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Signalling System No. 7 (SS7) is a set of telephony signaling protocols developed in the 1970s that is used to setup and teardown telephone calls on most parts of the global public switched telephone network (PSTN). The protocol also performs number translation, local number portability, prepaid billing, Short Message Service (SMS), and other ...
The Circuit Identification Code is used to specify which trunk between two switches is used to carry a particular call. Note that some versions of ANSI ISUP permit a CIC with 14 significant bits instead of the 12 that are shown. [8] The Message Type indicates the ISUP message type. The presence and form of the remaining 3 components are ...
The remaining components of the SS7 stack are all directly, or indirectly, MTP Users. Some examples of parts at Level 4 are SCCP , ISUP , TUP , and, in the UK, IUP . [ 7 ] The services provided to MTP Level 4 by the MTP (that is, MTP to MTP Users) is described in ITU-T Recommendation Q.701 .775148760
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2 Changes to SS7 Protocol diagram. 1 comment. Toggle the table of contents. Template talk: SS7 stack. Add languages. Page contents not supported in other languages.
INAP stands for Intelligent Network Application Protocol or Intelligent Network Application Part. It is the signalling protocol used in Intelligent Networking (IN). [ 1 ] It is part of the Signalling System No. 7 (SS7) protocol suite, typically layered on top of the Transaction Capabilities Application Part (TCAP).
Signalling System No. 7 (SS7/C7): Protocol, Architecture, and Services. Indianapolis: Cisco Press. ISBN 1-58705-040-4. sigtran.org - Archived SIGTRAN website. IEC Tutorial [1] - IEC SS7 over IP (SIGTRAN) protocols [dead] Sergey Puzankov, Dmitry Kurbatov: How to Intercept a Conversation Held on the Other Side of the Planet, 2014-05-22, Positive ...
These are realized using Intelligent Network Application Part (INAP) that sits above Transaction Capabilities Application Part (TCAP) on the SS7 protocol stack. The TCAP is part of the top or 7th layer of the OSI layer breakdown. SCPs are connected with either SSPs or STPs. This is dependent upon the network architecture that the network ...