A safety system for controlling and/or monitoring at least one door lock, in particular for securing escape routes, with a plurality of trigger elements (10, 10', 1010, 1010', 2010, 2010', 3010), in particular emergency buttons, wherein the safety system is designed to execute at least one function for controlling and/or monitoring the at least one door lock, wherein the safety system comprises a plurality of first bus systems (400, 400') which connect to a second bus system, wherein each of the plurality of first bus systems (400, 400') is each connected to at least one of the plurality of trigger elements (10, 10', 1010, 1010', 2010, 2010', 3010) and is connected to at least one door lock controller, wherein each of the plurality of first bus systems (400, 401) has a control device (100, 100'), wherein the safety system comprises a control center (300, 301) and the control device (100, 100') of each of the plurality of first bus systems (400, 400') and the control center (300, 301) are connected to one another via the second bus system, characterized in that the safety system for each of the first bus systems (400, 400') comprises a portable communication module (801, 801', 802), wherein a bus participant (10, 10', 1010, 1010', 2010, 100, 201) of the first bus system (400, 400') is in communicative connection with a communication module (801, 801', 802) in each of the plurality of first bus systems (400, 400'), wherein each control device (100, 100') of the safety system comprises a communication interface, wherein the communication interface is used to communicate with the communication module (801, 801', 802), wherein, to execute the function and/or to execute a further function of the safety system, communication takes place or has previously taken place, in particular repeatedly, via the communication interface with the communication module (801, 801', 802), wherein communication with the communication module (801, 801', 802) can be enabled, wherein the control device comprises a receptacle in order to accommodate the communication module (801, 801', 802) in a reversibly detachable and/or electrically contacting manner, wherein the receptacle is designed as a chip card receptacle, wherein the receptacle is arranged in the control device so as to be inaccessible to an unauthorized user, by a sabotage switch of the safety system triggering an alarm when the user, who is not authenticated, accesses the receptacle. with a plurality of trigger elements (10, 10', 1010, 1010', 2010, 2010', 3010), in particular emergency buttons, wherein the safety system is designed to execute at least one function for controlling and/or monitoring the at least one door lock, wherein the safety system comprises a plurality of first bus systems (400, 400') which connect to a second bus system, wherein each of the plurality of first bus systems (400, 400') is each connected to at least one of the plurality of trigger elements (10, 10', 1010, 1010', 2010, 2010', 3010) and is connected to at least one door lock controller, wherein each of the plurality of first bus systems (400, 401) has a control device (100, 100'), wherein the safety system comprises a control center (300, 301) and the control device (100, 100') of each of the plurality of first bus systems (400, 400') and the control center (300, 301) are connected to one another via the second bus system, characterized in that the safety system for each of the first bus systems (400, 400') comprises a portable communication module (801, 801', 802), wherein a bus participant (10, 10', 1010, 1010', 2010, 100, 201) of the first bus system (400, 400') is in communicative connection with a communication module (801, 801', 802) in each of the plurality of first bus systems (400, 400'), wherein each control device (100, 100') of the safety system comprises a communication interface, wherein the communication interface is used to communicate with the communication module (801, 801', 802), wherein, to execute the function and/or to execute a further function of the safety system, communication takes place or has previously taken place, in particular repeatedly, via the communication interface with the communication module (801, 801', 802), wherein communication with the communication module (801, 801', 802) can be enabled, wherein the control device comprises a receptacle in order to accommodate the communication module (801, 801', 802) in a reversibly detachable and/or electrically contacting manner, wherein the receptacle is designed as a chip card receptacle, wherein the receptacle is arranged in the control device so as to be inaccessible to an unauthorized user, by a sabotage switch of the safety system triggering an alarm when the user, who is not authenticated, accesses the receptacle.