
	Where results make sense

Topic: Remote concentrator

Related Topics

Telephone exchange

Local loop

List of switches

Pair gain system

Switching center

Public switched telephone network

Digital Subscriber Line

PDH

Asymmetric Digital Subscriber Line

Common carrier

ETSI

V5

In the News (Thu 3 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Remote concentrator - Wikipedia, the free encyclopedia
		In modern telephony a remote concentrator is the lowest level in the telephone switch hierarchy.
		The interface between remote concentrators and their parent telephone switches has been standardised by ETSI as the V5 protocol.
		The trick is that after the central switch tells the concentrator which time slot to use, the concentrator "opens" a time-slot on the loop to a local phone.
	en.wikipedia.org /wiki/Remote_concentrator (358 words)

	Multidrop data concentrator communication network - Patent 4726017
		When a remote port is polled for a data reply, it proceeds to transmit a response to equipment at the master site that had previously included a request for data in a message to a device couped to that port.
		Before describing, in detail, the particular improved multidrop concentrator communication scheme in accordance with the present invention, it should be observed that the present invention resides primarily in a novel structural combination of conventional communication and data/signal processing circuits and not in the particular detailed configurations thereof.
		Since the concentrators do not convert the protocol of messages coupled to their ports to a different protocol for transmission, but rather simply envelope the data which is queued in memory as received from an associated terminal, interfacing circuitry is less complicated and thereby more reliable.
	www.freepatentsonline.com /4726017.html (4634 words)

	Concentrator - Wikipedia, the free encyclopedia
		In data transmission, a functional unit that permits a common path to handle more data sources than there are channels currently available within the path.
		A concentrator usually provides communication capability between many low-speed, usually asynchronous channels and one or more high-speed, usually synchronous channels.
		ISP usually use concentrators to enable modem dialing, this kind of concentrator is sometimes called a modem concentrator or a remote access concentrator.
	en.wikipedia.org /wiki/Concentrator (171 words)

	Computer controlled telephone answering system - Patent 3987252
		Each remote site also has a special purpose digital control unit to control and verify the operation of the analog switching matrices, a digital memory to hold temporarily command messages for forwarding to the central site of the answering service, and a digital logic for ring detection, switch control and message verification.
		Within each remote site unit there is a control unit and an analog switching matrix or trunk concentrator in which these 1,024 trunk lines 30 are concentrated by the remote site concentrator 32, as hereinafter described, down to 16 or less trunk lines 34 which lead to a telephone answering service central site 36.
		At this point, the ring is indicated to the remote site control unit buffer memory 98 which retrieves a word with answer instructions from its memory, increments a bit to count the rings, and compares the results to the predetermined number of rings required for answering the line.
	www.freepatentsonline.com /3987252.html (9251 words)

	[No title]
		If all 26 remote users connect at the same time and decide to download a large file, their actions could conceivably slow down connections between the headquarters and sites B and C. The bandwidth management feature could be enabled on the Concentrator to distribute the bandwidth more equitably.
		If a remote user is not a member of a predefined group, he or she can transmit data up to the system-wide policing rate.
		If a remote user belongs to a group that is not specifically defined a policing rate, that person is assigned the policing rate defined for the interface.
	www.informit.com /content/images/1587200708/downloads/Bandwidth.doc (2781 words)

	[No title]
		In the initial RAO Letter 21, the Division stated that the primary factor distinguishing a remote concentrator terminal from a remote switch was that a remote switch has stand-alone switching capability while a concentrator does not have that capability.
		We recognize that both concentrators and remote switches often provide similar functions and that this may cause confusion in determining to which accounts the equipment should be assigned.
		Virtually all remote units that contain a switching matrix routinely perform the interconnection function locally and rely on the host unit for the control function, except in the event of an emergency, when the control function is also transferred to the remote.
	www.fcc.gov /Bureaus/Common_Carrier/Orders/1997/fcc97241.txt (4011 words)

	ACU2000 Alarm Concentrator
		ACU2000 units can also be used to remotely control each other by for example the alarm input on one unit activating a relay on a remote unit over an ethernet LAN.
		Remote alarm indications can activate a local or remote relay action or can initiate an email message or a short message to either a pager, SMS cellphone or other mobile communications device.
		The ACU2000 Alarm Concentrator can be interfaced directly via RS232 to any of the other Selective Communications wireless data products such as Mobile Data Terminals and Paging Data Terminals.
	www.selective.co.nz /acu2000.html (219 words)

	Networkers gun for remote access \| CNET News.com
		Remote access is a general term used to describe the market for hardware that allows remote users to connect to computers.
		Gartner Group consultancy predicts that there will be nearly 60 million users of remote access technology by the year 2000, with the figure doubling two years later.
		The company is offering up new modules for the CyberSwitch remote access platform that support digital modems and shoring up its low end with a new box called the 5500, which supports up to 120 simultaneous remote users.
	news.com.com /2100-1001-202263.html (549 words)

	Define AC - Access Concentrator
		Meaning of AC — “Access Concentrator”, is a remote access device that efficiently forwards data, allowing multiple calls to come in over one port from the telephone company, resulting in higher call densities than remote access servers.
		The access concentrator is able to forward traffic based on PPP session information as well as IP addresses.
		Remote Access Concentrator Forecast - This IDC study examines the RAS concentrator market from 2002 to 2008.
	www.birds-eye.net /definition/a/ac-access_concentrator.shtml (639 words)

	Concentrator Remote Access Connections with PPTP, L2TP, and WebVPN > PPTP and L2TP Remote Access (Site not responding. Last check: 2007-10-13)
		The configuration of PPTP and L2TP remote access is much simpler than that of IPsec, even if you'll be using L2TP over IPsec; this is because if you're using IPsec with Cisco remote access clients, you have many more IKE Mode Config features than what L2TP over IPsec clients support.
		Tunnels— This text box allows you to configure the maximum number of active PPTP tunnels that you want your concentrator to support; please note that you are restricted to a maximum based on the concentrator model the PPTP tunnels terminate on.
		Tunnels— This text box allows you to configure the maximum number of active L2TP tunnels you want your concentrator to support; please note that you are restricted to a maximum based on the concentrator model the PPTP tunnels terminate on.
	www.informit.com /articles/article.asp?p=474237 (1691 words)

	MMS in AFTN System Applications
		The LAN hubs are used at the switching center and remote concentrator sites to connect together the switching server/PCs and the control, message correction, archiving, and monitoring terminals.
		The IEEE 802.11b protocol also provides a means to connect, to any remote concentrator or the switching center itself, any building complexes within a radius of 6 miles.
		This 'concentration ratio' of 2 to 1 is very conservative, and a ratio of 5 to 1 has been tested with only moderate message delays introduced by call set-up delays.
	www.digres.com /aftn/MMS.htm (5826 words)

	CCSP Cisco Secure VPN Exam: Remote Access Configuration > Foundation Topics (Site not responding. Last check: 2007-10-13)
		Browser: Identify the method the concentrator is to use for assigning IP addresses to clients as a tunnel is established.
		After the VPN concentrator has accepted your administrator login, the screen shown in Figure 4-5 is displayed in your browser window.
		This permits remote users to access the services of a private network as though the users were attached directly to the network, with the security of encrypted communications between the client and the host.
	www.ciscopress.com /articles/article.asp?p=31767 (12524 words)

	[No title]
		It is intended to be used with broadband remote access technologies that provide a bridged Ethernet topology, when access providers wish to maintain the session abstraction associated with PPP.
		Once a PPP session is established, both the Host and the Access Concentrator MUST allocate the resources for a PPP virtual interface.
		It is RECOMMENDED that the Access Concentrator ocassionally send Echo-Request packets to the Host to determine the state of the session.
	www.ietf.org /rfc/rfc2516.txt (3372 words)

	ISP-Planet - Equipment - DSL Beyond the CO (Site not responding. Last check: 2007-10-13)
		Digital Loop Carriers (DLCs) in remote cabinets serve millions of customers in North America — depending on the territory, from 15 percent to 40 percent of lines — and are projected to serve as much as 53 percent in some regions by 2003.
		Copper Mountain's CopperEdge 200 RT is supposed to move all the functionality of the CopperEdge 200 to the end of the digital loop, extending the DSL feature set to business and residential customers who previously could not receive full DSL service because of their distance from COs.
		Copper Mountain claims that its NEBS 3-compliant CopperEdge 200 RT DSL Concentrator is being optimized not only for the physical challenges of the remote environment — which include extreme temperature and humidity fluctuations, high levels of airborne contaminants, and space limitations — but also for operational challenges such as high density under restrictive power budgets.
	www.isp-planet.com /equipment/dsl_remote.html (723 words)

	Critical Networks - Cisco VPN client troubleshooting (Site not responding. Last check: 2007-10-13)
		If the s/w client is configured with an incorrect IP address for the remote VPN concentrator/hub, an error message saying "Remote Peer is not responding" or "Remote Peer is no longer responding" will be displayed.
		If you are connecting to a cisco VPN concentrator such as the 3060, viewing the logs can help speed up the troubleshooting process.
		If you are using a VPN concentrator like the 3060 then you can enter in the user's login information directly on the concentrator.
	www.criticalnets.com /resources/vpn-client-trouble.html (2145 words)

	3Com Pushes RAS to the Edge - integrated NT server into Total Control Remote Access Concentrator - Product Announcement ...
		Corporations with large telecommuting employee populations have a problem: Every single remote access session adds to the amount of traffic running across their LANs, and requires extra CPU cycles from already overtaxed network servers.
		Managing remote access solutions, which may comprise heterogeneous components from various vendors, becomes a growing problem as well.
		By integrating a remote access concentrator together with a Windows NT server, 3Com enables administrators to insert an extra tier into the network hierarchy, on which frequently accessed data and applications can be placed.
	www.findarticles.com /p/articles/mi_m0FOX/is_18_2/ai_59450836 (649 words)

	Cisco - Configuring a Central Cisco VPN 3000 Concentrator to Allow Communication Between Spokes
		Communication is then enabled between the remote access VPN Client and the local LAN, behind the remote concentrator, through the central concentrator.
		Once the remote network is defined on the LAN-to-LAN configuration, it will be advertised on the central concentrator's internal routing table.
		Conduct further tests by initiating a ping from a host behind the VPN 3002 Hardware Client to a host behind the remote concentrator, and vice versa.
	www.cisco.com /warp/public/471/vpn3k_lan2lan.html (752 words)

	WatchGuard LiveSecurity
		But PPTP is a limited protocol designed for a specific mission, and it has serious security flaws, including weak password hashing, breakable keys, and unauthenticated control traffic.
		The problem is that PPTP is such an easy way to provide Internet-based remote access, admins can be lured into using it, and then they are hooked.
		But before you can truly secure your remote access, you have to admit your current remote access "lifestyle" hurts you, your network, your business, and your users.
	www.corecom.com /external/livesecurity/12steps.htm (1296 words)

	Cisco VPN 3000 Concentrator Vulnerability
		A vulnerability was reported in Cisco VPN 3000 Concentrator in the FTP file management function.
		A remote user can execute certain FTP commands.
		If the device is configured to use the FTP protocol to manage files stored on the concentrator, a remote user can execute the CWD, MKD, CDUP, RNFR, SIZE, and RMD FTP commands.
	www.vigilantminds.com /advi_detail.php?id=68 (101 words)

	Multiplexer, DSU, Data Concentrator, RS-232, mux
		The SRDC data concentrator multiplexes 8, 16, 24 or 32 asynchronous channels over a synchronous or asynchronous composite with the ability to operate over simplex or full duplex lines.
		The SRDC data concentrator composite is synchronous or asynchronous simplex or full duplex lines either analog or digital.
		The SRDC data concentrators are compatible with virtually all async terminal-printer/computer links.
	www.dcbnet.com /datasheet/srdcds.html (525 words)

	Reference Designs
		The RAC860 provides concentrator and server functionality to connect multiple WAN ISDN B-Channels to a LAN via a 10BaseT Ethernet connection.
		The MIDAS-PRI is one member of a growing family of MIDAS (Modular ISDN Data Access Solution) products that are designed specifically to meet the needs of OEMs for fast development of low cost ISDN products.
		The MIDAS-ULC is one member of a growing family of MIDAS (Modular ISDN Data Access Solution) products that are designed specifically to meet the needs of OEMs for fast development of low cost ISDN products.
	www.nine-9s.com /prod_midas.htm (259 words)

	Concentrator Remote Access Connections with PPTP, L2TP and WebVPN - Chapter 8 of Complete Cisco VPN Configuration Guide
		The Complete Cisco VPN Configuration Guide by Richard Deal teaches you how to use Cisco concentrators, routers, Cisco PIX and Cisco ASA security appliances and remote access clients to build a complete VPN solution.
		Chapter eight, excerpted here, focuses on using a concentrator to terminate other types of remote access sessions, including PPTP, L2TP over IPsec and WebVPN.
		It also looks at the configuration of the concentrator to support remote access VPN implementations.
	searchsecurity.techtarget.com /generic/0,295582,sid7_gci1162294,00.html (545 words)

	Cisco unveils new remote access concentrator
		The AS5800 is designed to allow enterprises to deploy multimedia applications and take advantage of VPN and quality-of-service (QoS) offerings from their service providers.
		Through the third quarter of 1997, Cisco held a 14.9% share of the $437.8 million in worldwide access concentrator revenue, up from 14.2% in the second quarter of 1997, according to Dell'Oro Group of Portola Valley, Calif.
		Learn how SecureLinx remote IT management products can quickly and easily give you the ability to securely manage data center equipment (servers, switches, routers, telecom equipment) from anywhere, at any time...
	www.networkworld.com /news/0224cisco.html (760 words)

	O'Reilly -- Safari Books Online - 078973026X - CSVPN Exam Cram™ 2 (Exam 642-511)
		I found the Appendix on the VPN 3000 Concentrator Menu hierarchy extremely helpful in my studies.
		The Appendix diagrams the Concentrator Menu options from the three root levels: Configuration, Administration, and Monitoring.
		The questions throughout the end of chapter quizzes and the full tests are difficult enough to help prepare you for the actual 642-511 CSVPN exam.
	safari.oreilly.com /078973026X (785 words)

	SecurityTracker.com Archives - Cisco VPN 3000 Concentrator Bug in HTTP Service Lets Remote Users Deny Service
		A remote user can send a small series of specially crafted HTTP packet to the target concentrator to cause the target device to halt and drop user connections.
		A remote user can also generate connections to the HTTP port to cause excessive memory and other resource consumption.
		As a result, concentrator may stall and drop user connections.
	www.securitytracker.com /alerts/2006/Jan/1015546.html (302 words)

	SkillSoft - Catalog - Detail
		To configure the Cisco VPN 3000 Series Concentrator for remote access using digital certificates
		identify how certificates are generated and transferred between a CA and the Cisco VPN 3000 Series Concentrator.
		configure remote access on the Concentrator using digital certificates.
	www.skillsoft.com /catalog/print.asp?CourseCode=201874_ENG (239 words)

	Cisco Secure Virtual Private Networking CSVPN Training Course online and CD
		Today's businesses are looking for ways to leverage Internet connectivity for connecting remote users and offices to the central network.
		Using the features of the 3000 series concentrator in conjunction with the hardware and software clients, students will learn how configure a security policy at the central site, that can then be dynamically pushed out to all the remote clients.
		In our engaging, interactive classroom, students will also learn how to automate the rollout of client software so that literally hundreds of hours can be saved using the techniques taught in class.
	www.netwind.com /html/csvpn-cisco-training-virtual-n.html (1270 words)

	Welcome To NEUTRONEXPRESS.COM
		Prices are for online orders only, $5 service charge will be applied to phone orders.
		Eight-Wire Synchronous Modem wiring allows concentrators to be installed in remote locations and connect to the host adapter via EIA-232 or EIA-422 synchronous modems, DSUs/CSUs, frame relay adapters, fractional T1s or ISDN terminal adapters.
		The EIA-232 synchronous modem cable is a twisted pair cable with a male HD-15 (high-density DB-15) connector at one end and a female DB-25 at the other end.
	www.neutronexpress.com /prod.cfm/19426 (122 words)

Try your search on: Qwika (all wikis)