Signaling System No 7 Protocol Architecture And Sevices part 51 doc

... set of SS7 parameters and parameter values that uniquely define the range of signaling traffic to be handled by a particular Application Server. Parameters within the Routing Key cannot extend ... of a SG. • Signaling Gateway (SG)— An SG is a signaling agent that receives/sends SCN native signaling at the edge of the IP network. An SG appears to the SS7 network as an SS7 Signa...

Ngày tải lên: 02/07/2014, 09:20

... and Systems TR-41 User Premises Telecommunications Requirements TR-45 Mobile and Personal Communications Systems Standards Technology Association (TTA—Korea), and Telecommunication Technology ... consensus standards system. It provides a neutral forum to develop p olicies on standards issues and to serve as an oversight body to the standards development and conformity assess...

Ngày tải lên: 02/07/2014, 08:21

... fundamental view of how the PSTN works, particularly in the areas of signaling and digital switching. SS7 provides control signaling for the PSTN, so you should understand the PSTN infrastructure to ... SSPs provide the SS7 functionality of a switch. STPs may be either standalone or integrated STPs (SSP and STP) and are used to transfer signaling messages. SCPs interface the...

Ngày tải lên: 02/07/2014, 08:21

... (PCR) method is a noncompelled, positive acknowledgment, cyclic retransmission, forward error correction system. This means that no negative acknowledgments are used and that the system relies ... missing) MSU and all subsequent MSUs. This method uses both negative and positive acknowledgments. Positive acknowledgments (ACKs) indicate the correct reception of an MSU, and neg...

Ngày tải lên: 02/07/2014, 08:21

... the User Parts at level 4 of the SS7 protocol, like ISUP and SCCP. The term "MTP User Part& quot; is also used, but more specifically refers to the User Parts at level 4. When a node generates ... receives a message and the discrimination function determines that the message is not for that node, the message is discarded because these nodes do not have transfer capability. A U...

Ngày tải lên: 02/07/2014, 08:21

... element encoding is based on the ITU X.680 and X.690 ASN.1 standards. Many of the SS7 standards reference the older versions of these documents (X.208 and X.209). The ASN.1 provides a means of ... Application Context Name and, optionally, Protocol Version and User Information. It is used to request dialogue information from another node, such as the context between the nodes (wh...

Ngày tải lên: 02/07/2014, 08:21

... Transaction ID, there is no way for the sending node to handle the error because it cannot make an association with the appropriate transaction. Errors at the Component Layer Protocol errors at ... Begin message is received and the Originating Transaction ID cannot be determined because of the message error, the message is simply discarded and an Abort message is not returned to...

Ngày tải lên: 02/07/2014, 08:21

... changes require a lot of noncircuit- related signaling, particularly if the subscriber is currently engaged in a call—the subscriber should not be aware that such handovers between cellular ... databases, known as the Home Location Register (HLR) and the Visitor Location Register (VLR), in addition to the cellular-specific switch known as the MSC. For a description of the nodes used .....

Ngày tải lên: 02/07/2014, 09:20

... forwardAccessSignaling message. Figure 13-4. Direction of processAccessSignaling and forwardAccessSignaling prepareSubsequentHandover If another inter-MSC is required (back to MSC-A or to another ... as inter-MSC handover: basic inter-MSC handover and subsequent inter-MSC handover. A basic inter-MSC handover is where the call is handed from the controlling MSC (MSC-A) to another...

Ngày tải lên: 02/07/2014, 09:20