Call from mobile phone to public switched telephone network pstn. 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 msc provides connection to the public switched telephone network pstn. The bss communicates with the network service switching nss center across the a interface. The mobile switching center msc performs the telephony switching functions for the network. Microsoft cloud it architecture resources microsoft docs. For more information, see the article for this poster. 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. Pstn architecture overview 1 free online course materials. 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.
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. 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. Ss7 network architecture by telcoma global duration. In this course, well understand the public switched telephone network pstn, and plain ordinary telephone service pots. Gsm network areas in a gsm network, the following areas are defined. Nov 25, 2018 pstn is a centuryold worldwide connected telephone network. Access network, access technologies, broadband services and applications access network, c. This base transceiver station is based on a radio and an antenna. In order to deploy a voip network that is capable of providing a pstn scale. A pstn lets users make landline telephone calls to one another. Pstn public switched telephone network pspdn packet switched public data net. The public switched telephone network voice over ip industry.
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. 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. 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. Microsoft teams it architecture and telephony solutions. Introduction to ss7 signaling this tutorial provides an overview of signaling system no. Sometimes called plain old telephone service pots, the ptsn is what enables you. Cellular concept several small cells instead of a single transmitter frequency reuse. 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. It is a softwarebased system that operates independently of the voice transport itself the pstn. Ss7 is akin to tcpip in that it operates at several layers of the osi model.
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. This gsm tutorial covers gsm basics, gsm architecture and gsm system features. Pstn is a centuryold worldwide connected telephone network. Short for public switched telephone network, which refers to the international telephone system based on copper wires carrying analog voice data. Introduction to ss7 signaling this tutorial provides an overview of signaling system. Ss7 is a separate network whose duties are setting up, tearing down, monitoring, and routing calls on the pstn. Pstn customers connect to the endoffice eo for telecommunications services. Access network, access technologies, outline broadband. 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. 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. Gsm tutorial gsm is a globally accepted standard for digital cellular communications. Today, as smartphones and mobile devices continue to proliferate, wireless telecom networks are taking up market share and pstn landline.
Given below is a simple pictorial view of the gsm architecture. Isp network design pop topologies and design backbone design addressing routing protocols. Voip voice over internet protocol architecture and features. Free of charge communication with emergency services should be provided from a, b, c, e. Several large private telephone networks are not linked to the pstn, usually for military purposes. 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. The public switched telephone network pstn is the aggregate of the worlds circuitswitched. The public switched telephone network is a global system that has developed over several decades. The use of distributed network architecture pstn systems also. Microsofts java are incompatible, their free availability minimizes much of the. Its essential to include the pstn and its associated risks when examining voip security. From the early research of alexander graham bell, telecommunications companies evolved the pstn architecture that provided for yesterdays landline voice communications. Proposed network architectures white paper document code. High level network architecture showing the relationship between ip networks, pbx and pstn provider.
It involves three main subsystems, each containing functional units and interconnected with the others through a series of standard interfaces. The gsm network architecture wireless communication. Free longdistance phone calls were the traditional motivation for consumer ip telephony, even. These instruments were the beginning of the worldwide pstn. Regional seminar on costs and tariffs for tal group member.
Gsm is the short form of global system for mobile communications. In this chapter we discuss the architecture of the public switched telephone network pstn, the architecture of networks based on the h. 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. The public switched telephone network consists of the local and toll automatic exchanges, switching nodes, lines and channels of telephone. The gsm architecture consists of multiple network elements. Content over view what is pstn evolution of pstn band width allocation numbering schemes call setup, signaling and switching. The public switched telephone network pstn is used for the landline telephone system. Optical network unit passive optical splitter pstn internet iptv onu onu pon is a kind of passive optical network featuring onetomultiplepoint architecture. Pdf network gateways are used to set up calls between the public switched telephone network pstn and the internet, but existing. Pon consists of optical line terminal olt, optical network unit onu and optical distribution networkodn. Deploying voip as an endtoend nextgeneration network solution introduces additional constraints and issues discussed in section 5. This basic tutorial on gsm architecture also covers gsm burst types, gsm frame structure, gsm channels, gsm physical layer and so on. Voip voice over internet protocol is the technology for voice conversations with internet network or any ip.
Each cell is given a cell global identity cgi, a number that uniquely identifies the cell. 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. Standardized digital techniques for switching and transmission t1 etc q 1980. Free tutorials on public switched telephone network. Networkwide intrusive and nonintrusive testmonitoring solutions. Understanding the fundamentals of this technology and network architecture is. 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 additional components of the gsm architecture comprise of databases and messaging systems functions.
Topic 1200 introduction to public switched telephone. Public switched telephone networks free online course. The eo processes the customer service request locally or passes it off to the appropriate end or tandem office. Topic 1200 introduction to public switched telephone networks pstns pots, isdn, dlc, dsl, and pon technologies, systems and services.
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. 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. 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 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. In 1886, this 50line magneto switchboard, made by bell telephone of canada, was used to switch voice calls in small localities.
The pstn consists of telephone lines, fiber optic cables, microwave transmission links, cellular networks, communications satellites, and. In this paper we will use network analysis to study the pstn. 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. Pdf an architecture for residential internet telephony service. To understand how voip, short for voice over internet protocol, works, its helpful to compare it to how conventional phone calls operate. 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. Lisa bock compares the traditional public switched telephone network pstn to voip, and discusses the framework and components necessary for voip to. The telephone network university of texas at dallas. The structure of a gsm network relies on several functional entities, which have been specified in terms of functions and interfaces. Permanent te nt isdn switch subscriber or provider 64 kbps nonswitched 64 kbps switched 64 kbps ckt nonswitched 64 kbps ckt switched x. The msc provides connection to the public switched telephone network pstn and the integrated services digital network isdn. It is possible to use voicefrequency channels and digital channels of various. The pstn topology and class level might be different in different countries but the original design was only for circuit switching.
Understanding the fundamentals of this technology and network architecture is the starting point for understanding everything else. Jan 18, 2020 the public switched telephone network pstn is used for the landline telephone system. Of the communications networks, public switched telephone network. Pon consists of optical line terminal olt, optical network unit onu and optical distribution network odn. To date, it has been mostly deployed in the backbone and enterprise networks.