Abstract: The invention relates to a centrifugal fan having a fan housing with an electric motor which is provided outside on the fan housing and is supported by a motor mounting, said motor mounting being sealed relative to the fan housing by means of a seal which is at the same time the vibration-isolating element between the electric motor and the fan wheel provided in the fan housing.

Abstract: The invention relates to a gas control unit of modular design, in particular for controlling the quantity of gas to be fed to a gas burner, having a pneumatically controlled gas control valve that is configured as a whole as a module and is usable in such a gas control unit of modular design together with a gas safety valve.

Abstract: The invention relates to a gas regulating unit of modular construction, in particular for regulating the amount of gas to be supplied to a gas burner, and to a gas regulating valve which, as a whole, is in the form of a module and which can be used in an aforementioned gas regulating unit of modular construction.

Abstract: The invention relates to a centrifugal fan having a fan housing with an electric motor which is provided outside on the fan housing and is supported by a motor mounting, said motor mounting being sealed relative to the fan housing by means of a seal which is at the same time the vibration-isolating element between the electric motor and the fan wheel provided in the fan housing.

Abstract: The invention relates to a compact centrifugal fan, in which a motor mounting lies on an elastomeric element arranged in a through-opening between the fan housing and the motor mounting, said motor mounting being fixed to the fan housing by means of the elastomeric element.

Abstract: The invention relates to a gas control valve for the control of a quantity of gas to be supplied to a gas burner, having a direct pressure regulator which has a valve body that can be moved by an electronically controlled stepper motor.

Abstract: The invention relates to a gas control unit of modular design, in particular for controlling the quantity of gas to be fed to a gas burner, having a pneumatically controlled gas control valve that is configured as a whole as a module and is usable in such a gas control unit of modular design together with a gas safety valve.

Abstract: The invention relates to a gas regulating unit of modular construction, in particular for regulating the amount of gas to be supplied to a gas burner, and to a gas regulating valve which, as a whole, is in the form of a module and which can be used in an aforementioned gas regulating unit of modular construction.

Abstract: The invention relates to a gas control valve for the control of a quantity of gas to be supplied to a gas burner, having a direct pressure regulator which has a valve body that can be moved by an electronically controlled stepper motor.

Abstract: In prior art, one of the problems of equivalent switching MPLS packets is that the transmission of MPLS packets is defined unidirectionally. The inventive method provides a solution to the problem in the form of a configuration which allows for bidirectional and 1:n unidirectional transmission (requiring a reverse LAN channel). Equivalent switching operations in the case of an error occurring when a working entity fails are administered in an efficient manner according to priority criteria and MPLS link information.

Abstract: The invention relates to a low-effort monitoring method of the transmission quality of connections in MPLS networks. Specially configured MPLS-OAM packets (MPLS-OAM-LAV packets) are defined and are periodically inserted into the traffic flow of user data packets at the source of a connection or a partial section of a connection, said MPLS-OAM-LAV packets being distinguishable from other MPLS-OAM packets and the MPLS packets carrying user data by a special mark. The information part of the MPLS-OAM-LAV packets contains a field receiving the number of MPLS packets that have been sent within a given period of time. Said tally is read out at the reception end (acceptor) and is compared with the number of actual packets received for said connection within the given period of time. The result serves as a criterion for lost and/or erroneously added packets.

Abstract: The invention relates to a manner of integrating an OAM functionality into an MPLS network with little cost within MPLS networks. MPLS-OAM packets are thus provided. The above are added to the stream of useful data packets and are differentiated from the MPLS packets by means of a particular marking or code provided within the packet header.

Abstract: In the English translation document, please add the paragraph at page 22 line 1, after the newly added ABSTRACT section heading, as follows: The invention relates a suggestion how to provide support for equivalent circuit measures in MPLS networks, using simple means. An MPLS OAM functionality is defined, enabling connectivity and performance monitoring of an MPLS link. According to the invention, said MPLS OAM functionality is taken into account when providing support for MPLS equivalent circuit measures. Said approach is easy to use especially when no very quick switching times are required. A simple express protocol is also defined for quicker switching times.

Abstract: The invention relates to a low-effort method for monitoring the availability of connections in MPLS networks, according to which specially configured MPLS-OAM packets are defined and are periodically inserted into the traffic flow of user data packets at the source of a connection or a partial section of a connection, said specially configured MPLS-OAM packets being distinguishable from other MPLS-OAM packets and the MPLS packets carrying user data by means of a special mark or identifier. The specially configured MPLS-OAM packets are periodically checked for arrival thereof at the acceptor of the connection or the partial section of the connection. The connection is declared unavailable if none of said packets have been received within a predefined period of time.

Abstract: The invention relates to a manner of integrating an OAM functionality into an MPLS network with little cost within MPLS networks. MPLS-OAM packets are thus provided. The above are added to the stream of useful data packets and are differentiated from the MPLS packets by means of a particular marking or code provided within the packet header.

Abstract: The invention relates to a low-effort monitoring method of the transmission quality of connections in MPLS networks. Specially configured MPLS-OAM packets (MPLS-OAM-LAV packets) are defined and are periodically inserted into the traffic flow of user data packets at the source of a connection or a partial section of a connection, said MPLS-OAM-LAV packets being distinguishable from other MPLS-OAM packets and the MPLS packets carrying user data by a special mark. The information part of the MPLS-OAM-LAV packets contains a field receiving the number of MPLS packets that have been sent within a given period of time. Said tally is read out at the reception end (acceptor) and is compared with the number of actual packets received for said connection within the given period of time. The result serves as a criterion for lost and/or erroneously added packets.

Abstract: The aim of the invention is to carry out an examination of the connectivity of MPLS-links in MPLS-networks. Specially formed MPLS-OAM packets are introduced into the traffic flow of user data packets and are supplied to other communication devices along the link. Each respective OAM-ECHO packet is copied, intermediately stored and re-routed in said communication device. The copied and intermediately stored packet is then retransmitted in the reverse direction, in the direction of the source where all in-coming copies are registered until the OAM-ECHO-packet is either extracted in the OAM-sink or if a pre-determined time span has been exceeded. Using the received and/or non-received copied of said packets, it is possible to determine if the connectivity of the connections is guaranteed.

Abstract: In prior art, the provision of an equivalent circuit for ATM cells is efficiently controlled using linear structures. According to the invention, in order to also transit these structures to ring-type architectures, a ring-type structure is configured from linear structures as follows: additional linear structures are integrated into the transmission section of a linear structure and the switching devices of the original linear structure are combined. In addition, a large number of equivalent circuits share a common reserved transmission capacity.

Abstract: In prior art, the provision of back-up circuits for ATM cells in ring-type structures is efficiently controlled using linear structures. According to the invention, this function is extended to ring-type MPLS network architectures as follows: linear MPLS structures are formed into a ring-type MPLS structure and two unidirectional MPLS connections which respectively connect the same switching devices and run in opposite directions are logically associated to one another, whereby the operating link and the back-up link are routed via different physical paths.

Abstract: In prior art, the provision of back-up circuits for ATM cells in ring-type structures is efficiently controlled using linear structures. According to the invention, this function is extended to ring-type MPLS network architectures as follows: linear MPLS structures are formed into a ring-type MPLS structure and two unidirectional MPLS connections which respectively connect the same switching devices and run in opposite directions are logically associated to one another, whereby the operating link and the back-up link are routed via different physical paths.