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Avaya ERS 5500
The Ethernet Routing Switch 5500 Series or (ERS 5500) is a series of stackable, Layer 3 switches used in computer networking. The ERS 5000 was originally designed by Nortel and is now manufactured by Avaya. Up to 8 ERS 5000 Series Switches may be stacked in a 640 Gbit/s fast stacking configuration. This Switch was used as the access layer device for the 2010 Winter Olympics games. The 817 Access Switches supported 8782 Voice-over-IP telephones. The Switches have an integrated time-domain reflectometer (TDR) built into every copper port, providing diagnostic monitoring and troubleshooting capabilities of the connected cables allowing for the troubleshooting of cable defects (crimped, cut, shorted or damaged cables) from the telnet, SNMP, web and console management interfaces. This test provides a very reliable test to identify if the cable is good or faulty. The Switches also include an integrated packet sniffer built into every port that can export the information on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IP Flow Information Export
Internet Protocol Flow Information Export (IPFIX) is an IETF protocol, as well as the name of the IETF working group defining the protocol. It was created based on the need for a common, universal standard of export for Internet Protocol flow information from routers, probes and other devices that are used by mediation systems, accounting/billing systems and network management systems to facilitate services such as measurement, accounting and billing. The IPFIX standard defines how IP flow information is to be formatted and transferred from an exporter to a collector. Previously many data network operators were relying on Cisco Systems' proprietary NetFlow technology for traffic flow information export. The IPFIX standards requirements were outlined in the original RFC 3917. Cisco NetFlow Version 9 was the basis for IPFIX. The basic specifications for IPFIX are documented in RFC 7011 through RFC 7015, and RFC 5103. Architecture The following figure shows a typical architecture ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Research Triangle Park
Research Triangle Park (RTP) is the largest research park in the United States, occupying in North Carolina and hosting more than 300 companies and 65,000 workers. The facility is named for its location relative to the three surrounding cities of Raleigh, Durham, and Chapel Hill, or more properly, for the three major research universities in them: North Carolina State University, Duke University and University of North Carolina at Chapel Hill respectively. The Research Triangle region of North Carolina received its name as an extension of the name of the park. Aside from the three anchor cities, the park is also bounded by the communities of Morrisville and Cary. Approximately one fourth of the Park's territory lies in Wake County, but the majority of its land is in Durham County. Overview Research Triangle Park is one of the most prominent high-tech research and development parks in the United States. It was created in 1959 by state and local governments, nearby universities ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Power Over Ethernet
Power over Ethernet, or PoE, describes any of several standards or ad hoc systems that pass electric power along with data on twisted-pair Ethernet cabling. This allows a single cable to provide both data connection and electrical power to devices such as wireless access points (WAPs), Internet Protocol (IP) cameras, and voice over Internet Protocol (VoIP) phones. There are several common techniques for transmitting power over Ethernet cabling. Three of them have been standardized by Institute of Electrical and Electronics Engineers (IEEE) standard IEEE 802.3 since 2003. These standards are known as ''alternative A'', ''alternative B'', and ''4PPoE''. For 10BASE-T and 100BASE-TX, only two of the four signal pairs in typical Cat 5 cable are used. Alternative B separates the data and the power conductors, making troubleshooting easier. It also makes full use of all four twisted pairs in a typical Cat 5 cable. The positive voltage is applied to pins 4 and 5, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Syslog Server
In computing, syslog is a standard for message logging. It allows separation of the software that generates messages, the system that stores them, and the software that reports and analyzes them. Each message is labeled with a facility code, indicating the type of system generating the message, and is assigned a severity level. Computer system designers may use syslog for system management and security auditing as well as general informational, analysis, and debugging messages. A wide variety of devices, such as printers, routers, and message receivers across many platforms use the syslog standard. This permits the consolidation of logging data from different types of systems in a central repository. Implementations of syslog exist for many operating systems. When operating over a network, syslog uses a client-server architecture where a syslog server listens for and logs messages coming from clients. History Syslog was developed in the 1980s by Eric Allman as part of the Se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quality Of Service
Quality of service (QoS) is the description or measurement of the overall performance of a service, such as a telephony or computer network, or a cloud computing service, particularly the performance seen by the users of the network. To quantitatively measure quality of service, several related aspects of the network service are often considered, such as packet loss, bit rate, throughput, transmission delay, availability, jitter, etc. In the field of computer networking and other packet-switched telecommunication networks, quality of service refers to traffic prioritization and resource reservation control mechanisms rather than the achieved service quality. Quality of service is the ability to provide different priorities to different applications, users, or data flows, or to guarantee a certain level of performance to a data flow. Quality of service is particularly important for the transport of traffic with special requirements. In particular, developers have introduced Voice ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
10 Gigabit Ethernet
10 Gigabit Ethernet (10GE, 10GbE, or 10 GigE) is a group of computer networking technologies for transmitting Ethernet frames at a rate of 10 gigabits per second. It was first defined by the IEEE 802.3ae-2002 standard. Unlike previous Ethernet standards, 10 Gigabit Ethernet defines only full-duplex point-to-point links which are generally connected by network switches; shared-medium CSMA/CD operation has not been carried over from the previous generations Ethernet standards so half-duplex operation and repeater hubs do not exist in 10GbE. The 10 Gigabit Ethernet standard encompasses a number of different physical layer (PHY) standards. A networking device, such as a switch or a network interface controller may have different PHY types through pluggable PHY modules, such as those based on SFP+. Like previous versions of Ethernet, 10GbE can use either copper or fiber cabling. Maximum distance over copper cable is 100 meters but because of its bandwidth requirements, higher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Small Form-factor Pluggable Transceiver
Small Form-factor Pluggable connected to a pair of fiber-optic cables Small Form-factor Pluggable (SFP) is a compact, hot-pluggable network interface module format used for both telecommunication and data communications applications. An SFP interface on networking hardware is a modular slot for a media-specific transceiver, such as for a fiber-optic cable or a copper cable. The advantage of using SFPs compared to fixed interfaces (e.g. modular connectors in Ethernet switches) is that individual ports can be equipped with different types of transceiver as required. The form factor and electrical interface are specified by a multi-source agreement (MSA) under the auspices of the Small Form Factor Committee. The SFP replaced the larger gigabit interface converter (GBIC) in most applications, and has been referred to as a Mini-GBIC by some vendors. SFP transceivers exist supporting synchronous optical networking (SONET), Gigabit Ethernet, Fibre Channel, PON, and other c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avaya Device Manager
Avaya Holdings Corp., often shortened to Avaya (), is an American multinational technology company headquartered in Durham, North Carolina, that provides cloud communications and workstream collaboration services. The company's platform includes unified communications (UCaaS), contact center other services. The company provides services to 220,000 customer locations in 190 countries. History In 1995, Lucent Technologies was spun off from AT&T, and Lucent subsequently spun off units of its own in an attempt to restructure its struggling operations. ">/sup> Avaya was then spun off from Lucent as its own company in 2000 (Lucent merged with Alcatel SA in 2006, becoming Alcatel-Lucent, which was purchased in turn by Nokia in 2016). It remained a public company from 2000 to 2007. In October 2007, Avaya was acquired by two private-equity firms, TPG Capital and Silver Lake Partners, for $8.2 billion. On January 19, 2017, Avaya filed for Chapter 11 bankruptcy. On December 15, 2017, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Packet Analyzer
A packet analyzer, also known as packet sniffer, protocol analyzer, or network analyzer, is a computer program or computer hardware such as a packet capture appliance, that can intercept and log traffic that passes over a computer network or part of a network. Packet capture is the process of intercepting and logging traffic. As data streams flow across the network, the analyzer captures each packet and, if needed, decodes the packet's raw data, showing the values of various fields in the packet, and analyzes its content according to the appropriate RFC or other specifications. A packet analyzer used for intercepting traffic on wireless networks is known as a wireless analyzer or WiFi analyzer. While a packet analyzer can also be referred to as a network analyzer or protocol analyzer these terms can also have other meanings. Protocol analyzer can technically be a broader, more general class that includes packet analyzers/sniffers. However, the terms are frequently used interch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stackable Switch
A stackable switch is a network switch that is fully functional operating standalone but which can also be set up to operate together with one or more other network switches, with this group of switches showing the characteristics of a single switch but having the port capacity of the sum of the combined switches. The term ''stack'' refers to the group of switches that have been set up in this way. The common characteristic of a stack acting as a single switch is that there is a single IP address for remote administration of the stack as a whole, not an IP address for the administration of each unit in the stack. Stackable switches are customarily Ethernet, rack-mounted, managed switches of 1–2 rack unit (RU) in size, with a fixed set of data ports on the front. Some models have slots for optional slide-in modules to add ports or features to the base stackable unit. The most common configurations are 24-port and 48-port models. Comparison with other switch architectures ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
