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Topic: DS1

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	RFC 2495 (rfc2495) - Definitions of Managed Objects for the DS1, E1, DS2 a (Site not responding. Last check: 2007-10-22)
		DS1 Terminology The terminology used in this document to describe error conditions on a DS1 interface as monitored by a DS1 device are based on the late but not final draft of what became the ANSI T1.231 standard [11].
		The DS1 fractional table identifies which DS1 channels associated with a CSU are being used to support a logical interface, i.e., an entry in the interfaces table from the Internet-standard MIB.
		Six DS1 channels (for the sake of the example, channels 1..6) are used for Video, six more (7..11 and 13) are used for data, and the remaining 12 are are in channels 12 and 14..24.
	www.faqs.org /rfcs/rfc2495.html (10061 words)

	DS1 from FOLDOC (Site not responding. Last check: 2007-10-22)
		DS1 is commonly used to multiplex 24 DS0 channels.
		A DS1 frame includes one byte from each of the 24 DS0 channels and adds one framing bit, making a total of 193 bits per frame at 8000 frames per second.
		DS1 signals using ESF equipment are nearly error-free, because the CRC detects errors and allows automatic re-routing of connections.
	foldoc.doc.ic.ac.uk /foldoc/foldoc.cgi?DS1 (277 words)

	Testing DS1/T1 Circuits App Note
		DS1 is the first level of the North American digital hierarchy.
		The structure of the DS1 is twenty-four 64 Kbit/sec DS0 channels time division multiplexed with a framing bit to a single 1.544 Mbit/sec digital stream.
		As defined by ANSI T1.403, and IEEE Standard 1007, the unframed QRS for DS1 consists of a PRBS with a 20 stage shift register with a constraint that forces the output to be a one when the next 14 bits in the sequence would be zeros.
	www.idsdata.com /bertan01.htm (3768 words)

	[No title]
		This object is the identifier of a DS1 Interface on a device.
		DS1 Terminology The terminology used in this document to describe error conditions on a DS1 interface as monitored by a DS1 device are based on the definitions from the ANSI T1M1.3/92-005R1 draft standard [13].
		Six DS1 channels (for the sake of the example, -- channels 1..6) are used for Video, six more (7..11 and 13) -- are used for data, and the remaining 12 are are in channels -- 12 and 14..24.
	www.ietf.org /rfc/rfc1406.txt (5121 words)

	RFC 1232 (rfc1232) - Definitions of managed objects for the DS1 Interface (Site not responding. Last check: 2007-10-22)
		As such, it is important to be able to distinguish between the indices used to identify the CSUs attached to a node and the indices used to identify an interface (in the MIB sense) attached to a node.
		This is intended to facilitate the use of fractional DS1 devices (i.e., devices which utilize a subset of the 8 bit channels available in the frame) over the managed CSUs.
		DS1 Terminology The terminology used in this document to describe error conditions on a T1 or E1 circuit monitored by a CSU are from references [10], [11], [14], and [15].
	www.faqs.org /rfcs/rfc1232.html (3225 words)

	T1 Rex's Business Telecom Explainer: What's The Difference Between DS1 and T1?
		DS1 is a digital signal level that is part of a standardized hierarchy or building blocks of digital services for TDM (Time Division Multiplexing) digital lines.
		A DS1 is a DS1 regardless of whether it is delivered on a T1 line, a microwave relay, a T3 line or a fiber optic carrier.
		A DS1 service might be separated from a higher speed service using an add/drop multiplexer.
	t1rex.blogspot.com /2005/04/whats-difference-between-ds1-and-t1.html (606 words)

	Innovation (Mar/Apr 97) - DS1 (Site not responding. Last check: 2007-10-22)
		DS1 may sound like the fictional HAL 9000 main computer from the landmark science fiction tale 2001: A Space Odyssey.
		The robotic DS1 carries no crew and is much smaller than the spaceship in the movie.
		DS1 is the first scheduled mission in NASA's New Millennium program, which is designed to test and validate cutting-edge technology for the systems and instruments aboard future NASA science spacecraft.
	ipp.nasa.gov /innovation/Innovation52/ds1.htm (488 words)

	RFC 1406 (rfc1406) - Definitions of Managed Objects for the DS1 and E1 Int
		The object types are defined using the conventions defined in the SMI, as amended by the extensions specified in STD 16, RFC 1212 [2].
		This value for this object is equal to the value of ifIndex from the Interfaces table of MIB II (STD 17, RFC 1213).
		The dsx1IfIndex column of the DS1 Configuration table relates each DS1 interface to its corresponding interface (ifIndex) in the Internet-standard MIB (MIB-II STD 17, RFC 1213).
	www.faqs.org /rfcs/rfc1406.html (5060 words)

	RFC 1232 - Definitions of managed objects for the DS1 Interface type. F. Baker, C.P. Kolb.
		RFC 1232 DS1 Interface Objects May 1991 The SMI specifies the use of the basic encoding rules of ASN.1 [8], subject to the additional requirements imposed by the SNMP.
		RFC 1232 DS1 Interface Objects May 1991 ifIndex value assigned to each MIB interface are defined in the ds1ConfigTable table defined in the next section.
		RFC 1232 DS1 Interface Objects May 1991 occurrence of a received bipolar violation that is not part of a zero-substitution code.
	rfc.sunsite.dk /rfc/rfc1232.html (3763 words)

	SBN Mission Support: DS1
		On 28 July 1999 DS1 flew by the near-Earth asteroid (9969) Braille at an estimated altitude of 26 km.
		The scientific goals for the DS1 asteroid flyby included measuring the gross physical properties, surface composition, and interaction of the asteroid with the solar wind.
		The DS1 primary mission ended 18 September 1999, but the mission was extended after the asteroid flyby to include a flyby of comet 19P/Borrelly.
	pdssbn.astro.umd.edu /missions/ds1 (419 words)

	Spaceflight Now \| Breaking News \| Deep Space 1 returns stunning images of comet
		Mission scientists also found that a large bright area in the middle of the nucleus, as well as a smaller bright region at the small end of the nucleus, are linked to several distinct jets of gas and dust emanating from the nucleus.
		DS1 showed that flying close to the nucleus of a comet might not be risky as once thought.
		DS1 will continue to operate for at least the near future, conducting additional technology demonstrations as part of a "hyperextended" mission, according to Rayman.
	www.spaceflightnow.com /news/n0109/25ds1flyby (1642 words)

	digital signal X - a Whatis.com definition - see also: DS0, DS1, DS2, DS3, DS4, DS (digital signal) levels
		DS1, used as the signal in the T1 carrier, is 24 DS0 (64 Kbps) signals transmitted using pulse-code modulation (PCM) and time-division multiplexing (TDM).
		DS2 is four DS1 signals multiplexed together to produce a rate of 6.312 Mbps.
		DS3, the signal in the T3 carrier, carries a multiple of 28 DS1 signals or 672 DS0s or 44.736 Mbps.
	whatis.techtarget.com /definition/0,,sid9_gci212004,00.html (290 words)

	DS1 Prepares To Throttle Up Ion Engine
		In November, DS1 reached its maximum distance from the Sun, and for a few more months its orbit will continue to take it closer (although it will not get as close to the Sun as Earth is).
		The ever-resourceful DS1 team developed a clever method to let controllers know something about the status of the lock to the thrustar during the so-called mid-week tracking session even when a weak antenna on the spacecraft and one of the smaller Deep Space Network antennas are used.
		DS1 is almost 2.3 times as far from Earth as the Sun is and nearly 900 times as far as the moon.
	www.spacedaily.com /news/deep1-01a.html (1706 words)

	IXC-Products & Solutions-DS1
		Sprint's Digital Signal, level One (DS1) service allows a variety of applications to be sent in a single stream of data over a dedicated line.
		DS1 services are provided between end-user-designated premises through serving wire centers, or between your designated premises and a telephone company hub.
		DS1 transmission can be provided on anything from paired copper wire, to coaxial cable, to satellite.
	www.sprint.com /localwholesale/ixc_products_ds1.html (422 words)

	BellSouth SPA DS1 Diverse Service - BellSouth Interrconnection Services (Site not responding. Last check: 2007-10-22)
		BellSouth SPA DS1 Diverse Service is a fundamentally new product developed by BellSouth for all Interexchange Carriers and Competitive Local Exchange Carriers to provide enhanced transport for customers purchasing DS1 services that need enhanced circuit survivability without the added costs of nodal (Central Office) diversity.
		Whether you are using your BellSouth SPA DS1 Diverse Service to transmit data traffic between an end user location and your Interexchange Carrier Point of Presence, or between two end user locations, you are assured of a highly reliable and survivable circuit.
		As outlined in the FCC #1 Tariff, the SAW for DS1 Diverse Service provides a refund of all of your monthly recurring associated with the circuit that suffers a service interruption of 1 minute or more, provided you let us know the service is out.
	www.interconnection.bellsouth.com /products/spa/DS1.html (626 words)

	DS1 Lines (Site not responding. Last check: 2007-10-22)
		Finding DS1 service in your area can be a challenge.
		If a DS1 line is in your near future, take the guesswork out of your search and contact a broker.
		Brokers are able to contact numerous providers in the time it would take you to have a conversation with one or two providers that may not even offer service in your area.
	www.davoice.net /ds1-lines.htm (340 words)

	[No title]
		External&Internal interface scenario: the SNMP Agent resides on a host external from the device supporting DS1 interfaces (e.g., a router).
		The interface identified by a particular value of this index is the same interface as identified by the same value an ifIndex object instance.
		External&Internal interface scenario: the SNMP Agents resides on an host external from the device supporting DS1 interfaces (e.g., a router).
	www.ietf.org /rfc/rfc2495.txt (5939 words)

	DS1 On Track For September Comet Flyby
		DS1 is faced with a similar situation, with the binoculars being like the camera, and the gyros being the assistant's hands.
		Some of the new software that was installed in DS1 in March is designed to analyze the pictures, look for what might be the nucleus, and decide how to move the spacecraft to keep it in the camera's sights.
		But lonely DS1 does not have a planet's magnetic field or atmosphere to shield it from the buffeting of the raging storms on the Sun.
	www.spacedaily.com /news/deep1-01d.html (2039 words)

	DS1 Technologies
		BVQi (It is the most widely recognized registrar in the world today, providing options for multiple accreditations that are recognized worldwide) approved DS1 quality procedures and awarded the certification.
		Atlanta - Apr 02, 2003 - DS1 Technologies has announced that it has successfully deployed POS solution for one of its retail clients.
		DS1 was able to streamline the existing processes and make it more efficient and scalable.
	www.ds1tech.com /news.htm (394 words)

	Weiss Engineering - Digital Audio
		The result is the Gambit DS1, a stand alone digital Dynamics Processor with unparalleled performance and sonic integrity.
		Reviews of the DS1 can be found here (german) and here (german) and here (english).
		Current DS1 owners can upgrade their units to the MK2 version by replacing the DSP board.
	www.weiss.ch /ds1/ds1.html (678 words)

	Roxen Community: RFC 2495 Definitions of Managed Objects for the DS1, E1, DS2 and E2 Interface Types (Standards Track)
		The definitions contained herein are based on the ATandT T-1 Superframe (a.k.a., D4) and Extended Superframe (ESF) formats [17, 18], the latter of which conforms to ANSI specifications [19], and the CCITT Recommendations [20, 21], referred to as E1 for the rest of this memo.
		To model the current state of loopbacks on a DS1 interface, the object dsx1LoopbackStatus defines which loopback is currently applies to an interface.
		The terminology used in this document to describe error conditions on a DS1 interface as monitored by a DS1 device are based on the late but not final draft of what became the ANSI T1.231 standard [11].
	community.roxen.com /developers/idocs/rfc/rfc2495.html (11488 words)

	SPACE.com -- Space Archeologists, 1,000 Years in Future, Could Mine Lost DS1 Probe
		In Sept. 2001, with its technology tests completed and nothing to lose, DS1 swooped past the furiously evaporating nucleus of Comet Borrelly.
		In December 2001, DS1 had been operating three times longer than originally planned, and it had nearly exhausted its supply of hydrazine--a thruster-gas used to keep the solar arrays pointed toward the Sun.
		It just happens that DS1 is well-suited for some future archeologist to recover.
	www.space.com /businesstechnology/technology/ds1_archeology_021220.html (941 words)

	[No title]
		Request for Comments: 3895 RAD Data Communications, Ltd. Obsoletes: 2495 September 2004 Category: Standards Track Definitions of Managed Objects for the DS1, E1, DS2, and E2 Interface Types Status of this Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements.
		DS1 Terminology The terminology used in this document to describe error conditions on a DS1 interface as monitored by a DS1 device are based on the late but not final document of what became the ANSI T1.231 standard [ANSI-T1.231].
		For DS1 links, an Out of Frame defect is declared when the receiver detects two or more framing errors within a 3 msec period for ESF signals and 0.75 msec for D4 signals, or two or more errors out of five or fewer consecutive framing-bits.
	www.isi.edu /in-notes/rfc3895.txt (4506 words)

	Comet Borrelly or Bust (Site not responding. Last check: 2007-10-22)
		The talented DS1 folks at JPL are working very hard to squeeze a bonus science mission, a comet encounter, out of the spacecraft.
		Although Borrelly is not known by stargazers for spectacular displays, it is expected to be active when DS1 arrives in its vicinity next year.
		(The camera that DS1 engineers have pressed into service as a star tracker will have to do double duty during the critical encounter.) The spacecraft also carries an ion mass spectrometer and a near-infrared spectrometer.
	science.nasa.gov /headlines/y2000/ast11jul_1.htm (2242 words)

	BTI Communications Group - Networking - Services - T1 or DS1 (Site not responding. Last check: 2007-10-22)
		T1 (DS1) offers a high quality transmission path to maintain the integrity of the information that is being transported.
		With T1 (DS1), customers may use the entire 1.544 Mbps of bandwidth for a single application between two sites or they may multiplex (channelize) the circuit at the CO or the customer premises for multiple applications.
		For T1 (DS1) or Fractional point-to-point configurations, multiplexing is performed at the customer location with customer-provided multiplexing equipment (which may be purchased from Ameritech).
	www.btigroup.com /network/netSvcsT1.html (1205 words)

	Virtual Private Network (VPN), MIB User's Guide: DS1 MIB, IETF Draft (Site not responding. Last check: 2007-10-22)
		DS1 interfaces include T1 and E1 interfaces on a Shiva device.
		Shiva device that support DS1 interfaces implement the required groups in the IETF draft version of the DS1-MIB, draft-ietf-trunkmib-ds1-mib-06.txt, object identifier {transmission 18}.
		See DS1 Trap for a description of the DS1 trap and its variable bindings.
	www.intel.com /support/si/vpn/lanrover/mibs/xm0308.htm (211 words)

	What will DS1 do on its mission?
		DS1 will blast off from Earth and then deploy and check all systems.
		Afterwards, DS1 will start heading away from Earth in an ever-widening orbit.
		DS1 will test new technologies all through its mission, and radio results back to NASA scientists and engineers on Earth.
	www.qrg.northwestern.edu /projects/vss/docs/mission/zoom-do.html (137 words)

	Boss DS1 Distortion Effects Pedal - zZounds.com
		Music trends may come and go, but it seems that no matter what fad may evolve, a guitar with a good, smooth distortion tone is going to figure into it sooner or later.
		You can crank the DS1 up to a brutal stonk, or dial it down for a more subtle effect.
		The DS1 by Boss is a very, very good distortion pedal.
	www.zzounds.com /item--BOSDS1 (604 words)

	LDCircuit DS3 and DS1 network access solutions
		As you may know, DS1 is a framing specification for transmitting signals at 1.544 Mbps over a T1 facility, while DS3 is a framing specification used in transmitting digital signals at 44.736 Mbps over a T3 facility.
		Most organizations begin with DS1 services and then move up to a higher level of service when they begin to use multiple T1 lines.
		If you are shopping for a leased data line from Portland to Tampa or a DS1 between Chicago and London, LDCircuit will connect you to the right service provider for your bandwidth.
	www.ldcircuit.com /bandwidth/ds3.htm (258 words)

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