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In mobile telecommunications network routing, E.214 is one of three prevailing numbering plans used for delivering mobility management related messages. [1]The E.164 numbering plan, which is a maximum of 15 digits and usually written with a "+" prefix, is the historic first-generation format representing the phone number.
An SS7 probe is a physical device to obtain signalling and/or bearer information from a telecommunications network, such as the PSTN or a corporate telephone system. The probe passively monitors the E1 / T1 or SDH / SONET bearer channels, and extracts the signalling information for onward presentation to an application.
The diagram to the right depicts a simplified call flow for a successful submission of a mobile-originated Short Message (SM). [ 1 ] When the subscriber sends a Short Message, the handset sends the text message over the air interface to the Mobile Switching Center (MSC) / Serving GPRS Support Node (SGSN) .
This indirect connection is called quasi-associated signaling, which reduces the number of SS7 links necessary to interconnect all switching exchanges and SCPs in an SS7 signaling network. [ 12 ] SS7 links at higher signaling capacity (1.536 and 1.984 Mbit/s, simply referred to as the 1.5 Mbit/s and 2.0 Mbit/s rates) are called high-speed links ...
The Message Transfer Part (MTP) is part of the Signaling System 7 (SS7) used for communication in Public Switched Telephone Networks. MTP is responsible for reliable, unduplicated and in-sequence transport of SS7 messages between communication partners. MTP is formally defined primarily in ITU-T recommendations Q.701, Q.702, Q.703, Q.704 and Q.705.
Although MTP provides routing capabilities based on the Point Code, SCCP allows routing using a Point Code and Subsystem number or a Global Title.. A Point Code is used to address a particular node on the network, whereas a Subsystem number addresses a specific application available on that node.
The design of SS7 was influenced by the 6K, an electric locomotive model imported from Japan. [1] The first SS7 was built in 1992 in Datong. In 1997, SS7s were used in Nanning-Kunming Railway. However, SS7's frequent failure lead to Datong Electric Locomotive Works making improvements to SS7s. Failure was reduced to just four cases in one year ...
The global title is similar in purpose on the PSTN to the host name on the Internet.In design, however, global titles are quite different. The structure is usually hierarchical, the value can be of variable length, and is not necessarily a wholly numeric value—though it often is for issues of backward compatibility and association with regular telephone numbers.