A method for automatically switching a connection from a first to a second participant of a scheduled meeting via at least one communication network, the communication network comprising a wired communication network (PSTN) and/or a cellular network, wherein during said method - allocations of the identity (rn) of terminal devices of the communication network (GSM, PSTN) to terminal-specific personal information (M1..Mn) are stored in an address or telephone book, and forward-specific information (Tb, S) and an identity of a terminal device (rn) are stored in a calendar module for each personal information (M1...Mn) of a participant scheduled for a meeting, - a connection (v) to a virtual terminal device (EGv) of a switching system is established and maintained with a terminal device having a predetermined identity, which system is connected to the wired communication network (PSTN) or the cellular network, - wherein the identity of the terminal device in the wired communication system (PSTN) and/or in the cellular network is determined by means of the switching system, - information (inf) having the identity of the terminal device establishing the connection (v) is transferred from the virtual terminal device (EGv) via a CSTA interface (CSTA) to an application, which communicates with the switching system, - a request (req) having the identity of the terminal device establishing the connection(v) is transferred with the help of the application via a corporate network, for example an intranet, to the address or telephone book, - the personal information associated to the requesting terminal device is determined in the address or telephone book with the help of the transferred identity of the terminal device establishing the connection (v), - a further request (req) having the personal information associated to the requesting terminal device, is created with the help of the application and transferred to the calendar module, the request (req) comprising the request if the person having the personal information associated to the requesting terminal device is known as participant of the meeting, and who else is participant (T, 0) of the meeting, wherein the identity of the second participant (T, 0) of the meeting is determined with the help of the stored information (M, B, 0, S, Tb, rn), - an answer (res) having the determined identity is transferred from the calendar module to the application, - a forwarding message (forw) having the determined identity is created by the application and transferred via the CSTA interface (CSTA) to the switching system, and - a forwarding of the maintained or active connection (v) is caused in the switching system by the forward-specific message (forw) from the terminal device to the terminal device of the second participant (0, T) of the meeting having the determined identity. - allocations of the identity (rn) of terminal devices of the communication network (GSM, PSTN) to terminal-specific personal information (M1..Mn) are stored in an address or telephone book, and forward-specific information (Tb, S) and an identity of a terminal device (rn) are stored in a calendar module for each personal information (M1...Mn) of a participant scheduled for a meeting, - a connection (v) to a virtual terminal device (EGv) of a switching system is established and maintained with a terminal device having a predetermined identity, which system is connected to the wired communication network (PSTN) or the cellular network, - wherein the identity of the terminal device in the wired communication system (PSTN) and/or in the cellular network is determined by means of the switching system, - information (inf) having the identity of the terminal device establishing the connection (v) is transferred from the virtual terminal device (EGv) via a CSTA interface (CSTA) to an application, which communicates with the switching system, - a request (req) having the identity of the terminal device establishing the connection(v) is transferred with the help of the application via a corporate network, for example an intranet, to the address or telephone book, - the personal information associated to the requesting terminal device is determined in the address or telephone book with the help of the transferred identity of the terminal device establishing the connection (v), - a further request (req) having the personal information associated to the requesting terminal device, is created with the help of the application and transferred to the calendar module, the request (req) comprising the request if the person having the personal information associated to the requesting terminal device is known as participant of the meeting, and who else is participant (T, 0) of the meeting, wherein the identity of the second participant (T, 0) of the meeting is determined with the help of the stored information (M, B, 0, S, Tb, rn), - an answer (res) having the determined identity is transferred from the calendar module to the application, - a forwarding message (forw) having the determined identity is created by the application and transferred via the CSTA interface (CSTA) to the switching system, and - a forwarding of the maintained or active connection (v) is caused in the switching system by the forward-specific message (forw) from the terminal device to the terminal device of the second participant (0, T) of the meeting having the determined identity.