2 bicc cs2 and signalling system no 7 isdn user part general funtions of messages and parameters định nghĩa các bản tin tham số và thông tin báo hiệu được sử dụng bởi giao thức bicc và isup
Signaling System No.7 Protocol Architecture And Sevices part 2 ppt
... techniques and systems However, for the past two decades, it has been replaced with Common Channel Signaling (CCS) systems Apart from a rare trace of Signaling System No (SS6) signaling, System No (SS7) ... information regarding the CCITT, see Chapter 2, "Standards." Table 1-1 Tones Used to Create DTMF Signals 120 9 Hz 1336 Hz 1 477 Hz 1633 Hz 6 97 Hz A 77 0 Hz B 8 52 Hz C 941 Hz * # D The fourth column (1633 ... and called party is typically addressed in North American non-residential systems (PBX systems) by using ground start rather than loop start Other countries often employ a simple technique known...
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Signaling System No.7 Protocol Architecture And Sevices part 3 pps
... 4000 Hz) This is known as out -of- band signaling and is used in R2 for supervisory signaling Unlike with in-band signaling, no contention exists between user traffic and signaling North America uses ... for supervisory signaling in analog CAS-based systems North America used a frequency of 26 00 Hz (1600 Hz was previously used), and Great Britain used 22 80 Hz (as defined in British Telecom's SSAC15 ... signal, and indicates the end of address digits by sending the ST (end pulsing) signal The timing of MF signals is a nominal 60 ms, except for KP, which has a nominal duration of 100 ms A nominal...
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Signaling System No.7 Protocol Architecture And Sevices part 4 potx
... documented standard(s) Testing is normally performed by an independent organization Quite often this happens to be a department of an incumbent or private company that has been spun off C7/SS7 testing ... single link can control thousands of voice circuits, so if a link fails and no alternative routes are found, thousands of calls could be lost There is no inherent testing of speech path by call set-up ... SS7 does not run in non-associated mode because no procedures exist for reordering out -of- sequence messages Associated and quasi-associated signaling modes assure sequential delivery, while non-associated...
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Signaling System No.7 Protocol Architecture And Sevices part 6 docx
... ISDN, SS7/C7, and V5 It is described in Chapter 14, "SS7 in the Converged World." The Sigtran architecture is defined in RFC 27 19, Framework Architecture for Signalling Transport Other RFCs and ... private, nonprofit membership organization supported by a diverse constituency of private-sector and public organizations ANSI's T1 committee is involved in the standardization of SS7 These standards ... companies and their operating company subsidiaries, known as Regional Bell Operating Companies (RBOCs) Bellcore was the research and development arm of the former Bell System (the "baby Bells") operating...
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Signaling System No.7 Protocol Architecture And Sevices part 7 potx
... which SS7/C7 establishes a call behind the scenes This process is further discussed in Chapter 8, "ISDN User Part (ISUP) ." 2nd and 3rd Generation Cellular Networks Cellular networks use SS7/C7 for ... in the SS7 software of an AT&T switching node rippled through over 100 switching nodes The failure caused a nine-hour outage, affecting an estimated 60,000 people and costing in excess of 60 million ... reason, the SS7/C7 network has been designed to be extremely robust and resilient Impact of SS7 Network Failure The critical nature of the SS7 network and the potential impact of failures was...
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Signaling System No.7 Protocol Architecture And Sevices part 8 potx
... 2, "Standards," for more information on standards-making bodies Signaling System No is more commonly known by the acronyms SS7 and C7 Strictly speaking, the term C7 (or, less commonly, CCS7) refers ... any Signaling System No protocol, regardless of its origin or demographics An overview of SS7 by the ITU-T can be found in recommendation Q .70 0 [111], and a similar overview of SS7 by ANSI can ... in T1.110 [1 12] Chapter 3, "The Role of SS7," provides a comprehensive list of the functions and services afforded by SS7 These can be summarized as follows: • • • • • • Setting up and tearing...
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Signaling System No.7 Protocol Architecture And Sevices part 9 potx
... MTP2, MTP3, and TUP, first publication 1984 CCITT Red Book MTP2, MTP3, and TUP revised SCCP and ISUP added 1988 CCITT Blue Book MTP2, MTP3, TUP, and ISUP revised ISUP supplementary services and ... transfer of SS7 messages between other SS7 nodes, acting somewhat like a router in an IP network An STP is neither the ultimate source nor the destination for most signaling messages Generally, messages ... Additionally, standalone STPs often can screen SS7 messages, acting as a firewall Such usage is described in Chapter 15, "SS7/C7 Security and Monitoring." An STP can exist in one of two forms: • • Standalone...
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Signaling System No.7 Protocol Architecture And Sevices part 10 pot
... TUP with ISUP Both North America and Japan bypassed TUP and went straight from earlier signaling systems to ISUP ISUP supports both POTS and ISDN calls It also has more flexibility and features ... to help in the discussion and presentation of the SS7 protocol stack Levels 1, 2, and correspond to MTP 1, 2, and 3, respectively Level refers to an MTP user The term user refers to any protocol ... the SS7 network Figure 4-19 shows the relationship between levels 1, 2, and Figure 4-19 A Single MTP3 Controls Many MTP2s, Each of Which Is Connected to a Single MTP1 TUP and ISUP TUP and ISUP...
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Signaling System No.7 Protocol Architecture And Sevices part 11 doc
... class office up through the class office Each class of traffic aggregation points contained a smaller number of offices Table 5-1 lists the class categories and office types used in the Bell System ... interconnection between local End Offices and serves as a primary point of access for IXCs Trunks are the facilities that connect all of the offices, thereby transporting inter-nodal traffic InterExchange ... does not require an investment in last mile wiring Pre-Divestiture Bell System Hierarchy Vestiges of terminology relating to network topology remain in use today from the North American Bell System' s...
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Signaling System No.7 Protocol Architecture And Sevices part 12 pot
... — 6 72 51.840 OC-3 STS-3 STM-1 20 16 155. 520 OC- 12 STS- 12 STM-4 8064 622 .080 OC-48 STS-48 STM-16 32, 256 24 88. 320 OC-96 STS-96 STM- 32 64,5 12 4 976 .64 OC-1 92 STS-1 92 STM-64 129 , 024 9953 .28 0 OC -76 8 ... signal before transmitting over the loop The emergence of voice over IP (VoIP) has prompted the use of other voiceencoding standards, such as ITU G. 72 3 , G. 72 6 , and ITU G. 72 9 These encoding methods ... SS7 messages easily for outbound calls over SS7 signaled trunks TIP For U.S networks, the Telcordia TR-444 (Generic Switching Systems Requirements Supporting ISDN access using the ISDN User Part) ...
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Signaling System No.7 Protocol Architecture And Sevices part 14 potx
... voice and in-band signaling View b shows the SS7 topology using simple associated signaling for all nodes View c shows the actual SS7-enabled PSTN topology The existing switching nodes and facilities ... examine a specific SS7/C7 protocol layer This chapter details the Layer protocol, which is known as Message Transfer Part (MTP2) MTP2 corresponds to OSI Layer (the data link layer) and as such is the ... are also common to LSSUs and MSUs MTP2 adds the fields at the originating signaling point and processes and removes them at the destination signaling point (an adjacent node) Figure 6-1 FISU Format...
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Signaling System No.7 Protocol Architecture And Sevices part 15 docx
... size of a transmitted SU to 27 9 octets ( 27 2 maximum SIF size plus seven for MTP2 overhead and the SIO) NOTE In ANSI networks, when 1.536-Mbps links are used, a 9-bit length indicator is used, and ... length for an MSU as 27 9 octets If the MSU size is greater than 62 octets, the LI is set to the value of 63; therefore, an LI of 63 means that the SIF length is between 63 and 27 2 octets This situation ... positive acknowledgment, cyclic retransmission, forward error correction system This means that no negative acknowledgments are used and that the system relies on the absence of a positive acknowledgment...
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Signaling System No.7 Protocol Architecture And Sevices part 16 pps
... MTP3 The FIB and the BIB of the LSSUs are set to 1, and the FSN and BSN are set to 1 27 Not Aligned When MTP2 receives an order to begin initial alignment, the SP changes the status of the transmitted ... octet counting mode if an SU fails the acceptance procedure (seven or more consecutive 1s, length is not a multiple of bits, or SU length is not between and 27 9 octets) For every block of N octets ... LSSUs to indication SIO (out of alignment) and starts the timer T2 If T2 expires, the status of the transmitted LSSUs reverts to SIOS Aligned During T2 SIO, if SIN (normal alignment) or SIE (emergency...
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Signaling System No.7 Protocol Architecture And Sevices part 17 pot
... and circuit-related messages) 0111 Data User Part (facility registration and cancellation messages) 1000 Reserved for MTP Testing User Part 1001 Broadband ISDN User Part 1010 Satellite ISDN User ... Testing and Maintenance Messages 0010 Signaling Network Testing and Maintenance Special Messages (ANSI) or Spare (ITU-T) 0011 SCCP 0100 Telephone User Part 0101 ISDN User Part 0110 Data User Part ... based on the internal routing tables The SLS code is used for load sharing MTP3 User Part messages across links and linksets The originating node generates a bit pattern and places it in this field...
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Signaling System No.7 Protocol Architecture And Sevices part 18 doc
... details of ISUP at the moment— only the fact that an SSP A User Part (ISUP) needs to communicate via MTP3 with an SSP B User Part (ISUP) SSP A is setting up a call to SSP B and needs to send an ISUP ... Point Code 20 0-1 -2 does not match the point code of the current STP, and has therefore passed the message to the routing function The routing table is searched for a match for DPC 20 0-1 -2, and a match ... differently Figure 7- 9 Routing Table Lookup ANSI Network and Cluster Routing Routing is often performed in a hierarchical fashion In ANSI networks, messages can be routed by matching only part of the DPC...
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Signaling System No.7 Protocol Architecture And Sevices part 19 ppsx
... TRA messages to each of the connected STPs and notifies the user parts of routing status Figure 7- 34 MTP Restart Management Inhibiting Signaling link management inhibiting is used to prevent user ... signal the end of the routing update T20 is stopped or expired Send TRA messages to all adjacent nodes Notify local MTP users of the routing status of routesets maintained by the node STP MTP Restart ... T18 and T20 Update routing tables based on TFP, TFR, and TFA messages from adjacent nodes Each adjacent node sends TRA to signal the end of the routing update T18 is stopped or expires TFP and...
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Signaling System No.7 Protocol Architecture And Sevices part 20 potx
... using MTP3 and SCCP for transport ISUP Standards and Variants The ITU-T defines the international ISUP standards in the Q .76 7 and the national standards in the Q .76 1–Q .76 4 series of specifications ... the national ISUP variants: • • ETSI ETS 300- 121 Integrated Services Digital Network (ISDN) ; Application of the ISDN User Part (ISUP) of CCITT Signaling System No for international ISDN interconnections ... Specification of Signaling System No 7, Volume (ISUP) Telcordia GR-3 17 LSSGR— Switching System Generic Requirements for Call Control Using the Integrated Services Digital Network User Part (ISDNUP)...
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Signaling System No.7 Protocol Architecture And Sevices part 21 pps
... two parties who are involved in a telephone conversation For example, the originating party is also known as the calling party, or the "A" party The terminating party, or "B" party, are also synonymous ... talking state For an ordinary call that does not involve special services, no additional ISUP messages are exchanged until one of the parties signals the end of the call by going on-hook Call Release ... period ITU Q .76 4 defines the ISUP timers and their value ranges In Figure 8-3, part A includes the timers for the messages that are presented for a basic call The "Continuity Test" section of this...
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Signaling System No.7 Protocol Architecture And Sevices part 22 pptx
... Continuity testing can be considered part of the ISUP maintenance functions It can be invoked to test trunks manually, as part of routine maintenance and troubleshooting procedures Continuity testing ... variable subfields have not been expanded All of the ISUP Message formats and parameters are documented in ITU-T Q .76 3 ANSI T1.113 documents the North American version of the messages Initial Address ... example, an IAM, ACM, and so on) Mandatory Fixed Part Required message parameters that are of fixed length Mandatory Variable Part Required message parameters that are of variable length Each...
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Signaling System No.7 Protocol Architecture And Sevices part 23 ppsx
... terminating exchange to the originating exchange This indicates that the terminator is being alerted NOTE Note that the terminating office does not always send the ring-back tone For example, ISDN ... details of how each mechanism is implemented also vary from country to country The following section provides a general understanding of NP and how it affects the ISUP call flow and messages ... line When the two parties are connected over an interexchange ISUP trunk, suspend and resume messages are used to maintain the trunk connection until the on-hook party has gone off-hook Terminal...
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