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Topic: PSTN

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	Public Switched Telephone Network - Wikipedia, the free encyclopedia
		The public switched telephone network (PSTN) is the concentration of the world's public circuit-switched telephone networks, in much the same way that the Internet is the concentration of the world's public IP-based packet-switched networks.
		The PSTN is largely governed by technical standards created by the ITU-T, and uses E.163/E.164 addresses (known more commonly as telephone numbers) for ooo addressing.
		The basic digital circuit in the PSTN is a 64-kilobits-per-second channel, originally designed by Bell Labs, called a "DS0" or Digital Signal 0.
	en.wikipedia.org /wiki/PSTN (637 words)

	Telefono: Tutte le informazioni su Telefono su Encyclopedia.it (Site not responding. Last check: 2007-11-06)
		Si tratta di una vera e propria centrale telefonica che adotta una specifica numerazione per i telefoni interni, di solito raggiungibile anche come derivazione dalla linea telefonica pubblica.
		Alcune tra le aziende più grandi utilizzano una propria rete anche tra le varie unità locali, in Italia anche la Pubblica Amministrazione e l'Esercito hanno una rete privata, dotata di gateway PSTN.
		Un telefono senza filo consiste in una base che è connessa alla linea telefonica e comunica per mezzo di onde radio con un apparecchio portatile.
	www.encyclopedia.it /t/te/telefono.html (1376 words)

	RFC 2303 (rfc2303) - Minimal PSTN address format in Internet Mail
		Minimal PSTN address The minimal specification of a PSTN address in e-mail address is as follows: pstn-address = pstn-mbox [ qualif-type1 ] pstn-mbox = service-selector "=" global-phone service-selector = 1*(DIGIT / ALPHA / "-") ; note that SP (space) is not allowed in ; service-selector.
		The e-mail address of the I-pstn device: mta-I-pstn An "I-pstn device" has an e-mail address, or to be more exact, a name which enables a mail system to identify it on the e-mail global system.
		Conclusions This proposal creates a minimal standard encoding for PSTN addresses within the global e-mail transport system and defines the standard extension mechanism to be used to introduce specific new elements.
	www.faqs.org /rfcs/rfc2303.html (1538 words)

	* PSTN - (Telecom): Definition (Site not responding. Last check: 2007-11-06)
		PSTN (Public Switched Telephone Network) - The network of equipment, lines, and controls assembled to establish communication paths between calling and called parties in North America...
		An exception to this rule are the low frequency bands which can follow the curvature of the earth,...
		Telephone system connecting subscribers to the Public Switched Telephone Network (PSTN) using radio signals rather than copper wire for part or all of the connection between the subscriber and the switch...
	en.mimi.hu /telecom/pstn.html (342 words)

	Pantek - Expert Linux and Open Source Services: : RFC #3372: Session Initiation Protocol for Telephones (Site not responding. Last check: 2007-11-06)
		In this flow, in order to seamlessly integrate the IP network with the PSTN, it is important to preserve the received SS7 information within SIP requests at the originating gateway and reuse this SS7 information when signaling to the PSTN at the terminating gateway.
		PSTN origination - PSTN termination: The originating gateway receives ISUP from the PSTN and it preserves this information (via encapsulation and translation) in the SIP messages that it transmits towards the terminating gateway.
		PSTN origination - IP termination: The originating gateway receives ISUP from the PSTN and it preserves this ISUP information in the SIP messages (via encapsulation and translation) that it directs towards the terminating SIP user agent.
	www.pantek.com /library/general/rfc/rfc3372.html (5098 words)

	Pstn - Encyclopedia.WorldSearch (Site not responding. Last check: 2007-11-06)
		Introduction to Public Switched Telephone Networks (PSTN), Local Loop, Switching, DSL, ATM, SS7, and AIN
		Converged Networks and Services: Internetworking IP and the PSTN
		PSTN Voice: Wireless and Value-Added May Stem a Long-Term Decline
	encyclopedia.worldsearch.com /pstn.htm (148 words)

	RFC 2458 (rfc2458) - Toward the PSTN/Internet Inter-Networking--Pre-PINT I
		Upon receiving the request and the associated data, the PSTN translates the data into the proper facsimile format and delivers it to the Beijing hotel as specified in the fax request.
		The PSTN is used to deliver calls between terminals connected to itself or to other PSTNs with which it is interconnected.
		Calls on the PSTN are circuit switched; that is, a bi-directional connection is made between the calling and called terminals for the duration of the call.
	www.faqs.org /rfcs/rfc2458.html (14947 words)

	First Generation Tenor Command Reference P5.2.1 - PSTN Trunk Group Prompt Commands
		It should be noted that even though the trunk is related to the PSTN, it is not necessary that this trunk contain a line and/or channels that are connected to a PSTN.
		Depending on the application, this trunk group may actually be associated with the PBX interface instead of the PSTN.
		The main difference between this prompt and commands and those of the PBX trunk group are that you configure the hop-off or LAM patterns here (numbers that come in from the IP and "hop-off" to the PSTN saving long distance and international toll charges).
	www.quintum.com /support/1G/sysdoc/webhelp/pstn_trunk_group_prompt_commands.htm (253 words)

	PSTN - FAQ - Shared dedicated co-location hosting
		The main distinctions between PSTN and non-PSTN services are speed and bandwidth.
		PSTN generally delivers about 52 Kbps (52,000 bits per second).
		It started with human-operated, analogue, circuit-switching systems (called plugboards) and has evolved into electromechanical switches so that the transmission is completely digital-except for the final connection to the subscriber (the "last mile") which is why Internet users are opting for DSL, an always-on connection with better speed.
	www.exxzero.com /faq/pstn (191 words)

	Voice Service Interworking for PSTN and IP Networks
		The PSTN core network is based on a circuit-switched network where each circuit corresponds to a 64 kb/s digital channel.
		Standard phone sets are attached to the PSTN by means of an analog access network, which merely corresponds to the set of subscriber loops (the copper wires that link the customers to the central office).
		While the PSTN network ensures a fixed delay and no-loss guaranteed service, this is not necessarily the case for IP-based networks.
	www.comsoc.org /ci/private/1999/may/Hamdi.html (5794 words)

	Mixing PSTN traffic on Partial Private Circuit infrastructure - 18 October 2002
		The Director accepts that in the case of CSI PSTN Muxes, as these Muxes are dedicated to a specific OLO and located in its premises, re-use in the same location is extremely difficult and the cost of moving and re-deploying them in other parts of the network is too high.
		Thus the Director had to assess the share of the PSTN infrastructure costs that are included in the charges paid by the OLOs for PSTN interconnect circuits from the information available from the intra-building charges for the last 5 years.
		This reduction is meant to reflect the fact that the Director believes that CSI PSTN Muxes cannot easily be re-used and, thus, BT should be allowed to recover their costs from all PSTN interconnect circuits independently of the Muxes on which they terminate.
	www.ofcom.org.uk /static/archive/oftel/publications/broadband/leased_lines/ppc1002.htm (9414 words)

	broadband » Forums » Voice over IP » PSTN.....is going to Die!
		Those PSTN phones will be excellent interfaces to the technology for a while until the wireless phone systems turn into custom local PBXs.
		PSTN is not an efficient communications delivery method which dooms it to death eventually.
		PSTN will be around for a very long time, in some form.
	www.dslreports.com /forum/remark,10739304~mode=flat (1404 words)

	Microsoft Internet Security & Acceleration Server (ISA) 2000 - Public switched telephone network (PSTN) call ...
		The public switched telephone network (PSTN) is a standard, circuit-switched network that is optimized for real-time voice communication.
		The PSTN guarantees quality of service (QoS) by dedicating the circuit to your call until you disconnect.
		All users are able to make calls to PSTN numbers by using NetMeeting to dial the number from their desktops.
	www.microsoft.com /resources/documentation/isa/2000/enterprise/proddocs/en-us/isadocs/gk_scen_ip-pstn.mspx (198 words)

	PSTN_Lifeline (Site not responding. Last check: 2007-11-06)
		PSTN lifelines allows you to have VoIP phone service and PSTN phone service at the same time.
		Yes, p2002L allows you to make outgoing PSTN call via a prefix number that is defined in the configurable lifeline table.
		If p2002 lost power it will by pass to PSTN line to allow you to call out as you where on regular PSTN phone.
	www.zyxel.com /support/supportnote/p2002/faq/PSTN_Lifeline.htm (314 words)

	CommsDesign - MoIP: Making PSTN Modems Work on IP Networks (Site not responding. Last check: 2007-11-06)
		The maturity of the PSTN and associated modem technology has created a stable environment where modem performance is reliable over the full suite of PSTN impairments.
		PSTN impairments are essentially noise superimposed on the modem signal.
		The signal quality may vary dramatically on the PSTN but the delay is constant and the signal is always present.
	www.commsdesign.com /design_corner/OEG20030312S0017 (1945 words)

	IEC: Advancing the All-Packet Network
		An integral part of the PSTN, the Class-5 switch is an extremely complex and expensive piece of equipment that resides within the local exchange or central office (CO).
		Another major component within the PSTN is the Class-4 tandem switch, which is responsible for intermediate connection of trunk lines between the station originating the call and the destination.
		Implied within these major PSTN facility descriptions is that, regardless of where on the network the particular component resides, increased load stresses each element's capability and capacity—the more unplanned the load or stress, the more problematic for the carrier and the more likely that facility will become a network hot spot.
	www.iec.org /online/tutorials/all_packet/topic03.html (524 words)

	Communications Solutions (TM) Feature Article (Site not responding. Last check: 2007-11-06)
		So, although the PSTN can be expanded to support the growing volume of data traffic, the lower return on data traffic has forced service providers to look to less expensive alternatives for supporting data services.
		This data "tsunami" is threatening to increase congestion and degrade the reliability of the PSTN.
		The cost structure and technological limitations of the PSTN are key drivers of the next-generation network; this new converged network will far surpass the PSTN in terms of the ability to take advantage of new profitable revenue streams while reducing cost structure and time-to-market for new services.
	www.tmcnet.com /scripts/print-page.aspx?PagePrint=http://www.tmcnet.com/comsol/1201/1201flu.htm (2076 words)

	PSTN (Public Switched Telephone Network): Teledatacom Glossary
		PSTN (public switched telephone network) is the world's collection of interconnected voice-oriented public telephone networks, both commercial and government-owned.
		Today, it is almost entirely digital in technology except for the final link from the central (local) telephone office to the user.
		In relation to the Internet, the PSTN actually furnishes much of the Internet's long-distance infrastructure.
	www.artesyncp.com /resources/glossary/pstn.html (151 words)

	ENERGY INTELLECT \| PSTN Communications Devices
		Energy Intellect offers two PSTN data modem models that are optimised for use with our TMA series of poly-phase electronic meters.
		The CMP2000 connects to a public service telephone network (PSTN) by means of an RJ45 connector located on the side of the modem.
		Ideal for network metering applications where multiple TMA meters are networked together (up to 32 meters) using RS485 connected to a single CMP4200 PSTN data modem.
	www.energyintellect.com /html/comms_PSTN.html (196 words)

	SPA-3000 Frequently Asked Questions (FAQ) (Site not responding. Last check: 2007-11-06)
		You may be able to request your PSTN Company to provide signal 1-3 to your phone service for better performance.
		By default PSTN -> VoIP and VoIP -> PSTN are configured to use the same Dialplan 1.
		Pls note that PSTN line needs to be registered to a service provider and this call will only use the service provider defined in PSTN line, not Line1.
	www.sipura.com /support/spa3000faq/Section_2.html (2031 words)

	SPA-3000 Frequently Asked Questions (FAQ) (Site not responding. Last check: 2007-11-06)
		If PSTN caller id is not available, the user-id and display name configured for the PSTN Line's VoIP account will be used instead.
		A: You can use specify a dial plan to be used by the default PSTN caller with a hot line syntax: (S0) where voip_number is replaced with the actual phone number (or sip url) of the VoIP destination.
		When PSTN ring stops, the SPA will take a few seconds to realize that the ring has truly stopped (due to some quiet period between rings), before it can tear down the corresponding internal SIP call to Line 1.
	www.sipura.com /support/spa3000faq/Section_4.html (904 words)

	PSTN_Lifeline (Site not responding. Last check: 2007-11-06)
		Lifeline means the ability to read specified emergency rescue authority (Police, Fire department etc.) as you can do on regular phone line in case emergency even if P2602HWL loses power.
		Yes, P2602HWL allows you to make outgoing PSTN call via a prefix number that is defined in the configurable lifeline table.
		If P2602HW lost power it will by pass to PSTN line to allow you to call out as you where on regular PSTN phone.
	www.zyxel.com /support/supportnote/p2602hw/faq/PSTN_Lifeline.htm (314 words)

	PSTN and Analog Testing
		It emulates both the PSTN access devices and core networks by generating and routing voice calls with PSTN signaling.
		Abacus family (Abacus 5000, Abacus 100, Abacus 50 Analog, Abacus 50 T1/E1 and Abacus1) is the industry-leading bulk call generator for thorough load and functional test.
		Whether the environment is IP telephony, wireless communications, PSTN or converged networks, Abacus provides meaningful reports on voice quality, jitter and delay, as well as fax / modem transmission analysis.
	www.spirentcom.com /analysis/technology.cfm?WS=13&SS=177 (1274 words)

	SMS on PSTN (Site not responding. Last check: 2007-11-06)
		This protocol is used to send SMS on a fixed line to another entity connected on a PSTN or GSM networks.
		The SMS over PSTN system is already running in a several countries around the world.
		SMS over PSTN lines do exist, we use it to connect a standard S7-300 Siemens PLC with a normal PSTN modem to send SMS messages with alarms,etc...
	www.edaboard.com /ftopic69379.html (246 words)

	Our community VoIP to PSTN Service
		All of the revenue generated by the use of our Inbound PSTN to VoIP numbers has been pooled to a central community "pot" for the benefit of this community.
		We have developed a backend software system running on our servers which allows this pot to be used by members, via our SIP server and PSTN gateway, to make outbound calls on their SIP phones (whether software or hardware).
		We are not in control of this, and it does not generate any additional revenue for this community where those providers are over-charging.
	www.voipuser.org /forum_topic_328.html (865 words)

	Fusion Developer's Manual (6378-13): PSTN Interface Control
		Since switching between the AG-RT daughterboard and TX board is set up during the application initialization process (refer to Section 5.3.1 for details), data is automatically directed from AG TRAU channels to TX virtual ports (through the MVIP bus).
		Note: For G.711 AG TRAU programs, three channels of audio data are received from the PSTN side of the gateway (on three timeslots), but this data is sent to the packet network side of the gateway on four MVIP timeslots.
		If an incoming call (from either the PSTN or packet network interface) requires a specific type of encoder/decoder, the gateway application must be ready to switch the call to an appropriate AG TRAU program.
	www.nmscommunications.com /manuals/6378-13/chap4.htm (3157 words)

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