Abstract: The invention relates to a method and device for simple and efficient determining characteristics during a transition between an AAL2 signalling protocol and at least one another signalling protocol of at least one communication network. The inventive method and device are characterised in that at least one characteristic is determined on the basis of parametric values assigned to the AA2 signalling protocol and in that the determined characteristics are used for reproducing the parametric values of the AA2 signalling protocol in the parametric values of another signalling protocol.

Abstract: The invention discloses removal of ATM cells from an ATM communications device. A first algorithm is provided by means of which, with the exception of a first and a last ATM cell in a frame, all newly arriving cells in the frame are removed. A second algorithm is provided by means of which all the ATM cells in a frame, from a first cell to a last cell, are removed on arrival in a queue from the ATM communications device. At a start of a transmission process, a user indicates a maximum number of ATM cells per frame, and the ATM cells using the number are transmitted when the maximum number is exceeded, the associated frame is discarded or the first algorithm is used. The invention solves this problem by defining rules whose application results in this method now being used only to a very limited extent.

Abstract: The invention discloses removal of ATM cells from an ATM communications device. A first algorithm is provided by means of which, with the exception of a first and a last ATM cell in a frame, all newly arriving cells in the frame are removed. A second algorithm is provided by means of which all the ATM cells in a frame, from a first cell to a last cell, are removed on arrival in a queue from the ATM communications device. At a start of a transmission process, a user indicates a maximum number of ATM cells per frame, and the ATM cells using the number are transmitted when the maximum number is exceeded, the associated frame is discarded or the first algorithm is used. The invention solves this problem by defining rules whose application results in this method now being used only to a very limited extent.

Abstract: In an ATM communication system or communication terminal the cell loss priority information (CLP) in operation, maintenance, administration and resource-management cells (OAM) that are inserted between cells (DP1, DP2) of a virtual connection (GFR-Vx) with a guaranteed frame rate, is detected by determining the cell loss priority information (CLP) of the cell (DP1) of the respective virtual connection (GFR-Vx) which is actually to be transmitted and by inserting said information in the operation, maintenance, administration and resource-management cells (OAM).

Abstract: A method for removal of ATM cells (2, 6) from an ATM communications device wherein ATM cells (2, 3, 5, 6) are respectively allocated in pluralities to a common frame (8, 9), whereby all ATM cells (2 . . . 6) of a frame (9) whose first ATM cell (2) is in the waiting list (1) are removed from a waiting list (1) for the administration of a sequence of ATM cells (2, 3, 4, 5, 6). The method makes it possible to quickly and efficiently create space for cells having a higher priority in the ATM communications device.

Abstract: The invention relates to a method and device for simple and efficient determining characteristics during a transition between an AAL2 signalling protocol and at least one another signalling protocol of at least one communication network. The inventive method and device are characterised in that at least one characteristic is determined on the basis of parametric values assigned to the AA2 signalling protocol and in that the determined characteristics are used for reproducing the parametric values of the AA2 signalling protocol in the parametric values of another signalling protocol.

Abstract: An efficient reduction for the time delay during echo correction in a telecommunications network is made possible by a method for reducing an echo in uplink data (19 to 22) that are issued from a terminal (2, 3) of a telecommunications network (6, 8). A copy (25) of downlink data is created from downlink data (13) that are to be transmitted from the telecommunications network (6, 8) toward the terminal (3). Said copy (25) of downlink data is converted (transcoder 18) and used for the reduction (10) of echo in uplink data (21), whereas downlink data (13) are transmitted (6) toward the terminal (2, 3).

Abstract: The invention discloses removal of ATM cells from an ATM communications device. A first algorithm is provided by means of which, with the exception of a first and a last ATM cell in a frame, all newly arriving cells in the frame are removed. A second algorithm is provided by means of which all the ATM cells in a frame, from a first cell to a last cell, are removed on arrival in a queue from the ATM communications device. At a start of a transmission process, a user indicates a maximum number of ATM cells per frame, and the ATM cells using the number are transmitted when the maximum number is exceeded, the associated frame is discarded or the first algorithm is used. The invention solves this problem by defining rules whose application results in this method now being used only to a very limited extent.

Abstract: A method for aligning packet loss priority information for overload control of a data-packet-switching communications device wherein data packets and respectively allocated packet loss priority information are transmitted to the communications device and buffered in relation to a specific connection. The packet loss priority information is then read from the buffered data packets and modified according to the connection type or the application-specific data traffic type. After the data packet has been switched in the communications device, the original packet loss priority information which was switched with the data packets is re-inserted into the corresponding data packet.

Abstract: The invention relates to a data conversion method whereby a packet-based data transfer is converted into a data transfer which is synchrronised in time slots, and packets are stored in a conversion buffer memory (3). According to the invention, a packet is rejected at the end of a time interval (Tx) if, during the time interval Tx, the number of data packets never falls below a threshold value t>0 in the conversion buffer memory (3). The invention also relates to a data conversion system.

Abstract: Efficient adjustment of tones and announcements are equalized in the conversation of a mobile radio telephone subscriber by a common air interface (4) enabling an exchange to occur between several transmission modes characterized by different compression of said conversation. This is achieved by means of a device and a method for adjusting an acoustic sequence (11; 12; 13; 14; 15; 16; 17; 18) in the speech channel of a common air interface (4) for a subscriber (2) of a mobile radio telephone network (4, 3, 5). According to the invention, a transmission mode (A; B; C) which is to be used on the speech channel can be selected (3,5) from several transmission modes defined by differing degrees of compression of speech sequences (8) of the subscriber (2) on the common air interface. An adjustable acoustic sequence is stored in several compression data sets (11, 12, 13, 14, 15, 16, 17, 18) whose compression respectively corresponds to the compression of at least one of the transmission modes (A; B; C:).

Abstract: A decision algorithm for discarding frames is disclosed. A method is disclosed including the application of rules which results in the limited use of the Partial Packet Discard (PPD) method and results in the ATM cells which are not assigned to a frame not being discarded. According to the described Early Packet Discard (EPD) system, all the cells in a frame, from the first cell to the last cell, are removed from an ATM communications device upon arrival in a queue. The EPD system results in no residual cells remaining from a damaged frame or from a frame which is to be removed for other reasons. Additionally, each connection has a Maximum Frame Size (MFS), which is measured in cells and depends on the connection. Thus, increased space is available for other ATM cells.

Abstract: In VBR connections, control cells are inserted into the stream of ATM cells. These control cells are fed back to the transmitting device. In order to allow control to be carried out efficiently, the stream of ATM cells associated with the VBR connections is measured and is supplied to a control method. The result of this control method is then, if required, entered in the information portion of control cells that are transmitted back.

Abstract: The method proposed in ITU-I.371.1 for the individualized-connection determination of the currently allowed transmission rate of ATM cells is inventively realized with the assistance of list parameters, whereby the list parameters indicate the plurality of current intermediately stored transmission rates and their size relationship relative to one another. As a result of this, a more efficient utilization of the computer resources of the ATM communication devices is achieved, as is a greater flexibility in view of the processing sequence of the individual method steps.

Abstract: In ABR connections, control cells are inserted into the stream of ATM cells. These control cells are returned to the transmission means. In order to be able to implement an efficient control, the stream of ATM cells belonging to ABR connections is measured and supplied to a control procedure. The result of this control procedure is then potentially entered into the information part of the returned control cells.

Abstract: In the transmission of ATM cells, there is often the requirement to: This measurement is usually implemented within a fixed time interval but this can be problematical insofar as this type of measurement leaves the type of connection out of consideration. The invention alleviates this situation in that the traffic characteristic of the ATM cells functions as the criterion for when a measurement is to be implemented.

Abstract: In a method and circuit arrangement for forwarding message cells supplied by an ATM communication equipment unit, a peak bit rate as well as an upper limit for an average bit rate and a burst tolerance are determined as characteristic parameters for at least a part of the virtual connections proceeding via the ATM communication equipment. For forwarding the message cells belonging to these virtual connections, a minimum delay time by which the forwarding of a message cell is at least delayed is calculated according to the criterion of the plurality of message cells incoming and outgoing per time unit during the course of the respective virtual connection, taking the peak bit rate into consideration.

Abstract: During the course of virtual connections, message cells are transmitted via the ATM communication equipment (KE) working according to an asynchronous transfer mode and are forwarded to a serving trunk (A1, . . . , An) coming into consideration for the respective virtual connection. Characteristic parameters corresponding to the traffic characteristic of the message cell stream to be transmitted are thereby determined for the respective virtual connection during the course of the call setup. Based on the criterion of these characteristic parameters, a time interval for the forwarding of a message cell to the serving trunk coming into consideration is determined for every message cell transmitted via the ATM communication equipment. It is thereby provided that the time interval for the respective message cell is only determined with the forwarding of a message cell of the same virtual connection that immediately precedes it.

Abstract: Disclosed is a method of removing silicone rubber encapsulating material from micro-electronic circuits. The encapsulant is broken down molecularly and removed by a solution of tetramethyl-ammonium hydroxide which is diluted with an alcohol such as 2-propanol. It was found that this stripping solution causes minimal swelling of the encapsulant and leaves no significant residue which cannot be removed by standard rinsing.

Abstract: Disclosed is a method for encapsulating selected areas of solid state integrated circuits. The areas which are to remain uncoated are covered with a water and/or alcohol soluble polymer of sufficient viscosity to form stable droplets. The encapsulant is then applied, usually by flow coating, and cured. The polymer mask is removed by applying a material such as water or alcohol which does not affect the encapsulant. The method thus allows relatively small areas to be masked without any significant residue left on the circuit.