Siemens Schweiz Ag

Siemens-albis, Ag

Eugen Rippstein

Gunther Weisigk

Peter Lietha

Kurt Amstad

Eugen Musterle

The computer controlled communication system has communication devices (KE , . . . , KEn) and has data devices (DE , . . . , DEn) that are connected to a network server (SR) via a local network (LAN), of which devices at least one communication device (KE , . . . , KEn) and one data device (DE , . . . , DEn) are respectively associated with a user and are functionally coupled in order to fulfill technical communication performance characteristics. Via a technical communication interface subassembly (VBT), the communication devices (KE , . . . , KEn) are connected to the network server (SR), which is connected to an open or private switching center (PBX) via a transit switch (ISDN-A/Q), which network server has a gateway (GW) to couple the local network (LAN) to the communication network (ISDN). In the communication system according to the invention, it is particularly advantageous that the open or private switching center (PBX) is connected to the network server (SR) and consequently to the entire communication system via only one line, e.g. a primary rate connection. Since the data devices or PCs (DE , . . . , DEn) and the communication devices (KE , . . . , KEn) are connected to the network server (SR), the connecting cables can be laid in common conduits, by means of which a lower cost is produced for the networking of the devices (DE, KE). All technical communication data of the computer controlled communication system can be stored up in the network server (SR) and can be called up from it.

Computerized communication system for voice and data services

Key telephone system with a private branch exchange that includes a switching unit, stationary key terminals, and at least one of mobile cordless and GSM terminals. The switching unit is adapted to switch calls to the stationary key terminals and to the at least one of the mobile cordless and GSM terminals. The system also includes a first trunk group and a key server system, in which the stationary key terminals are coupled to the switching unit through the first trunk group and the key server system, at least one additional server comprising a memory unit, and a second trunk group having lines associated with each of the at least one of the mobile cordless and GSM terminals. The at least one additional server further includes an individual switching unit adapted to switch the lines associated with the at least one of the mobile cordless and GSM terminals, and at least one of the stationary key terminals is associated with at least one of at least one mobile cordless terminal and at least one GSM terminal and is associated with the lines associated the at least one of at least one mobile cordless terminal and at least one GSM terminal.

Key telephone system with cordless terminals

Communications system with mobile telephones and operating method

Subscriber stations in a telecommunication system are selectively connected and controlled by an exchange having a central control. The subscriber stations have operating conditions varying from an idle to a start condition and from a captive to the idle condition. Line connection circuits of the subscriber stations issue a signal indicative of a transfer of any subscriber station from the captive to the idle condition. Circuits common to the subscriber stations but separate from the central control monitor the subscriber stations as to the issuance of a signal indicative of a transfer of a subscriber station from the captive to the idle condition. Circuit components common to the subscriber stations and connected to the monitor circuits ascertain the particular subscriber station for which an indicative signal has been issued and carry out a release of the particular captive condition. The monitor circuit preferably monitors the subscriber stations also for a transfer from the idle to the start condition, and the system preferably is capable of issuing a corresponding request for a connection to the central control. The subscriber stations preferably are divided into groups for joint interrogation of transfer conditions, and may be subdivided into subgroups for individual interrogation of transfer conditions among the subscriber stations of a subgroup.

Growing community of inventors

Aesch, Switzerland

Eugen Rippstein