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Signaling End Point
In telecommunications, a Signaling End Point (SEP) is an SS7 endpoint. This is to be contrasted with a Signal Transfer Point (STP). Examples include: *Intelligent Network components such as Service Control Points (SCPs) and Service Switching Points (SSPs) *Telephone exchanges implementing Telephone User Part (TUP) or ISDN User Part (ISUP) *Mobile Switching Center Network switching subsystem (NSS) (or GSM core network) is the component of a GSM system that carries out call out and mobility management functions for mobile phones roaming on the network of base stations. It is owned and deployed by mob ...s implementing MAP References Signaling System 7 {{telephony-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telecommunications
Telecommunication is the transmission of information by various types of technologies over wire, radio, optical, or other electromagnetic systems. It has its origin in the desire of humans for communication over a distance greater than that feasible with the human voice, but with a similar scale of expediency; thus, slow systems (such as postal mail) are excluded from the field. The transmission media in telecommunication have evolved through numerous stages of technology, from beacons and other visual signals (such as smoke signals, semaphore telegraphs, signal flags, and optical heliographs), to electrical cable and electromagnetic radiation, including light. Such transmission paths are often divided into communication channels, which afford the advantages of multiplexing multiple concurrent communication sessions. ''Telecommunication'' is often used in its plural form. Other examples of pre-modern long-distance communication included audio messages, such as code ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Signaling System 7
Signalling System No. 7 (SS7) is a set of telephony signaling protocols developed in 1975, which is used to set up and tear down telephone calls in most parts of the world-wide public switched telephone network (PSTN). The protocol also performs number translation, local number portability, prepaid billing, Short Message Service (SMS), and other services. The protocol was introduced in the Bell System in the United States by the name ''Common Channel Interoffice Signaling'' in the 1970s for signalling between No. 4ESS switch and No. 4A crossbar toll offices. In North America SS7 is also often referred to as ''Common Channel Signaling System 7'' (CCSS7). In the United Kingdom, it is called ''C7'' (CCITT number 7), ''number 7'' and ''Common Channel Interoffice Signaling 7'' (CCIS7). In Germany, it is often called ''Zentraler Zeichengabekanal Nummer 7'' (ZZK-7). The SS7 protocol is defined for international use by the Q.700-series recommendations of 1988 by the ITU-T. Of the m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Communication Endpoint
A communication endpoint is a type of communication network node. It is an interface exposed by a communicating party or by a communication channel. An example of the latter type of a communication endpoint is a publish-subscribe topic or a group in group communication systems. See also *Node (networking) * Terminal (telecommunication) * Connection-oriented communication *Data terminal equipment Data terminal equipment (DTE) is an end instrument that converts user information into signals or reconverts received signals. These can also be called tail circuits. A DTE device communicates with the data circuit-terminating equipment (DC ... * Dial peer * End system * Host (network) References Computing terminology Telecommunications {{compu-network-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Signal Transfer Point
A Signal Transfer Point (STP) is a node in an SS7 network that routes signaling messages based on their destination point code in the SS7 network. It works as a router that relays SS7 messages between ''signaling end-points'' (SEPs) and other signaling transfer points (STPs). Typical SEPs include ''service switching points'' (SSPs) and ''service control points'' (SCPs). The STP is connected to adjacent SEPs and STPs via signaling links. Based on the address fields of the SS7 messages, the STP routes the messages to the appropriate outgoing signaling link. Edge STPs can also route based upon message body content using deep packet inspection techniques, and can provide address translations and screen content to limit the transfer of messages with dubious content or sent from unreliable sources. To meet stringent reliability requirements, STPs are typically provisioned in mated pairs. These 'routers' are connected just by signaling links; they do not have users attached (where a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intelligent Network
The Intelligent Network (IN) is the standard network architecture specified in the ITU-T Q.1200 series recommendations. It is intended for fixed as well as Global System for Mobile Communications, mobile telecommunication, telecom networks. It allows operators to differentiate themselves by providing value-added services in addition to the standard telecom services such as PSTN, ISDN on fixed networks, and GSM services on Mobile phone, mobile phones or other mobile devices. The intelligence is provided by network nodes on the service layer, distinct from the telephone exchange, switching layer of the core network, as opposed to solutions based on intelligence in the core telephone exchange, switches or equipment. The IN nodes are typically owned by telecommunications service providers such as a telephone company or mobile phone operator. IN is supported by the Signaling System 7, Signaling System #7 (SS7) protocol between network switching centers and other network nodes owned by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Service Switching Point
In telephony, a service switching point (SSP) is the telephone exchange that initially responds, when a telephone caller dials a number, by sending a query to a central database called a service control point (SCP) so that the call can be handled. The service switching point uses the Signalling System No. 7 (SS7) protocols which are responsible for the call setup, management, and termination with other service switching points. Relationship between SSP and SCP With the introduction of the Intelligent Network architecture, service functionality (e.g. UK translation of 0800 non-geographic telephone numbers) is being removed from the actual telephone exchange and devolved out into other computer nodes. In this new architecture, the telephone exchange is known as an SSP and the node that contains the services (and hence ''controls'' the progression of a call) is known as service control point (SCP). Example of a 0800 number translation service In the UK 08XXX numbers are non-geograph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telephone User Part (TUP)
Telephone User Part (TUP) provides conventional PSTN telephony services across the Signalling System No. 7 (SS7) network. TUP was the first layer 4 protocol defined by the standards bodies and as such did not provision for ISDN services. It has now largely been replaced by ISUP. However, it can still be found in operational use in some parts of the world (e.g., China). TUP is defined in ITU-T Recommendations Q.721-725. These define the international telephone call control signalling functions for use over SS7. Various national variants of TUP have evolved, some of which provide varying degrees of support for ISDN Integrated Services Digital Network (ISDN) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the digitalised circuits of the public switched telephone network. Wo .... E.g. French SSUTR2 and Chinese TUP (Specification GF001-9001). Signaling System 7 Integrated Services Digital Netw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ISDN User Part
The ISDN (Integrated Services Digital Network) User Part or ISUP is part of Signaling System No. 7 (SS7), which is used to set up telephone calls in the public switched telephone network (PSTN). It is specified by the ITU-T as part of the Q.76x series.. When a telephone call is set up from one subscriber to another, several telephone exchanges could be involved, possibly across international boundaries. To allow a call to be set up correctly, where ISUP is supported, a switch will signal call-related information like called party number to the next switch in the network using ISUP messages. The telephone exchanges may be connected via T1 or E1 trunks which transport the speech from the calls. These trunks are divided into 64 kbit/s timeslots, and one timeslot can carry exactly one call. Regardless of what facilities are used to interconnect switches, each circuit between two switches is uniquely identified by a circuit identification code (CIC) that is included in the ISUP mess ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mobile Switching Center
Network switching subsystem (NSS) (or GSM core network) is the component of a GSM system that carries out call out and mobility management functions for mobile phones roaming on the network of base stations. It is owned and deployed by mobile phone operators and allows mobile devices to communicate with each other and telephones in the wider public switched telephone network (PSTN). The architecture contains specific features and functions which are needed because the phones are not fixed in one location. The NSS originally consisted of the circuit-switched core network, used for traditional GSM services such as voice calls, SMS, and circuit switched data calls. It was extended with an overlay architecture to provide packet-switched data services known as the GPRS core network. This allows mobile phones to have access to services such as WAP, MMS and the Internet. Mobile switching center (MSC) Description The mobile switching center (MSC) is the primary service delive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mobile Application Part
The Mobile Application Part (MAP) is an SS7 protocol that provides an application layer for the various nodes in GSM and UMTS mobile core networks and GPRS core networks to communicate with each other in order to provide services to users. The Mobile Application Part is the application-layer protocol used to access the Home Location Register, Visitor Location Register, Mobile Switching Center, Equipment Identity Register, Authentication Centre, Short message service center and Serving GPRS Support Node (SGSN). Facilities provided The primary facilities provided by MAP are: * Mobility Services: location management (to support roaming), authentication, managing service subscription information, fault recovery, * Operation and Maintenance: subscriber tracing, retrieving a subscriber's IMSI * Call Handling: routing, managing calls whilst roaming, checking that a subscriber is available to receive calls * Supplementary Services * Short Message Service * Packet Data Pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
