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Topic: Digital telephony

	Telephony Magazine Digital Edition - April 23, 2007
		Telephony Magazine Digital Edition - April 23, 2007 - Wireless (Page 22)
		Telephony Magazine Digital Edition - April 23, 2007 - Wireless (Page 23)
		Digital edition of Telephony Magazine Digital Edition - April 23, 2007 provided by Texterity, Inc.
	www.telephony-digital.com /telephonymagazine/20070423 (704 words)

	Digital Phone Systems - VoIP - Digital Telephony
		Hence, digital telephony is a means of bridging two distinct networks: the high speed data transmission provided by Cable TV or your local phone company.
		Digital Telephony has nothing to do with using your regular analogue telephone through a standard phone service, even if you subscribe to DSL or have high-speed internet access.
		Digital to Digital: Digital to digital telephone communications occur when both parties are using a broadband internet line to communicate from a digital network using VoIP.
	www.gizmocafe.com /handhelds/digital-phone-systems.aspx (964 words)

	Digital Telephony: Sending High-Speed Data Over Phone Lines
		In other words, a digital signal is either on or off; present or absent; 1 or 0; all or nothing.
		Their main function is to adapt the digital data stream produced by the customer equipment to the signaling standards of the telephone carrier equipment, and vice versa.
		The digital signals produced by customer devices (with throughput less than 56 kbps) are asynchronous, which means each byte is distinguished by start and stop bits, and the time interval between bytes varies.
	bg.ecmweb.com /ar/electric_digital_telephony_sending (1809 words)

	Welcome to Spectrum Communications!
		Spectrum is committed to providing cost effective and feature-rich telephony solutions using the latest available technology, while accommodating a customer's legacy system.
		Our telephony consultants have the necessary industry certifications and experience to assess the effectiveness of an existing system, and then determine whether a system upgrade or a replacement is warranted.
		Digital Telephony systems are affordable and flexible and give small to medium enterprises access to feature-rich call processing, toll-quality voice communication and all the productivity-enhancing benefits of an Ethernet LAN in a single converged network.
	www.spectrumccsi.com /telephony.htm (182 words)

	Telephony - Wikipedia, the free encyclopedia
		In telecommunication, Telephony (IPA pronunciation: [tə'lɛfəˌni]) encompasses the general use of equipment to provide voice communication over distances.
		Rapid advancement in digital electronics is revolutionizing telephony by providing alternate means of voice communication than that provided by traditional telephone systems.
		IP Telephony is a modern form of telephony which uses the TCP/IP protocol popularized by the internet to transmit digitized voice data.
	en.wikipedia.org /wiki/Telephony (293 words)

	Digital Telephony
		WHEREAS the Digital Telephony Act requires telephone, cable television, and computer network companies to alter their switches and computers to ensure that the government can conduct surveillance from a remote location while private communication is going on requires that manufacturers and support companies aid communications companies in complying;
		WHEREAS the Digital Telephony Act also requires the installation of surveillance-facilitating software in telephone switching equipment in order to expose personal information -- such as telephone-calling patterns, credit-card purchases, banking records, and medical records -- to the view of agents of the government and requires that communications companies make that information available to government agencies;
		Therefore, BE IT RESOLVED that the Libertarian National Committee opposes enactment of the proposed Digital Telephony Act as a serious infringement of civil liberties and a gross violation of property rights.
	www.lp.org /issues/printer_resdigitele.shtml (309 words)

	Digital Life Works Launches
		Waltham, MA (PRWEB) August 10, 2006 -- Digital Life WorksSM (DLW), a Digital Home Operating Platform and user-facing portal that streamlines the discovery, sale, provisioning, and management of software, software-as-a-service and related products, is launching this week with an already established world-wide membership community and 12 solution partners in place at the time of launch.
		Digital Life Works offers free membership to consumers with opportunities to purchase many innovative value-added services provided by third-party vendors.
		Digital Life Works is a digital home operating platform that facilitates the discovery, sale, provisioning, and management of software, software-as-a-service and related products.
	www.prweb.com /releases/2006/8/prweb422698.htm (842 words)

	Digital Home - DHC Primer: Digital Telephony (Site not responding. Last check: 2007-10-20)
		In this article, Digital Home Canada explains what Digital Phone and VoIP are and why you might pick one type of digital telephony over another.
		In simple terms, Digital Telephony is a telephone service that uses internet based technologies to send and receive phone through private and public networks rather than using the traditional analog Public Switched Telephone Network which is employed by traditional landline providers.
		To deliver this digital phone call, the Rogers network forwards the call from its network and relays it to the Public Switched Telephone Network (PSTN) where it is then delivered to the Telus phone number.
	www.digitalhomecanada.com /content/view/1446/139 (737 words)

	Define HDT - Host Digital Terminal
		Meaning of HDT - "Host Digital Terminal" is the interface between a cable distribution system and the telephony switch, the HDT acts as a digital multiplexer.
		Adding circuit-switched telephony to an HFC network requires three network elements: a telephony switch, a Network Interface Unit (NIU) and a Host Digital Terminal (HDT).
		The telephony transmitter/receiver units are located in the telephony transceiver shelf in the central office.
	www.birds-eye.net /definition/h/hdt-host_digital_terminal.shtml (842 words)

	Amazon.ca: Digital Telephony, 3rd Edition: Books: John C. Bellamy (Site not responding. Last check: 2007-10-20)
		Bellamy discusses the near-complete conversion to digital technology in telephone networks worldwide, examines both existing and emerging technologies, and explores the intricacies of carrying voice over data networks as well as the use of telephone networks for carrying data for Internet access.
		This books offers an excellent high level overview of the history of the telephony network and the migration to a nearly all digital network including detailed coverage of all aspects and issues of the modern digital systems.
		The book is very well referenced and researched and can serve as a 'root node' for further investigation on nearly any digital telephony related topic.
	www.amazon.ca /Digital-Telephony-3rd-John-Bellamy/dp/0471345717 (935 words)

	DSP-based Modem Software Targets Digital Telephony (Site not responding. Last check: 2007-10-20)
		Though modems are conventionally connected to analog telephone lines, the need for a digital telephony modem is surprisingly common.
		Previous digital telephony products with integral modems have had difficulty using conventional modem solutions.
		For example, if the traditional modem has a fixed digital sampling interface, typically operating at 7.2 kHz, an additional DSP is used to rate convert the sample stream from 8 kHz to 7.2 kHz.
	www.vocal.com /press_release/940613pr.htm (695 words)

	Digital Liberties
		The Digital Telephony Bill, the Clipper chip, and recently the Communications Decency Act have all sparked controversy about the right to free speech and communications privacy in cyberspace.
		In a digital system, sound waves are converted into strings of 1s and 0s which are transmitted as digital signals to a receiver that converts them back to sound waves.
		Ever since Gore announced that the administration would rethink the EES, and the much protested digital telephony act was easily approved minutes before the end of the 1994 Congressional session, the communications privacy debate has proceeded without its former sense of urgency.
	www.acm.org /crossroads/xrds1-4/cyberbate.html (3403 words)

	Leahy and Edwards introduce a narrow Digital Telephony bill with major new privacy protections
		The new legal protection is critical in that it recognizes that this transactional information created by new digital communications systems is extremely sensitive and deserves a high degree of protection from casual law enforcement access which is currently possible without any independent judicial supervision.
		Currently, law enforcement is able to capture not only the telephone number dialed, but also any other touch-tone digits dialed which reflect the user's interaction with an automated information service on the other end of the line, such as an automatic banking system or a voice-mail password.
		Unlike previous Digital Telephony proposals, this bill places no obligation on telecommunication carriers to decipher encrypted messages, unless the carrier actually holds the key.
	www.virtualschool.edu /mon/BigBrother/EFFSupportsWiretap.html (2116 words)

	Formats, Evaluation Factors, and Relationships
		Transparency. Degree to which the digital representation is open to direct analysis with basic tools, such as human readability using a text-only editor.
		To illustrate the complexity associated with curatorial decision-making regarding based digital content, consider the case of a body of recorded music that can be acquired as audio compact disks or as a set of MP3 files.
		Media-independent digital content is stored and can be transported on media, e.g., CD-R, portable hard disk, and data tape, but this use of media is incidental to the content.
	www.digitalpreservation.gov /formats/intro/format_eval_rel.shtml (2317 words)

	ENVI – TV, Broadband, Telephony and Digital Home (Site not responding. Last check: 2007-10-20)
		Envi was set up in 2005 to deliver cutting-edge digital home services such as multi-channel digital TV, high-capacity broadband internet and digital telephony.
		A big part of its business is linking with property developers to wire new houses for broadband, telephony and TV with CAT 6 cabling with multiple network connection points and options for wireless connectivity.
		Sky Digital is available without the need for a sky dish through the community TV network.
	www.e-nvi.com /about/newsroom.asp (1209 words)

	+ PETERSTAR - Telephony - Digital Telephony
		Based on cutting-edge technology, PeterStar’s digital telephone network guarantees connections of the highest quality and reliability.
		The network is based on Lucent Technologies’ 5ESS and Ericsonn’s AXE exchanges, and provides digital connections for private branch exchanges (PBX) from various manufacturers.
		PeterStar’s digital telephony services are provided using the company’s own transport fiber network, which covers most of the city.
	www.peterstar.ru /en/phone/digital_connect.html (171 words)

	The Promise of Digital Telephony
		Over the last couple years, digital telephony services have grown from infancy to broad deployment throughout the United States.
		The key to unlocking the true potential of digital telephony lies more in the “digital” than in the telephony.
		All digital telephony subscribers are, de facto, also broadband subscribers.
	www.xchangemag.com /webexclusives/67h21104555.html (1078 words)

	The Digital Telephony Legislation (Site not responding. Last check: 2007-10-20)
		They claim that the purpose of this law is to allow them to retain the capabilities that they've had in the past.
		In actuallity, none of the new digital telephone systems with which they claim to be concerned actually impede their ability to implement court-ordered wiretaps.
		The reality is that rather than having to bother with actually driving down to the phone company's switching office to install a tap, they want to be able to press a few buttons from the comfort of their own offices, and tap any phone they want.
	www.brouhaha.com /~eric/bad_laws/digital_telephony.html (422 words)

	EPIC Wiretap Pages
		As part of the final omnibus funding bill enacted in the last days of the 104th Congress, the Congress approved a provision allowing for funding the digital telephony bill from money reprogrammed from intelligence and law enforcement agencies.
		White House document obtained under FOIA shows Approval of President George Bush and the link between digital telephony and the Clipper Chip.
		EPIC's FOIA Wiretap Survey Case against the FBI for the surveys allegedly showing the need for the FBI Digital Telephony Proposal.
	www.epic.org /privacy/wiretap (2473 words)

	telephony_optimize (Site not responding. Last check: 2007-10-20)
		One of the key advantages of today's digital telephony systems and unified messaging architectures is that they integrate powerful software applications, which our Programming Services organization can use to analyze, monitor, manage and report on call traffic.
		The Business Cordless 905 Telephone is a multiline digital telephone that integrates with your Avaya communications system—giving you the same call-handling flexibility and control that you have with your desk telephone, combined with the mobility of a cordless phone.
		The handset base and charger includes a spare battery-charging garage; a page/handset locator; and LEDs to indicate when you have a message waiting, when the handset is charging or in use, and when the spare battery is charging.
	www.compuwave.com /html/telephony_optimize.html (2465 words)

	Voip, Avaya, Ip Telephony, Voip Phones
		Canvas Systems is a certified integrator specializing in legacy telephony migrations, life-cycle cost management, asset recovery and Avaya telephony deployments.
		The Avaya Definity 6400 Series is a line of digital telephones that have a wide range of telephony features designed to support a variety of business needs.
		The Avaya Definity 8400 Series is a line of digital telephones that have a wide range of telephony features designed to support a variety of business needs.
	www.canvassystems.com /Avaya.htm (803 words)

	Cisco - Cisco Telephony
		The integration of telephony services into the data network has the potential to drive major changes in institutions by delivering information more efficiently than today's dual-network approach.
		The IP Telephony Readiness Assessment helps customers determine readiness for planning and designing an IP Telephony solution.
		The Cisco DE-30+ Digital Gateway provides a connection path between the Cisco AVVID packet telephony network and the PSTN or a PBX using digital trunks.
	www.cisco.com /warp/public/cc/so/neso/vvda/iptl/index.shtml (835 words)

	SurfCity Networks Moves Into Digital Telephony
		With Digital Telephony, voice calls and Internet data share the same broadband Internet connection, and do it at a substantial savings to the customer.
		VoIP, in contrast, is completely digital from end to end.
		Only recently has reliable telephony software based upon open standards become available.
	www.surfcity.com /press/surfcity_goes_voip_20040830.htm (423 words)

	6.805/STS085: 1994: The Digital Telephony Act (CALEA) (Site not responding. Last check: 2007-10-20)
		The Communications Assistance for Law Enforcement Act (CALEA), also known as the Digital Telephony Act, was passed by Congress in October, 1994.
		This consciousness-raiser by Barlow raised the issues of Digital Telephony and the NSA's involvement two years before this broke in a big way.
		The Electronic Frontier Foundation's archive on Digital Telephony, with extensive source material.
	www-swiss.ai.mit.edu /6805/articles/crypto/digital-telephony.html (332 words)

	CDT \| Wiretap/CALEA
		Digital Search and Seizure: Updating Privacy Protections to Keep Pace with Technology February 2006
		Councilman: A decision by the U.S. Court of Appeals for the First Circuit in Boston in 2004 highlighted a significant flaw in the laws concerning the real-time interception of email communication.
		A federal court in Texas denied the government's attempt to use a "pen register" to obtain call content, but the government is seeking reconsideration of that denial and the court invited EFF and CDT to file a brief addressing the appropriate standards for interception of keypad input such as bank account numbers and voicemail passwords.
	www.cdt.org /wiretap (678 words)

	Digital Media Asia: News - Kabel Deutschland launches digital telephony over cable in Leipzig (Site not responding. Last check: 2007-10-20)
		The converged IP NGN infrastructure is supporting the launch of KDG's ‘Kabel Phone’ service, giving customers access to digital telephony services in addition to television, radio and internet services over the same cable broadband connection.
		KDG customers participating in the Leipzig pilot project has been able to make digital telephone calls over a cable connection instead of the normal telephone connection since 1 April this year.
		The KDG ‘Kabel Phone’ service is scheduled to be available in up to fifteen more cities, including Hamburg, Berlin, Munich, Dresden and Koblenz, by the fourth quarter this year.
	www.digitalmediaasia.com /default.asp?ArticleID=8252 (297 words)

	Policy: Clipper,Key Escrow, and Digital Telephony Contents
		Besides Clipper, Digital Telephony, and the National Information Infrastructure, the government is interested in other areas, such as e-mail delivery (US Postal Service proposal) and maintenance of network systems in general.
		Digital Telephony, ATM networks, and deals being cut - Rumblings of deals being cut - a new draft is out [John Gilmore, 1994-08-03] - Encryption with hardware at full ATM speeds - and SONET networks (experimental, Bay Area?) 9.14.3.
		The USPS plans for mail, authentication, effects on competition, etc. + This could have a devastating effect on e-mail and on cyberspace in general, especially if it is tied in to other government proposals in an attempt to gain control of cyberspace.
	www2.pro-ns.net /~crypto/chapter9.html (6730 words)

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