises a control and processing unit, wherein the control and processing unit comprises a buffer memory and wherein the radio channels of the individual radio station groups as well as the respectively selected transmission mode are stored in the buffer memory, and - wherein the push-to-talk unit comprises at least two configurable push-to-talk buttons (PTT1, PTT2), wherein via the input unit each of the push-to-talk buttons (PTT1, PTT2) is assignable by the user to at least one radio station group and one communication mode, - wherein the transmitting/receiving systems are connected to a first common controller workstation, - wherein the first controller workstation comprises a loudspeaker for outputting voice radio messages to a user, a microphone for receiving voice radio messages emitted by the user, and an input unit, - wherein via the input unit a receive transmission mode or a transmit/receive transmission mode is selectable by the user for the individual radio station groups, and - wherein via the input unit an encrypted communication mode or an unencrypted communication mode is selectable by the user for the individual radio station groups, - wherein via the input unit a receive transmission mode or a transmit/receive transmission mode is selectable by the user for the individual radio station groups, and - wherein via the input unit an encrypted communication mode or an unencrypted communication mode is selectable by the user for the individual radio station groups, - wherein the first controller workstation comprises a push-to-talk unit, and - wherein the first controller workstation comprises a control and processing unit, wherein the control and processing unit comprises a buffer memory and wherein the radio channels of the individual radio station groups as well as the respectively selected transmission mode are stored in the buffer memory, and - wherein the push-to-talk unit comprises at least two configurable push-to-talk buttons (PTT1, PTT2), wherein via the input unit each of the push-to-talk buttons (PTT1, PTT2) is assignable by the user to at least one radio station group and one communication mode, characterized in that the control and processing unit is designed to check whether the same communication mode is assigned to the individual radio station groups when several radio station groups are assigned by the user to a respective push-to-talk button (PTT1, PTT2).