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Topic: DSL access multiplexer

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Digital subscriber line access multiplexer

Digital Subscriber Line

HDSL

DSL around the world

Asymmetric Digital Subscriber Line

Asynchronous Transfer Mode

Demarcation point

Local loop

Digital signal processing

PPPoA

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Digital Subscriber Line

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	Digital Subscriber Line - Wikipedia, the free encyclopedia
		As of 2005, DSL provides the principal competition to cable modems for providing high speed Internet access to home consumers in Europe and North America; although on average, cable is much faster than DSL in most commercial situations.
		DSL takes advantage of this unused part of the circuit by creating 4312.5 Hz wide channels starting between 10 and 100 kHz, depending on how the system is configured.
		At the exchange a digital subscriber line access multiplexer (DSLAM) terminates the DSL circuits and aggregates them, where they are handed off onto other networking transports.
	en.wikipedia.org /wiki/Digital_Subscriber_Line (1386 words)

	Scalable DSL access multiplexer with high reliability
		The multiplexing device as in claim 1, wherein the DSL transceiver, the packet buffer, the Ethernet-type port, and the CPU are housed in a stackable chassis.
		DSL multiplexer 252 has station 6 modems 300, which can be connected to 24 subscriber lines (SL) (e.g., 222) having customer premise modems, for example, DSL modem 220.
		DSL multiplexer 252 will route SNMP packets destined for other DSL multiplexers 252 as follows: (a) packets received on the serial port will be sent either to the 10Base-T port or to the 100Base-T port depending on the routing table, (b) packets received on the 10Base-T port will be sent on the 100Base-T port.
	www.freepatentsonline.com /6477595.html (8439 words)

	Internet Access with DSL (Site not responding. Last check: 2007-10-16)
		DSL runs on phone lines, which are among the most reliable networks in the world.
		DSL is connected at the same rate every time and you are the only user on your circuit (which also provides better security).
		DSL is a modem technology that turns a customer's existing single pair of copper phone wires into a three-channel data delivery system.
	www.info-quest-search.com /dsl/DSL.htm (5954 words)

	DSLAM - Digital Subscriber Line Access Multiplexer
		Used for DSL connections, a Digital Subscriber Line Access Multiplexer is located at the phone company's CO and connects you to a high-speed ATM line.
		A Digital Subscriber Line Access Multiplexer (DSLAM) is a network device, usually at a telephone company central office, that receives signals from multiple customer Digital Subscriber Line (DSL) connections and puts the signals on a high-speed backbone line using multiplexing techniques.
		Digital Subscriber Line Access Multiplexer In a DSL system, the equipment at the telephone central office that separates the data signals from the telephone line.
	www.auditmypc.com /acronym/DSLAM.asp (715 words)

	Asymmetric Digital Subscriber Line - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-16)
		Asymmetric Digital Subscriber Line (ADSL) is a form of DSL, a data communications technology that enables faster data transmission over copper telephone lines than a conventional modem can provide.
		ADSL has the distinguishing characteristic that the data can flow faster in one direction than the other, i.e., asymmetrically.
		Because of the relatively low data-rate (compared to optical backbone networks) ATM is an appropriate technology for multiplexing time-critical data such as digital voice with less time-critical data such as web traffic; ATM runs widely over ADSL technology to ensure that this remains a possibility.
	www.lexington-fayette.us /project/wikipedia/index.php/ADSL (809 words)

	DSL has a DLS (dirty little secret)
		In the growing battle to sell inexpensive high-speed access pipes, DSL partisans claim their technology is better than cable modems because it offers dedicated bandwidth, while cable is a shared medium.
		That is true, at least until the DSL line hits the first device in the service provider network, known as a DSL Access Multiplexer.
		DSL provider NorthPoint Communications oversubscribes its trunks by a measure of 2 to 1, meaning the bandwidth coming into a network trunk is twice what the trunk can bear.
	www.networkworld.com /news/1999/0301dsl.html (1299 words)

	Concentric \| DSL VPN \| FAQ (Site not responding. Last check: 2007-10-16)
		The splitter is a small device that has three jacks one for the DSL modem, one for the voice line, and the third to connect to the DSL circuit.
		The technical description of Concentric's DSL traffic isolation implementation is that although the DSL modems are configured in bridged mode, Concentric uses separate virtual circuits for each customer DSL modem, and enforces no-bridging at the device that terminates the virtual circuits.
		The DSL circuit must be reconfigured for the new speed, and your connection to the Concentric Network backbone must be reset as well.
	www.csua.berkeley.edu /~johnkli/concentric/faq1.htm (2474 words)

	A panacea for DSL access
		IDSL data calls do not go through the voice infrastructure; they are routed through a DSL access multiplexer and then directly to a data network such as the Internet.
		Another major benefit of IDSL is that it is the only DSL solution that works from the CO when digital loop carriers are on the local loop (Figure 2).
		It is not easy for CLECs to gain access to DLCs in the field and install a DSL card; existing DLCs may not even have enough backhaul bandwidth to accommodate DSL or enough physical space to add many DSL cards.
	telephonyonline.com /mag/telecom_panacea_dsl_access/index.html (1631 words)

	High Speed Internet Access - Broadband
		DSL and CM equipment are generally based on standard specifications and required certification, however, the best advice is to check with the service provider prior to purchase of such equipment.
		Satellite access to the Internet is an alternative to DSL service and CM service, and in particular, its major advantage is its ability to reach areas that other alternatives can not.
		It is another way of accessing the Internet, which would allow consumers to surf the Web and read their e-mails with speeds much faster than dial-up access, and comparable to the speeds of DSL and CM.
	www.fcc.gov /cgb/consumerfacts/highspeedinternet.html (2966 words)

	Digital Subscriber Line (DSL) (Site not responding. Last check: 2007-10-16)
		DSL is a high-speed connection that uses the same wires as a regular telephone line.
		The DSL service provider has a DSL Access Multiplexer to receive customer connections.
		In order for most DSL services to work the CO must be within about 18,000 feet of the end-user.
	people.clarkson.edu /~whitejh/dsl.html (610 words)

	SpiderPost: Webified News for Business
		DSL is a very high-speed connection that uses the same wires as a regular telephone line
		DSL exploits this "extra capacity" to carry information on the wire without disturbing the line's ability to carry conversations.
		Symmetric DSL (SDSL) - This connection, used mainly by small businesses, doesn't allow you to use the phone at the same time, but the speed of receiving and sending data is the same.
	www.spiderhost.com /newsletter/0504.htm (5652 words)

	IEC: Digital Subscriber Line Access Multiplexer (DSLAM)
		Packetized voice, the transmission of telephone calls over a data network with xDSL as the access method, is widely predicted to become a reality over the next five years.
		The bandwidth available on a single DSL circuit allows the carrier to provide data services in the range of hundreds of kbps and also accommodate 4 to 16 plain old telephone service (POTS) lines.
		This analysis shows that while providing data-only service over DSL is an attractive business, adding voice services for a customer dramatically increases revenue with minimal costs.
	www.iec.org /online/tutorials/dslam/topic05.html (578 words)

	SBU 6C
		Accoda's SDSL Mini DSLAM is the industry's first remote access multiplexer that is fully compliant with IPacket™ and AutoIP™ technology.
		The SMD2000-12 is ideal for deploying high speed, business class DSL in a Street Cabinet, or as a small-scale Central Office or in-building DSL solution.
		Accoda's IP DSL Access Multiplexer is the industry's first native IP packet-based DSLAMs, supporting the best of today's leading edge access technologies.
	www.accoda.com /products_dsl_access.htm (378 words)

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	A switch or a mux? Access system aims to ease DSL deployment
		Taking a new tack to implementing digital subscriber line services, upstart Promatory Communications introduced the Intelligent Multiservice Access System, combining the functionality of a DSL access multiplexer with an asynchronous transfer mode switch.
		But the success of DSL is complicated by regulatory issues, said Tom Nolle, president of Cimi Corp. Regional Bell operating companies have little incentive to deploy DSL because they have to sell it to competitive carriers at cost, he said.
		The added functionality will position the IMAS "not as an access device but as a device on the edge of the [time division multiplexing] network," Nolle said.
	telephonyonline.com /mag/telecom_switch_mux_access (664 words)

	Sun: iForce OEM Partner Success - NEC (Site not responding. Last check: 2007-10-16)
		The company has exported more than $55 million of locally developed DSL Access Multiplexer equipment and network management systems to Asia in the past two years, having shipped more than one million ADSL lines.
		The Director DSL management system, a fully functional network and service management system platform, supports a wide range of broadband services and network technologies.
		It runs on the Sun Enterprise servers and the Sun Fire family of servers, with several standard configurations, depending on the number of DSL subscribers that need to be supported.
	www.sun.com /oem/stories/020417nec.html (600 words)

	Integral Access (Site not responding. Last check: 2007-10-16)
		PurePacket is the first packet-based multi-service access system that brings MPLS (Multi Protocol Label Switching) and routing intelligence to DSL access networks, and dynamically provisions resources for delivering voice, video, tiered data and Virtual Private Network (VPN) services.
		By combining the functionality of a voice gateway, DSL Access Multiplexer (DSLAM), Digital Loop Carrier (DLC), and Digital Cross Connect in one platform, PurePacket allows network operators to deploy a single, cost effective and easy to manage IP-based access network for delivering all services over DSL access lines.
		Unlike current DSL systems that are based on ATM, PurePacket has been designed to seamlessly integrate with the emerging converged IP public core network.
	www.integralaccess.com /pr_9_18_00.htm (882 words)

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	Ericsson Press release: Emitel selects Ericsson for Ethernet DSL broadband network
		Emitel is the first network operator in the Central and Eastern European region that has selected Ericsson's Ethernet DSL Access solution, featuring the world's smallest DSL Access Multiplexer (DSLAM).
		Ericsson is to provide Emitel with Asymmetric DSL (ADSL) lines to establish broadband service for smaller towns and local communities of southern Hungary.
		About Ericsson's Ethernet DSL Access Solution Ericsson's Ethernet DSL Access solution enables fixed network operators to deploy the required second-mile bandwidth at less than half of the cost of equivalent ATM-based bandwidth.
	www.ericsson.com /press/20030610-130157.html (470 words)

	NTN \| IPD12000 \| 12 Slot Ethernet based IP DSL Access Multiplexer 12000 (Site not responding. Last check: 2007-10-16)
		Net to Net Technologies' IP DSL Access Multiplexer is the industry's first native IP Ethernet packet-based DSLAM, supporting the best of today's leading edge access technologies.
		The IPD12000 is engineered for efficient, high-speed IP data transport in a compact, fully fault-tolerant chassis.
		Supporting high density DSL, T1/E1, and DS3/E3 access technologies, the IPD12000 is the optimal line aggregation platform for today's advanced IP-based access networks.
	www.nettonet.com /products/IPD12000?print=1 (302 words)

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	Galaxy Internet Services
		Reasons why DSL may not be available at your location.
		The Phone Company's Central Office in your town or city must have the equipment for DSL (DSL Access Multiplexer).
		Other factors that may impact DSL availability are fiber optics, load coils, or no facilities (i.e.
	www.gis.net /~sotis/dslavail.html (109 words)

	DSLAM definition - isp.webopedia.com - The Glossary for Internet Service Providers
		Short for Digital Subscriber Line Access Multiplexer, a mechanism at a phone company's central location that links many customer DSL connections to a single high-speed ATM line.
		When the phone company receives a DSL signal, an ADSL modem with a POTS splitter detects voice calls and data.
		Voice calls are sent to the PSTN, and data are sent to the DSLAM, where it passes through the ATM to the Internet, then back through the DSLAM and ADSL modem before returning to the customer's PC.
	isp.webopedia.com /TERM/D/DSLAM.html (131 words)

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	PRESS RELEASE ADTRAN Selects Infineon`s ADSL 2+ GEMINAX MAX(TM) Chipset to Address Growing Demand for xDSL Broadband ... (Site not responding. Last check: 2007-10-16)
		"Big service providers are aggressively marketing DSL technology, with the vision of migrating today's broadband data customer to a full multi-media subscriber within the next few years," said Steve Rago, Principal Analyst, Market Intelligence Services, iSuppli.
		"Net DSL subscribers in the USA are expected to jump by 40 percent in 2005 and reach almost 30 million by the end of 2006.
		There is also a strong trend in the USA to push the DSLAM closer to the subscriber.
	www.marketwire.com /mw/release_html_b1?release_id=88266 (614 words)

	Ericsson Press release: Ericsson awarded Ethernet DSL contract with China Telecom Zheijang
		This is the third order placed by China Telecom to deploy Ericsson's ultra-compact, highly scalable Ethernet DSL Access solution, which features the world's smallest DSL Access Multiplexer (DSLAM).
		As part of an IP MAN (Metro Area Network) deployment in Ningbo city, Ethernet DSL Access will help Ningbo Telecom to develop their broadband access networks in a more flexible way by providing very cost-effective high-bandwidth links in the 'second mile' network.
		The large city will at completion hold the largest Ethernet DSL Access lines implemented, further strengthening Ericsson's position in broadband access market in China.
	www.ericsson.com /press/20030521-113347.html (372 words)

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