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Title Date Added Company

Limitations of Transmission Distances Over Multimode Fiber 2008-04-01 Cisco Systems

Multimode fiber simply refers to the fact that numerous modes or light rays are carried simultaneously through the waveguide. One key characteristic of a multimode fiber is its modal bandwidth. It represents the capacity of a fiber to transmit a certain amount of information over a certain distance and is expressed in MHz/km. An intuitive model is to consider that the signal consists in a number of delayed lines, each of which corresponds to a particular mode. This paper details the limitations in transmission distances suffered by laser-based Gigabit networks operating near a wavelength of 1300nm over multimode fibers. The discussion focuses on the relationship between the actual fiber modal bandwidth and various launch conditions.

Complexity of Wavelength Assignment in Optical Network Optimization 2006-12-09 01:00:18 Alcatel-Lucent

This paper studies the complexity of a spectrum of design problems for optical networks in order to carry a set of demands. Under Wavelength Division Multiplexing (WDM) technology, demands sharing a common fiber are transported on distinct wavelengths. Multiple fibers may be deployed on a physical link. The basic goal is to design networks of minimum cost, minimum congestion and maximum throughput.

Cooperative Data-Optical InterNetworking: Distributed Multi-Layer Optimization 2006-12-09 01:00:18 Alcatel-Lucent

This paper presents a novel approach for joint optical network provisioning and IP traffic engineering, in which the IP and optical networks collaboratively optimize a combined objective of network performance and lightpath provisioning cost. A framework is developed for distributed multi-layer optimization. This framework is built upon the IP-over-Optical (IPO) overlay model, where each network domain has a limited view of the other. The formulation allows the two domains to communicate and coordinate their decisions through minimal information exchange. The solution is based on a novel application of Generalized Bender's Decomposition, which divides a difficult global optimization problem into tractable sub-problems, each solved by a different domain.

Line System Design for DWDM Networks 2006-12-09 01:00:18 Alcatel-Lucent

State-of-the-art Dense Wavelength Division Multiplexing (DWDM) allows data transport with very high capacity, measured in terabits per second, and very long reach, thousands of kilometers. One current DWDM technology arranges network elements into line systems, where a line system is a path consisting of alternating network elements and optical fibers. A line system is a linear sequence of network elements (OADMs) and fibers, all optically transparent. This paper describes algorithms for partitioning a DWDM mesh network into line systems, given a demand matrix.

External Storage Implementation and Best Practices White Paper 2006-12-27 01:00:55 Hewlett-Packard

This white paper gives three examples of the implementation of XP array external storage and the best practices related to their configuration and usage. The three examples - entry-level, mid-range, and enterprise-level - are intended to give the reader a better understanding of how external storage can be implemented in an efficient and cost-effective manner.

EuroFiber Enters Emerging Market With a Managed Dark Fiber Solution From Lucent and Partner Imtech 2006-11-29 01:00:19 Alcatel-Lucent

In 2003, EuroFiber recognized a major opportunity to provide dark fiber services down-market to small and medium business. The company developed a ring in their network with fast, one gigabyte Internet service, along with 10 channels of slower 100 megabyte service, for customers too small to use a complete fiber solution. EuroFiber manages its dark fiber network 24/7/365 via its own Network Operations Center (NOC), but it is not equipped to provide NOC service to manage the bandwidth service and to provide tech support to users. The company worked with Imtech, a Europe-based network equipment and services provider as well as a Lucent partner. Imtech then partnered with Lucent to provide with NOC services from the Lucent GNOC at Hilversum (in the Netherlands).

City of Melilla Installs IP Telephony to Cut Costs, Increase Productivity and Improve Service 2006-11-10 01:00:17 IBM

In the course of an extensive technology modernization, the city administration recognized that its telephone system was outdated. The Integrated Technology Services team deployed leading-edge Cisco gateways, adaptors, phones, faxes and software, but incorporated the city's existing fiber optic data network wherever possible. The centralized system's productivity enhancements include advanced functionality like caller ID, conference calling, call redirect, call waiting and call holding. A feature that automatically transfers calls to the first available administration employee allows the city to answer citizens' questions more quickly.

Telecoms Giant Enters the e-Services Market 2006-10-06 01:00:15 Hewlett-Packard

COLT Telecom Group plc is a leading provider of pan-European high bandwidth data, Internet and voice services. COLT Telecom Group needed quality products, flexibility, scalability and a reliable partner, with years of experience. They found that HP could give all these things to them. COLT customers now have fail-safe, secure Internet connection and hosting, messaging and e-services.

Inspection and Cleaning Procedures for Fiber-Optic Connections 2006-10-06 01:00:15 Cisco Systems

Clean fiber optic components are a requirement for quality connections between fiber optic equipment. One of the most basic and important procedures for the maintenance of fiber optic systems is to clean the fiber optic equipment. It is important that every fiber connector be inspected and cleaned prior to mating. This paper describes inspection and cleaning processes for fiber optic connections. The procedures in the paper describe basic inspection techniques and processes of cleaning for fiber optic cables, bulkheads, and adapters used in fiber optic connections.

New Generation NAS - Higher performance at lower cost 2006-08-17 12:13:07 Agami Systems

New generation NAS devices offer twice the performance at almost one tenth of the cost of existing enterprise-class fiber channel NAS devices. And, if your network supports Gigabyte Ethernet, new generation NAS devices are also designed to handle Gigabyte transfer rates.

There is considerable confusion when comparing the cost of devices in different capacities. The two key metrics that can help the comparison are Cost per Terabyte and Cost per MBps of throughput. New generation NAS devices cost one tenth per terabyte of capacity while cost per MBps drops down to about one fifth when compared with existing Fiber Channel NAS boxes.

The deal gets sweeter with the benefits of reduced network bandwidth using optimized advanced replication algorithms that make disaster recovery and continuous data protection a cinch. Ease of management is something that users are looking for progressively and the newer devices leave their current enterprise cousins behind.

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Title	Date Added	Company
Limitations of Transmission Distances Over Multimode Fiber	2008-04-01	Cisco Systems
Multimode fiber simply refers to the fact that numerous modes or light rays are carried simultaneously through the waveguide. One key characteristic of a multimode fiber is its modal bandwidth. It represents the capacity of a fiber to transmit a certain amount of information over a certain distance and is expressed in MHz/km. An intuitive model is to consider that the signal consists in a number of delayed lines, each of which corresponds to a particular mode. This paper details the limitations in transmission distances suffered by laser-based Gigabit networks operating near a wavelength of 1300nm over multimode fibers. The discussion focuses on the relationship between the actual fiber modal bandwidth and various launch conditions.
Complexity of Wavelength Assignment in Optical Network Optimization	2006-12-09 01:00:18	Alcatel-Lucent
This paper studies the complexity of a spectrum of design problems for optical networks in order to carry a set of demands. Under Wavelength Division Multiplexing (WDM) technology, demands sharing a common fiber are transported on distinct wavelengths. Multiple fibers may be deployed on a physical link. The basic goal is to design networks of minimum cost, minimum congestion and maximum throughput.
Cooperative Data-Optical InterNetworking: Distributed Multi-Layer Optimization	2006-12-09 01:00:18	Alcatel-Lucent
This paper presents a novel approach for joint optical network provisioning and IP traffic engineering, in which the IP and optical networks collaboratively optimize a combined objective of network performance and lightpath provisioning cost. A framework is developed for distributed multi-layer optimization. This framework is built upon the IP-over-Optical (IPO) overlay model, where each network domain has a limited view of the other. The formulation allows the two domains to communicate and coordinate their decisions through minimal information exchange. The solution is based on a novel application of Generalized Bender's Decomposition, which divides a difficult global optimization problem into tractable sub-problems, each solved by a different domain.
Line System Design for DWDM Networks	2006-12-09 01:00:18	Alcatel-Lucent
State-of-the-art Dense Wavelength Division Multiplexing (DWDM) allows data transport with very high capacity, measured in terabits per second, and very long reach, thousands of kilometers. One current DWDM technology arranges network elements into line systems, where a line system is a path consisting of alternating network elements and optical fibers. A line system is a linear sequence of network elements (OADMs) and fibers, all optically transparent. This paper describes algorithms for partitioning a DWDM mesh network into line systems, given a demand matrix.
External Storage Implementation and Best Practices White Paper	2006-12-27 01:00:55	Hewlett-Packard
This white paper gives three examples of the implementation of XP array external storage and the best practices related to their configuration and usage. The three examples - entry-level, mid-range, and enterprise-level - are intended to give the reader a better understanding of how external storage can be implemented in an efficient and cost-effective manner.
EuroFiber Enters Emerging Market With a Managed Dark Fiber Solution From Lucent and Partner Imtech	2006-11-29 01:00:19	Alcatel-Lucent
In 2003, EuroFiber recognized a major opportunity to provide dark fiber services down-market to small and medium business. The company developed a ring in their network with fast, one gigabyte Internet service, along with 10 channels of slower 100 megabyte service, for customers too small to use a complete fiber solution. EuroFiber manages its dark fiber network 24/7/365 via its own Network Operations Center (NOC), but it is not equipped to provide NOC service to manage the bandwidth service and to provide tech support to users. The company worked with Imtech, a Europe-based network equipment and services provider as well as a Lucent partner. Imtech then partnered with Lucent to provide with NOC services from the Lucent GNOC at Hilversum (in the Netherlands).
City of Melilla Installs IP Telephony to Cut Costs, Increase Productivity and Improve Service	2006-11-10 01:00:17	IBM
In the course of an extensive technology modernization, the city administration recognized that its telephone system was outdated. The Integrated Technology Services team deployed leading-edge Cisco gateways, adaptors, phones, faxes and software, but incorporated the city's existing fiber optic data network wherever possible. The centralized system's productivity enhancements include advanced functionality like caller ID, conference calling, call redirect, call waiting and call holding. A feature that automatically transfers calls to the first available administration employee allows the city to answer citizens' questions more quickly.
Telecoms Giant Enters the e-Services Market	2006-10-06 01:00:15	Hewlett-Packard
COLT Telecom Group plc is a leading provider of pan-European high bandwidth data, Internet and voice services. COLT Telecom Group needed quality products, flexibility, scalability and a reliable partner, with years of experience. They found that HP could give all these things to them. COLT customers now have fail-safe, secure Internet connection and hosting, messaging and e-services.
Inspection and Cleaning Procedures for Fiber-Optic Connections	2006-10-06 01:00:15	Cisco Systems
Clean fiber optic components are a requirement for quality connections between fiber optic equipment. One of the most basic and important procedures for the maintenance of fiber optic systems is to clean the fiber optic equipment. It is important that every fiber connector be inspected and cleaned prior to mating. This paper describes inspection and cleaning processes for fiber optic connections. The procedures in the paper describe basic inspection techniques and processes of cleaning for fiber optic cables, bulkheads, and adapters used in fiber optic connections.
New Generation NAS - Higher performance at lower cost	2006-08-17 12:13:07	Agami Systems
New generation NAS devices offer twice the performance at almost one tenth of the cost of existing enterprise-class fiber channel NAS devices. And, if your network supports Gigabyte Ethernet, new generation NAS devices are also designed to handle Gigabyte transfer rates. There is considerable confusion when comparing the cost of devices in different capacities. The two key metrics that can help the comparison are Cost per Terabyte and Cost per MBps of throughput. New generation NAS devices cost one tenth per terabyte of capacity while cost per MBps drops down to about one fifth when compared with existing Fiber Channel NAS boxes. The deal gets sweeter with the benefits of reduced network bandwidth using optimized advanced replication algorithms that make disaster recovery and continuous data protection a cinch. Ease of management is something that users are looking for progressively and the newer devices leave their current enterprise cousins behind.