Abstract: Method, apparatus and computer program for storing by a database server a plurality of data entries containing data related to a plurality of applications. The database server receives a request to modify the content of a data entry and checks a validation rule related to the entry before performing the modification. The validation rule contains information usable for determining valid data contents that can be stored in said entry, and information for building the validation rule is received from one or more application servers serving said applications. When a back end database server system stores data related to a plurality of applications, data validation check mechanisms are simplified, as information for performing validity checks are received from the application servers in the database system.

Abstract: Asynchronous data samples are received from a plurality of data channels for distribution onto a plurality of data processors each having a plurality of processing-slots. The identity of a channel from which a sample is received is determined using a channel ID associated with the sample. A time-stamp is assigned to at least one sample from each respective channel. Finally, at least one time-stamped sample is assigned to a processing-slot such that the separation between the time-stamp and a nearest time-stamp of at least one sample assigned to at least one other processing-slot of each respective processor is maximized.

Abstract: The present invention relates to an arrangement and a method for echo cancellation wherein only telecommunications traffic (s6) of a downlink (3), for which echo cancellation is performed, passes through an echo canceller function (1′). Traffic (s5) of an uplink (2) is forwarded via a switch (15) to a near end (B) without passing through the echo canceller function (1′). A signal copy (s9) of traffic (s5) of the uplink is created by the switch (15) and directed to the echo canceller function (1′) in order to serve as a base for an estimated echo signal (e′). The estimated echo signal (e′) is subtracted from the traffic (s6) of the downlink, which is input to the echo canceller function (1′), so as to create an output signal (s8), which is substantially free from echo. The invention makes it possible to reduce the processing capacity required in connection with echo cancellation and provides for a decreased delay of traffic of the uplink (2).

Abstract: A system and method for optimizing network resources in an ATM network wherein existing virtual channel connections (“VCCs”) are checked for an available channel identifier (“CID”) and network bandwidth in response to a connection request. If a CID and required bandwidth is not available, then a new VCC is established and the requested AAL2 connection is setup. Rather than establishing a new direct VCC, available resources on an indirect VCC may be used.