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Topic: Digital subscriber line access multiplexer

Related Topics

DSL access multiplexer

Digital Subscriber Line

Multiplexer

Inverse multiplexer

Telephone

Asynchronous Transfer Mode

Direct distance dialing

Code division multiple access

MDM

Digital signal processing

First Battle of Ypres

CDMA

Electronics

Counter

Analog multiplier

	Digital subscriber line access multiplexer - Wikipedia, the free encyclopedia
		The DSLAM at the central office (CO) collects the digital signals from its many modem ports and combines them into one signal, via multiplexing.
		The DSLAM, functioning as a switch, collects the ADSL modem data (connected to it via twisted pair copper wire) and multiplexes this data via the gigabit link that physically plugs into the DSLAM itself, into the Telco's backbone.
		DSLAM is not always located in the telco central office, but may also serve customers within a neighborhood Serving Area Interface (SAI) as part of a digital loop carrier.
	en.wikipedia.org /wiki/Digital_subscriber_line_access_multiplexer (676 words)

	Multiplexer - Biocrawler (Site not responding. Last check: 2007-10-20)
		In digital signal processing, a multiplexer (often abbreviated to "mux" or "muldex") is a device for taking several separate digital data streams and combining them together into one data stream of a higher data rate.
		This would be typical where a multiplexer serves a number of IP network users and then feeds directly into a router which immediately reads the content of the entire link into its routing processor and then does the demultiplexing in memory from where it will be converted directly into IP packets.
		For example, a two-input multiplexer is a simple connection of logic gates whose output Y is either input A or input B depending on the value of a third input S which selects the input.
	www.biocrawler.com /encyclopedia/MUX (651 words)

	Digital subscriber line - Wikipedia, the free encyclopedia
		Digital Subscriber Line technology was originally implemented as part of the ISDN specification.
		The location of the DSLAM depends on the telco, but it cannot be located too far from the user because of attenuation, the loss of data due to the large amount of electrical resistance encountered as the data moves between the DSLAM and the user's DSL modem.
		This converts data from the digital signals used by computers into a voltage signal of a suitable frequency range which is then applied to the phone line.
	en.wikipedia.org /wiki/Digital_subscriber_line (2019 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.
		Digital Subscriber Line Access Multiplexer - this is the device that connects many ADSL circuits to the BT network by multiplexing traffic onto one or more trunk lines.
		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)

	Digital subscriber line
		Digital Subscriber Line, or DSL, refers to a family of technologies that provide a digital connection over the copper wires of the telephone network.
		A DSL connection is made between equipment of the subscriber and the telephone exchange, with some other protocol used between the exchange and whoever the subscriber really wants to connect to, typically an Internet service provider.
		The subscriber end of the connection consists of a DSL modem, which has the job of converting the digital stream into analogue signals with various frequency bands, as required for the particular DSL variant in use.
	www.ebroadcast.com.au /lookup/encyclopedia/ds/DSL.html (485 words)

	Digital Subscriber Line
		In asymmetric digital subscriber line (ADSL), the voice frequency band of 300 Hz is blocked and redirected to a telephone set and all other frequencies are passed through to the modem or transceiver.
		In informal common usage in digital communications, bandwidth is used to indicate the maximum transmission rate of a facility in bits per second (for example, 4800 bps), or the information carrying capacity of a medium or system.
		A circuit switch that terminates all the local access lines in a particular geographic serving area; a physical building where the local switching equipment is found.
	www.gtidsl.com /glossary.htm (6202 words)

	What is Fast Guide to DSL? - a definition from Whatis.com - see also: DSL, xDSL, DSL Guide, Digital Subscriber Line (Site not responding. Last check: 2007-10-20)
		DSL (Digital Subscriber Line) is a technology for bringing high-bandwidth information to homes and small businesses over ordinary copper telephone lines.
		Digital Subscriber Line is a technology that assumes digital data does not require change into analog form and back.
		Digital data is transmitted to your computer directly as digital data and this allows the phone company to use a much wider bandwidth for transmitting it to you.
	searchnetworking.techtarget.com /sDefinition/0,,sid7_gci213915,00.html (1903 words)

	Digital Transmission — from IP Television Magazine.
		A digital subscriber line access multiplexer is an electronic device that usually holds several digital subscriber line (DSL) modems that communicate between a telephone network and an end customer's DSL modem via a copper wire access line.
		The setup and control of a DSLAM is typically performed by a control protocol such as simple network management protocol (SNMP) that can be sent on the same data communication network that transfers the data to and from the DSLAM and the equipment configuration information is stored in a separate management information base (MIB).
		If the device with the destination Ethernet address hears the packet on its receiver lines, it will begin to retransmit the packet on it's transmitter lines (which are connected to the sending device's receiving lines) allowing the sender to know the transmission has been receive and the rest of the frame can be transmitted.
	www.iptvarticles.com /iptvmagazine_2005_11_dsl.htm (3290 words)

	DSL and Cable Modem Networks > Digital Subscriber Line (Site not responding. Last check: 2007-10-20)
		Digital subscriber line (DSL) technology is a modem technology using existing twisted-pair telephone lines to carry high-bandwidth applications, such as multimedia and video.
		Digital Subscriber Line Access Multiplexer (DSLAM)—Concentrates data traffic from multiple DSL loops onto the backbone network for connection to the rest of the network.
		Line attenuation increases with line length and frequency, and decreases as wire diameter increases.
	www.ciscopress.com /articles/article.asp?p=31289 (1290 words)

	Digital Subscriber Line
		Digital Subscriber Line is a technology based on the idea that data transmitted over twisted pair (P.O.T.S.) lines does not need to be converted from digital to analog and then back to digital, which is how modems work.
		Instead the data is transmitted across the lines as digital data, which allows the phone company to use much wider bandwith in transmitting the data.
		Line quality is a measure of the signal-to-noise ratio on a given line.
	networking.ringofsaturn.com /Telecommunications/DSL.php (6347 words)

	DSLAM (Digital Subscriber Line Access Multiplexer) Definition
		Stands for "Digital Subscriber Line Access Multiplexer." A DSLAM is a device used by Internet Service Providers (ISPs) to route incoming DSL connections to the Internet.
		For example, a DSL access multiplier may receive signals from all the DSL modems in a certain neighborhood and patch them through to the Internet backbone.
		The DSLAM processes each incoming connection and may limit the bandwidth of certain DSL lines.
	www.techterms.org /definition/dslam (135 words)

	Digital subscriber line access multiplexer - InformationBlast
		A digital subscriber line access multiplexer, (DSLAM) is a multiplexer located in the telephone company exchange that provides consumers access to DSL services over twisted pair copper cabling.
		The DSLAM usually aggregates lines at a contention ratio of 50:1 or 20:1.
		Alternatively, a DSLAM multiplexes the signals output by a MDF (which separates voice and data in DSL telephony) which belong to different users into a stream which can be processed by an ATM network.
	www.informationblast.com /Digital_subscriber_line_access_multiplexer.html (134 words)

	Encyclopedia Search
		(DSLAM) terminates the DSL circuits and aggregates them where they...
		stream into analogue signals with various frequency bands, as required...line access
		Note: This function may be integrated into the ET.
	www.encyclopedian.com /search.php?searWords=Digital-multiplexer (143 words)

	Multiservice Digital Subscriber Line Access Multiplexer (DSLAM)
		Digital subscriber line access multiplexers (DSLAMs) are a leading broadband access technology, delivering exceptionally high-speed data transmission over existing copper telephone lines.
		Typical DSLAM systems are ATM-based, with the primary role of aggregating multiple xDSLOs for uplink to the network.
		The number of subscribers a DSLAM can handle is a key requirement, and supporting such high density per platform or card requires a range of interfaces and speeds.
	www.freescale.com /webapp/sps/site/application.jsp?nodeId=02VS0lzZYWSZGC (742 words)

	DSL Digital Subscriber Line Glossary AD
		A protocol that packs digital information into 53-byte cells (5-byte header and 48-byte payload) that are switched throughout a network over virtual circuits.
		Also called "service access multiplexer." The DSLAM uses digital subscriber line (xDSL) and asynchronous transfer mode (ATM) technologies to deliver high speed data rates over the existing copper network.
		A generic term for the suite of digital subscriber line (DSL) services, where the "x" can be replaced with any of a number of letters.
	www.aquila.net /html/dsl_glossary_ad.html (1295 words)

	Nokia Accelerates Deployment of RBOC's Broadband Networks with Industry's Most Aggressive Strategy for Optimized ...
		DS1 Line Card is a new type of line card that facilitates a variety of low cost carrier services while extending broadband network coverage.
		The DS1 line card can also be used to deliver T1 and fractional T1 for frame relay voice and data services over the ATM network.
		For example, the DS1 Line card can be used to transport IP media services over microwave radio instead of copper, thus extending service beyond what might be inaccessible by DSL.
	www.findarticles.com /p/articles/mi_m0BFP/is_2000_June_12/ai_62670906 (894 words)

	What Is...DSL and xDSL (Digital Subscriber Line) (a definition)
		Within a few years, DSL is expected to replace ISDN in many areas and to compete with the cable modem in bringing multimedia and 3-D to homes and small businesses.
		Access One, BellSouth's service partner, has committed to deploy a minimum of 10,000 DSL lines to its customers over the next two years.
		HDSL can carry as much on a single wire of twisted-pair as can be carried on a T1 line in North America or an E1 line in Europe (2,320 Kbps).
	www.provide.net /~wilde/dsl/dsl.htm (2666 words)

	DSLAM Jobs, Average Salary for Digital Subscriber Line Access Multiplexer (DSLAM) Skills
		Included is a guide to the average salaries offered in IT job ads that have cited DSLAM over the last 3 month to 31 October 2006 with a comparison to the same period last year.
		The chart provides a 3 month moving total of permanent IT jobs ads citing DSLAM across the UK as a proportion of the total demand within the Communications & Networking category.
		This section looks at the demand and provides a guide to the average salaries quoted in IT job ads citing DSLAM within the UK region over the last 3 months to 31 October 2006.
	www.itjobswatch.co.uk /jobs/uk/dslam.do (280 words)

	DSL Market Still Hot: DSLAMs and VoDSL to Drive Growth, According to Cahners In-Stat Group
		The market for ADSL DSLAMs is dominated by Alcatel, leading the pack with a 53.2 percent share.
		The market for DSLAM units will grow considerably in the next five years, but not as briskly as subscribers as a good amount of infrastructure is already in place and service providers have called upon manufacturers of DSLAMs to increase density on their units.
		DSLAM Market Analysis (#TX0101IN), looks at the major manufacturers of DSLAMs, the challenges they face, and their key products.
	www.instat.com /pr/2001/tx0102sp_pr.htm (698 words)

	Hollinet - "We Bring the Internet to You!"
		DSL utilizes a bridge or router at the customer location, which connects to a Digital Subscriber Line Access Multiplexer (DSLAM) in the telephone company's Central Office (CO).
		The DSLAM is property of New Edge Networks, who leases space in the CO to collocate the DSLAM.
		The copper phone lines that connect to the bridge/router at the customer location travel through the DSLAM in the CO; this is what enables high-speeds on the line.
	www.hollinet.com /hollinet_dsl_whatis.htm (590 words)

	Documentation
		A digital subscriber line (DSL) technology in which the transmission of data from server to client is much faster than the transmission from the client to the server.
		The line rate for return messages or data transfers from the network machine to the customer’s premise machine.
		The line rate for message or data transfer from the source machine to a destination machine on the network.
	support.dell.com /support/edocs/COMM/6951e/Gloss.HTM (665 words)

	DSLAM ( Digital Subscriber Line Access Multiplexers and DSL Access Multiplexers) Definition
		The GEmini™ Ethernet Remote DSLAM provides integrated GigE backhaul with 24-192 port scalability.It provides non-blocking ADSL2+ bandwidth using standards-based Gigabit Ethernet in a physically small shell that is environmentally hardened.
		Loop bonding (also know as inverse multiplexing) allows multiple physical lines to be grouped together in order to achieve higher data rates.
		DSLAM DEFINITION (continued): … A DSLAM (Digital Subscriber Line Access Multiplexer) is a network device, usually at a telephone company central office, that receives signals from multiple customer Digital Subscriber Line (
	www.bitpipe.com /tlist/DSLAM.html (361 words)

	Dsl Access Multiplexer (Site not responding. Last check: 2007-10-20)
		Digital Subscriber Line Access Multiplexer) ist ein Teil der f??????r den Betrieb von DSL ben??????tigten Infrastruktur verteilt) auf ??????rtlicher Ebene den DSL-Datenverkehr der Endkunden und
		Digital Subscriber Line Access Multiplexer In a DSL system, the equipment DSL access multiplexer.
		DSLAM (digital subscriber line access multiplexer) DSLAMs sit in a carrier's central office They separate voice and DSL traffic and then control and route DSL traffic between
	www.hot-broadband-internet-provider.info /get/dsl-access-multiplexer.html (473 words)

	DSLAM: Digital Subscriber Line Access Multiplexer
		Digital Subscriber Line Access Multiplexer (DSLAM), a system in the DLS technology architecture, links and aggregates many customer DSL connections to a single high-speed ATM line.
		A DSLAM separates the voice-frequency signals from the high-speed data traffic and controls and routes digital subscriber line (xDSL) traffic between the subscriber's end-user equipment (router, modem, or network interface card [NIC]) and the network service provider's network.
		The multiservice DSLAM can also be configured to add value in the form of routing and security functionality.
	www.networkdictionary.com /telecom/dslam.php (464 words)

	Powers of concentration: As the number of ADSL users increases, an access concentrator can help provision and manage ...
		An essential component of an infrastructure that can meet all these needs is a data/video access concentrator, which will permit a service provider to consolidate data traffic over the high-speed ADSL connections into a single high-speed data pipe for network interface, much like a digital subscriber line access multiplexer (DSLAM).
		A data/video access concentrator also enables a single ADSL connection to be used simultaneously for video and data transmission.
		At the CO, the data/video access concentrator includes external POTS splitters to separate the voice and data traffic from the combined telephone/ADSL signals in the twisted pair cable connection (Figure 2).
	telephonyonline.com /mag/telecom_powers_concentration_number (1380 words)

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