Base transceiver station bts it is responsible for the wireless communication between mobile and its relevant network. It is a softwarebased system that operates independently of the voice transport itself the pstn. This means that, it sends the voice signal into digital form in packets rather than send it in digital form or analog circuits using a mobile phone company or conventional pstn acronym for public switched telephone network. Voip voice over internet protocol architecture and features. Access network, access technologies, broadband services and applications access network, c. Free of charge communication with emergency services should be provided from a, b, c, e. It involves three main subsystems, each containing functional units and interconnected with the others through a series of standard interfaces. Isp network design pop topologies and design backbone design addressing routing protocols. Voip voice over internet protocol is the technology for voice conversations with internet network or any ip.
These instruments were the beginning of the worldwide pstn. Pstn architecture overview 1 free online course materials. It is possible to use voicefrequency channels and digital channels of various. Pstn is a centuryold worldwide connected telephone network. For more information, see the article for this poster. Short for public switched telephone network, which refers to the international telephone system based on copper wires carrying analog voice data.
The public switched telephone network consists of the local and toll automatic exchanges, switching nodes, lines and channels of telephone. Databases hlr home location register vlr visitor location register eir equipment identity register network subsystem msc msc fixed partner networks iwf isdn pstn pspdn cspd n s s 7 eir hlr vlr isdn pstn. Learn about uc and its many layers, including terminals, applications, codecs, gateways, realtime protocols, and network operations, so you can integrate uc and voip into your business network. Pstn public switched telephone network pspdn packet switched public data net. The public switched telephone network voice over ip industry. Microsoft teams it architecture and telephony solutions. Chapter 4 91 chapter 4 9 pstn architecture 92 introduction in 1876,alexander graham bell patented the telephone and envisioned telephonys eventual triumph over the dominant communications network of his day.
Free tutorials on public switched telephone network. The structure of a gsm network relies on several functional entities, which have been specified in terms of functions and interfaces. Another term commonly used for it is pots, which stands for plain old telephone system, a nongeek way of naming the landline phone system that is being rapidly replaced by. This poster helps you decide which microsoft telephony solution phone system in the cloud or enterprise voice onpremises is right for users in your organization, and how your organization can connect to the public switched telephone network pstn. Today, as smartphones and mobile devices continue to proliferate, wireless telecom networks are taking up market share and pstn landline. Pdf network gateways are used to set up calls between the public switched telephone network pstn and the internet, but existing. Introduction to ss7 signaling this tutorial provides an overview of signaling system no.
Topic 1200 introduction to public switched telephone networks pstns pots, isdn, dlc, dsl, and pon technologies, systems and services. Digital endtoend digital subscriber loop q one set of interfaces for all services at multiple speeds q supports both circuit switching and. The pstn consists of telephone lines, fiber optic cables, microwave transmission links, cellular networks, communications satellites, and. Many communication technologies are based on those used in the public switched telephone network pstn, so regardless of whether youre interested in voice, data or networking, it is important to have an understanding of the structure and operation of the telephone network. Microsofts java are incompatible, their free availability minimizes much of the. In this course, well understand the public switched telephone network pstn, and plain ordinary telephone service pots. Calls originate and terminate in ip network, pass through scn ip network ip network local or distributed iwf function phase i phase 1 iwf local or distributed function h. The gsm network architecture wireless communication. Proposed network architectures white paper document code.
The public switched telephone network pstn is the aggregate of the worlds circuitswitched telephone networks that are operated by national, regional, or local telephony operators, providing infrastructure and services for public telecommunication. When you place a regular phone call using the public switched telephone network, also known as plain old telephone service you use whats called circuitswitched telephony. Another term commonly used for it is pots, which stands for plain old telephone system, a nongeek way of naming the landline phone system that is being rapidly replaced by newer digital and mobile providers. The msc provides connection to the public switched telephone network pstn. Ss7 is akin to tcpip in that it operates at several layers of the osi model. The bss communicates with the network service switching nss center across the a interface. A public switched telephone network is a combination of telephone networks used worldwide, including telephone lines, fiber optic cables, switching centers, cellular networks, satellites and cable systems.
Pdf an architecture for residential internet telephony service. The eo processes the customer service request locally or passes it off to the appropriate end or tandem office. Given below is a simple pictorial view of the gsm architecture. It controls calls to and from other telephone and data communications networks, including the public switched telephone networks pstn, integrated services digital networks isdn, public land mobile networks plmn and public data networks. Cellular concept several small cells instead of a single transmitter frequency reuse. Pon consists of optical line terminal olt, optical network unit onu and optical distribution network odn. Introduction to ss7 signaling this tutorial provides an overview of signaling system. In this chapter we discuss the architecture of the public switched telephone network pstn, the architecture of networks based on the h. Understanding the fundamentals of this technology and network architecture is the starting point for understanding everything else. The public switched telephone network consists of the local and toll automatic exchanges, switching nodes, lines and channels of telephone network and subscriber telephone terminals. Signaling system 7 ss7 definition signaling system 7 ss7 is an architecture for performing outofband signaling in support of the callestablishment, billing, routing, and informationexchange functions of the public switched telephone network pstn.
Global system for mobile communication technology mobile device investigations program technical operations division. Nov 19, 2018 in this article, we will look at pstn telephone networks in detail, covering all aspects, from basic setup and how the technology works to some of the reasons for the global decline in usage, along with an overview of some modern alternatives to pstn. The mobile switching center msc performs the telephony switching functions for the network. This base transceiver station is based on a radio and an antenna. Pstn customers connect to the endoffice eo for telecommunications services. The use of distributed network architecture pstn systems also. This gsm tutorial covers gsm basics, gsm architecture and gsm system features. In order that the gsm system operates together as a complete system, the overall network architecture brings together a series of data network identities, each with several elements. To date, it has been mostly deployed in the backbone and enterprise networks.
This is in contrast to newer telephone networks base on digital technologies, such as isdn and fddi telephone service carried by the pstn is often called plain old telephone service pots. Deploying voip as an endtoend nextgeneration network solution introduces additional constraints and issues discussed in section 5. Call from mobile phone to public switched telephone network pstn. Access network, access technologies, outline broadband. A pstn lets users make landline telephone calls to one another.
Understanding the fundamentals of this technology and network architecture is. A pstn network topology is the switching network topology of a telephone network connected to the public switched telephone network pstn in the united states and canada, the bell system network topology was the switching system hierarchy implemented and operated from the late 1940s to the 1980s for the purpose of integrating the diverse array of local telephone companies and telephone. Gsm is the short form of global system for mobile communications. The public switched telephone network is a global system that has developed over several decades. Show full abstract high rate network, the network state and control information is continuously conveyed to and from a central unit over an ultra lowlatency wireless network. In order to deploy a voip network that is capable of providing a pstn scale. Several large private telephone networks are not linked to the pstn, usually for military purposes. Networkwide intrusive and nonintrusive testmonitoring solutions. In this paper we will use network analysis to study the pstn. From the early research of alexander graham bell, telecommunications companies evolved the pstn architecture that provided for yesterdays landline voice communications. To understand how voip, short for voice over internet protocol, works, its helpful to compare it to how conventional phone calls operate.
Ss7 primarily sets up and tears down telephone calls, but other uses include number translation, prepaid billing mechanisms, local number portability, short message service sms, and a variety of massmarket services. Standardized digital techniques for switching and transmission t1 etc q 1980. All traffic types voice, digits, tones, fax, and modem all protocols hdlc, isdn, ss7, gsm, gprs, cdma 2000, trau, ppp, umts, frame relay, v5. The additional components of the gsm architecture comprise of databases and messaging systems functions. Pon consists of optical line terminal olt, optical network unit onu and optical distribution networkodn. Ss7 is a separate network whose duties are setting up, tearing down, monitoring, and routing calls on the pstn. Topic 1200 introduction to public switched telephone.
Of the communications networks, public switched telephone network. Its essential to include the pstn and its associated risks when examining voip security. Gsm network areas in a gsm network, the following areas are defined. The telephone network university of texas at dallas.
Sometimes called plain old telephone service pots, the ptsn is what enables you. Optical network unit passive optical splitter pstn internet iptv onu onu pon is a kind of passive optical network featuring onetomultiplepoint architecture. The public switched telephone network pstn is used for the landline telephone system. The pstn topology and class level might be different in different countries but the original design was only for circuit switching. Lisa bock compares the traditional public switched telephone network pstn to voip, and discusses the framework and components necessary for voip to. Microsoft cloud it architecture resources microsoft docs. Regional seminar on costs and tariffs for tal group member. The mobile station ms the base station subsystem bss the network switching subsystem nss the operation support subsystem oss given below is a simple pictorial view of the gsm architecture. High level network architecture showing the relationship between ip networks, pbx and pstn provider. The public switched telephone network pstn is the aggregate of the worlds circuitswitched. Jan 18, 2020 the public switched telephone network pstn is used for the landline telephone system. Each cell is given a cell global identity cgi, a number that uniquely identifies the cell. The msc provides connection to the public switched telephone network pstn and the integrated services digital network isdn. The gsm architecture consists of multiple network elements.
Nov 25, 2018 pstn is a centuryold worldwide connected telephone network. Free longdistance phone calls were the traditional motivation for consumer ip telephony, even. This basic tutorial on gsm architecture also covers gsm burst types, gsm frame structure, gsm channels, gsm physical layer and so on. Ss7 network architecture by telcoma global duration. Permanent te nt isdn switch subscriber or provider 64 kbps nonswitched 64 kbps switched 64 kbps ckt nonswitched 64 kbps ckt switched x. Content over view what is pstn evolution of pstn band width allocation numbering schemes call setup, signaling and switching. Public switched telephone networks free online course.
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