Abstract: Loops via which a signalling point communicates with itself are advantageous for solving various problems. According to the invention, a loop is enabled by a link that is returned in a loop from a signalling point to the same signalling point and to which two different signalling network identities are allocated at the output and input side.

Abstract: A node, which supports enhanced link sets, which includes two signaling point codes such that one of the signaling point codes is used to identify functions and MTP users which can make full use of a longer and unsegmented message length (i.e., in excess of 255 octets) which heretofore had to be segmented before being delivered to link sets supporting only messages according to Q.703.

Abstract: Many communication protocols require a control circulation between transmitter and receiver such that the receiver is capable of controlling the transmission rate of the transmitter. This is frequently accomplished by communicating a transmission window. Inventively, the transmitter is informed of the currently desired transmission window even without the presence of message losses and without an explicit request on the part of the transmitter.

Abstract: Operators of transfer points in the signalling network number 7 wish, on the one hand, to protect themselves against unauthorized use; on the other hand, these operators want to require fees for the use of the STP. The present invention solves this demand in a simple way in that it unites MTP charging with incoming linkset/DPC (desination point code) screening such that the accounts and their respective sub-accounts could be managed according to the evaluations of the covered traffic.

Abstract: A method and apparatus in which specific properties of individual signalling links in a signalling network are utilized without all signalling link sets having to have these specific properties. A fixed allocation is provided between a signalling link having the specific properties and a specific value of the signalling a signalling message.

Abstract: The transmission of signaling information between network nodes connected to one another ensues in separate signaling channels. A signaling protocol corresponding to a broadband ISDN layer model is respectively defined for such signaling information. Among other things, an ATM adaption layer (S-AAL) is defined therein which, in addition to having a general adaption sub-layer (AAL5), also has two service-specific sub-layers (SSCOP, SSCF) available to it. One of these service-specific sub-layers (SSCF) is thereby modified, as compared to ITU Recommendation Q.2140, each that, for a call set up, a communication over the respective signaling channel occurs between two network nodes connected to one another without a previous check of the transmission link.