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CCS messages provide for transaction-based services and for call control signaling between network nodes. The architecture for a CCS network is generally based on the geographical location of signaling points, the number and sizes of signaling points, the expected traffic load, and the services to be
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A CCS network provides signaling message transfer for participating Common
Channel Signaling Switching Offices (CCSSOs), databases, and operator systems. It is a packet-switched communication network that allows call control and transaction messages from the voice and data networks to be transferred
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Signaling
Gateway - Responsible for exchanging SS7 messages over a set of links from an SS7 node in a Voice Over Packet (VOP) network to a traditional PSTN network and encapsulating the user information (either ISUP for call setup or SCCP/TCAP for service related signaling) contained in the message
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Providers of
Interconnecting CCS networks and other interconnecting networks need information about the processes and interfaces that need to be supported to ensure that call originations routed via other interconnecting networks receive at least the same quality of service as intranetwork calls.
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contains this important information and includes information for providers of Legacy
Network Gateway and Legacy Selective Router Gateway systems to support the delivery of emergency calls between legacy origination networks and IP-enabled PSAPs, as well as emergency calls routed via Emergency
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As CCS networks have continued to evolve, and network interconnection architectures and the services they support have grown more complex, it has become necessary to identify the type of behavior all network providers are expected to exhibit when specific requirements do not exist.
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Service
Control Point (SCP) - An SEP that acts as a database to provide information to another SEP, e.g., a Service Switching Point (SSP) or another SCP, for processing and/or routing certain types of network
224:. SS7 is primarily used within the PSTN. The two signaling methods are very similar since they share a common heritage and in some cases, the same signaling messages are transmitted in both ISDN and SS7.
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Common
Channel Signaling Network Interface Specification (CCSNIS) Supporting Network Interconnection, Message Transfer Part (MTP), and Integrated Services Digital Network User Part (ISDNU),
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Common
Channel Signaling Network Interface Specification (CCSNIS) Supporting Network Interconnection, Message Transfer Part (MTP) and Integrated Services Digital Network User Part (ISDNU)
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Services IP Networks (ESInets) and legacy PSAPs that are served by
Selective Routers. It provides explicit references to ANSI and ATIS Standards and ITU-T Recommendations.
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Signaling Point (SP) - An SP transmits, receives, and processes CCS(SS7) messages. An SP can be a
Signaling End Point (SEP) or a Signaling Transfer Point (STP).
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Internet Call Router (ICR) - Also called the
Internet Offload, the ICR is a new network element used in the “post-switch" off-load architecture.
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Combined Link Set - A collection of link sets from a signaling node over which message traffic to a given destination is shared.
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Signaling Transfer Point (STP) - An SP that performs message routing functions and provides switching of messages between SEPs.
157:(PSTN) one channel of a communications link is typically used for the sole purpose of carrying signaling for establishment and
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A-Link Concentrator (ALC) - An SP that has the Message Transfer Part (MTP) functionality of an STP and also serves as a CCSSO.
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Regardless of the type of architecture selected, the CCS network will consist of a combination of the following components:
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via a separate channel than that used for the messages, The signaling channel usually controls multiple message channels.
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Signaling End Point (SEP) - An SP, other than an STP, with the ability to serve as a source or a sink for CCS messages.
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is sufficient to handle the call setup and call clear-down traffic for numerous bearer (voice and data) channels.
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Greater trunking efficiency due to the quicker set up and clearing, thereby reducing traffic on the network
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165:. The remaining channels are used entirely for the transmission of voice messages. In most cases, a single
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Signaling Link - A communication path between two adjacent Signaling Points (SPs) in the CCS network.
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Can transfer additional information along with the signaling traffic, providing features such as
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Link Set - A set of signaling links that connects the same pair of adjacent signaling points.
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Combined Node (CN) – An SP that combines the functions of two or more types of SPs.
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on communications paths that are separate from the voice and data connections.
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CCS offers the following advantages over CAS, in the context of the PSTN:
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Switch - An SEP that is equipped to switch end user voice or data calls.
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179:(CAS), in which each bearer channel has a dedicated signaling channel.
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ISDN signaling is used primarily on trunks connecting end-user
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434:(1st ed.). Indianapolis: Howard W. Sams & Co., Inc.
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46:. Unsourced material may be challenged and removed.
324:(2nd ed.). John Wiley and Sons. p. 111.
318:John G. Van Bosse and Fabrizio U. Devetak (2007).
267:for distribution to the Call Control Agent (CCA).
205:The most common CCS signaling methods in use are
1543:
432:Introduction to Digital Communications Switching
430:Ronayne, John P. (1986). "The Digital Network".
283:
348:Computer science and communications dictionary
344:
465:
1480:Global telecommunications regulation bodies
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106:Learn how and when to remove this message
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398:
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321:Signaling in telecommunication networks
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351:. Vol. 2. Springer. p. 245.
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1526:
175:The technical alternative to CCS is
132:common-channel interoffice signaling
44:adding citations to reliable sources
15:
207:Integrated Services Digital Network
201:Signaling can be performed mid-call
13:
14:
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228:Common channel signaling networks
155:public switched telephone network
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1115:Free-space optical communication
20:
31:needs additional citations for
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1:
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1552:Telecommunications standards
1501:Telecommunication portal
1282:Telecommunications equipment
284:Interconnecting CCS networks
177:channel-associated signaling
7:
1018:Alexander Stepanovich Popov
10:
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722:Telecommunications history
55:"Common-channel signaling"
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1330:Public Switched Telephone
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1142:telecommunication circuit
1103:Fiber-optic communication
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848:Francis Blake (telephone)
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643:Optical telecommunication
487:
237:provided by the network.
1241:Orbital angular-momentum
678:Satellite communications
517:Communications satellite
304:
124:common-channel signaling
1120:Molecular communication
943:Gardiner Greene Hubbard
772:Undersea telegraph line
507:Cable protection system
345:Martin H. Weik (2000).
218:private branch exchange
211:Signalling System No. 7
142:of control information
1262:Communication protocol
1048:Charles Sumner Tainter
863:Walter Houser Brattain
808:Edwin Howard Armstrong
616:Information revolution
1236:Polarization-division
968:Narinder Singh Kapany
933:Erna Schneider Hoover
853:Jagadish Chandra Bose
833:Alexander Graham Bell
564:online video platform
1078:Vladimir K. Zworykin
1038:Almon Brown Strowger
1008:Charles Grafton Page
663:Prepaid mobile phone
591:Electrical telegraph
40:improve this article
1028:Johann Philipp Reis
787:Wireless revolution
749:The Telephone Cases
606:Hydraulic telegraph
220:(PBX) systems to a
1226:Frequency-division
1203:Telephone exchange
1073:Charles Wheatstone
1003:Jun-ichi Nishizawa
978:Innocenzo Manzetti
913:Reginald Fessenden
648:Optical telegraphy
481:Telecommunications
296:Telcordia GR-905,
120:telecommunications
1557:Telephony signals
1539:
1538:
1277:Store and forward
1272:Data transmission
1186:Network switching
1137:Transmission line
983:Guglielmo Marconi
948:Internet pioneers
813:Mohamed M. Atalla
782:Whistled language
358:978-0-7923-8425-0
331:978-0-471-66288-4
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1370:Notable networks
1360:Wireless network
1300:Cellular network
1292:Types of network
1267:Computer network
1154:Network topology
1068:Thomas A. Watson
923:Oliver Heaviside
908:Philo Farnsworth
883:Daniel Davis Jr.
858:Charles Bourseul
818:John Logie Baird
527:Data compression
522:Computer network
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1098:Coaxial cable
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1013:Radia Perlman
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888:Donald Davies
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717:Smoke signals
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695:Semiconductor
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554:Digital media
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57: –
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52:
51:Find sources:
45:
41:
35:
34:
29:This article
27:
23:
18:
17:
1213:Multiplexing
1088:Transmission
1053:Nikola Tesla
1043:Henry Sutton
998:Samuel Morse
928:Robert Hooke
893:Amos Dolbear
828:John Bardeen
747:
727:Telautograph
631:Mobile phone
586:Edholm's law
569:social media
502:Broadcasting
431:
412:
406:
399:Ronayne 1986
393:
386:Ronayne 1986
380:
373:Ronayne 1986
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140:transmission
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76:
69:
62:
50:
38:Please help
33:verification
30:
1413:NPL network
1125:Radio waves
1063:Alfred Vail
973:Hedy Lamarr
958:Dawon Kahng
918:Elisha Gray
878:Yogen Dalal
803:Nasir Ahmed
737:Teleprinter
601:Heliographs
209:(ISDN) and
1546:Categories
1459:Antarctica
1418:Toasternet
1340:Television
823:Paul Baran
755:Television
739:(teletype)
732:Telegraphy
710:transistor
688:Phryctoria
658:Photophone
636:Smartphone
626:Mass media
423:References
138:), is the
96:March 2019
66:newspapers
1443:Americas
1432:Locations
1403:Internet2
1164:Bandwidth
868:Vint Cerf
765:streaming
743:Telephone
683:Semaphore
574:streaming
197:caller ID
167:64 kbit/s
159:tear down
146:signaling
1511:Category
1398:Internet
1388:CYCLADES
1305:Ethernet
1255:Concepts
1179:terminal
1130:wireless
953:Bob Kahn
796:Pioneers
621:Internet
512:Cable TV
411:GR-905,
1531:Commons
1521:Outline
1474:Oceania
1393:FidoNet
1378:ARPANET
1191:circuit
760:digital
489:History
213:(SS7).
186:Faster
170:channel
153:In the
80:scholar
1469:Europe
1439:Africa
1423:Usenet
1383:BITNET
1320:Mobile
1196:packet
705:MOSFET
700:device
497:Beacon
438:
355:
328:
263:calls.
130:), or
82:
75:
68:
61:
53:
1452:South
1447:North
1408:JANET
1345:Telex
1335:Radio
1174:Nodes
1169:Links
1090:media
668:Radio
653:Pager
581:Drums
547:video
542:image
532:audio
305:Notes
87:JSTOR
73:books
1464:Asia
1350:UUCP
1310:ISDN
436:ISBN
353:ISBN
326:ISBN
136:CCIS
59:news
1355:WAN
1325:NGN
1315:LAN
596:Fax
537:DCT
161:of
128:CCS
118:In
42:by
1548::
122:,
1482:)
1478:(
473:e
466:t
459:v
444:.
397:(
384:(
371:(
361:.
334:.
148:)
144:(
134:(
126:(
109:)
103:(
98:)
94:(
84:·
77:·
70:·
63:·
36:.
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