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The emergence of high-definition television (HDTV), IPTV, and video-on-demand services, along with the advent of peer-to-peer video applications, has placed a strain on the bandwidth requirements and operational efficiency of [...]

When it comes to network reconfigurability, there seems to be a gap between the capabilities network architects say they want and the attributes of the devices network operators actually are [...]

Dispersion-tolerant transmission promises to become a popular request as metro and regional networks transition to 10 Gbits/sec--and perhaps a necessity as carriers implement reconfigurable optical add/drop multiplexers (ROADMs). Several module [...]

Enterprises increasingly rely on networked applications to improve productivity. Enterprise IT staffs have scaled internal LANs to accommodate the rise of high-bandwidth applications, including Internet access and business continuity. Upgrading [...]

Remote reconfigurability of the optical transport layer has the potential to significantly lower operations expenses in metro, regional, and long-haul networks. Recognizing this potential, recent service-provider-network RFPs have included requirements [...]

CWDM systems are considered a low-cost alternative to DWDM systems. They take advantage of low-cost, uncooled distributed feedback (DFB) lasers and less stringent wavelength multiplexing and demultiplexing components. Individual CWDM [...]

DWDM Equipment Equipment Model Type ADVA AG Optical Networking D-82152 Martinsried Munich, Germany 49-89-8906650 FSP 500 Managed fiber service - platform FSP 1000 Optical feeder system - FSP 2000 Scalable [...]

With all of the excitement surrounding the high end of the T1/T3 multiplexer market, the quieter, traditional T1 market is sometimes overlooked. The whiz-bang glitz that once surrounded these technologies […]

Improved technology and speed coupled with price reductions enable modems to compete with digital services, while muxes remain viable for small network applications. Modems and multiplexers continue to be the […]

Multiplexing and switching products are generally considered the 'heart' of widebrand networks. In fact, there are so many of these products that they are broken out into separate tables. In […]

By all accounts, reconfigurable optical add/drop multiplexer (ROADM) technology has become mainstream. First adopted by the cable multiple-system operators (MSOs), ROADMs now are finding applications in ILEC, CLEC, IOC, mobile [...]

While not as complex as the typical T1 multiplexing system, the basic CSU (channel service unit) is just as integral a part of the T1 network. Sometimes referred T1 mode […]

Over the past decade, digital wideband technology has become the preferred method of wide area networking for the majority of corporate America. The reason is simple: it's cheaper! The carriers […]

Multiplexing and switching products are generally considered the 'heart' of wideband networks. Table 1 lists suppliers of most of these types of systems broken into a few general categories. We […]

Low-bit-rate voice has user benefits but what is is future? Low bit rate voice--the technology of transmitting voice conversations over digital facilities with far less than the traditional 64-kbps per […]

New factors drive resurgence of X.25 packet switching Packet switching and statistical multiplexing are very much alive. Statistical multiplexing remains the economical solution for networks that do not carry enough […]

How to choose a networking T1 multiplexer As the networking T1 multiplexer market reaches maturity, the task of choosing a multiplexer is becoming more and more difficult. The decision-making process […]

The industry has been buzzing about reconfigurable optical add/drop multiplexers (ROADMs) since SuperComm 2004, which proved to be a coming out party of sorts for the technology. Today, a new [...]

Thin-film filters (TFFs) and arrayed wave-guide gratings (AWGs) are the two major optical platforms for DWDM multiplexer/ demultiplexers. AWGs have the advantage of semiconductor batch processing and thus of fer [...]

Since the bursting of the telecom bubble, some industry insiders have been ready to eulogize SONET/SDH as an outdated and outmoded technology. All sources interviewed here agree that the need [...]

Reconfigurable optical add/drop multiplexers (ROADMs) have been hailed as an essential building block lot the next generation of DWDM networks. Analyst firms are predicting huge increases in ROADM revenue and [...]

The worst of the telecommunications shakeout may be over, but carriers have not returned to the level of network investment, or revenues, of just a few years ago. While capital [...]

British Telecom (BT--London)recently announced its decision to migrate its multiple existing networks to a single converged multiservice IP-based network, dubbed the 21st Century Network. AT&T (Bedminster, NJ) is moving ahead [...]

Wavelength-Division Multiplexers Number of Model Wavelengths Accelink Technologies Co Ltd Wuhan, Hubei, 430074 People Republic of China 86-27-87693944 DWDM-1-40-21-025-0.5-SC/PC 40 OADM-1-8-21-09-0.5-SC/PC 8 ADC Eden Prairle, MN 55344 952-938-8080 Dense WDM [...]

Weathering the telecommunications storm is challenging, even for established suppliers. So how's a company coming out of stealth mode going to make it in this market? 'For me the fundamental [...]

Carriers today are less preoccupied with 'new generation' technology and net-works and more with the lowest cost for delivering bandwidth. Lower startup cost, lower expansion cost, and lower operating expenses [...]

Although not as complex as typical T1 multiplexing systems, the channel service unit (CSU) is an integral part of the T1 network. Sometimes referred to as the 'T1 modem' because […]

Marvell (Sunnyvale, CA), a broadband communications solutions developer, announced that Lucent Technologies (Murray Hill, NJ) has selected Marvell's GalNet-3 converged voice/video/data switch processors for its ADM 16/1c WaveStar SDM multiplexer [...]

CODEON Corp. (Columbia, MD), a designer and manufacturer of modules for the fiber-optic telecommunications industry, announced Ciena Corp. (Linthicum, MD) has selected its 12.5-Gbit/sec intensity modulator for use within the [...]

The Chromatica series of high-channel-number optical multiplexers/demultiplexers is based on the company's VPG technology and features compact 16-, 32-, and 40-channel DWDM modules designed and manufactured for OEM integration. These [...]

The worldwide market for DWDM multiplexer/demultiplexer components in telecommunications applications is forecast to decline 22% in 2001, according to a new report by market researcher Strategies Unlimited (Mountain View, CA). [...]

The IQ-12004B DWDM passive component test system accurately characterizes critical specifications -- spectral insertion loss, polarization dependent loss, and optical return loss--of a DWDM passive component. The system sweeps a [...]

The GIGALight is a DWDM solution for transporting multiple Gigabit Ethernet, SONET, and/or ATM data streams over a single fiber. The product supports a variety of digital transport applications, including [...]

The NTK3655 and NTK3656 series are FMFDM-based multiplexers that transmit four video channels one way and duplex audio and data on one fiber. Marketed for security/surveillance and ITS, they are [...]

K2 Optronics, Inc. (Sunnyvale, CA), a developer of components and modules for the optical-networking industry, and Flextronics (Singapore), an operational .services provider, announced the signing of a strategic agreement to [...]

Lucent Technologies (Murray Hill, NJ) announced a one-year, $90-million agreement with TyCom Ltd. (Morristown, NJ) for optical-networking systems and services. The agreement includes deployment of the Lucent WaveStar OLS 1.6T [...]

These programmable devices provide flexibility while removing costly OEO conversions. The all-optical network (AON) revolution has begun in many parts of the world, and its ideology is the heart and [...]

This programmable optical add/drop multiplexer (OADM) combines thin-film, DWDM, and opto-mechanical switch technologies with a user-friendly electronically controlled interface. It can dynamically add or drop any/all operating channels remotely or [...]

The AQ6141 multiwavelength meter provides wavelength accuracy of 0.3 pm and has a minimum resolution separation of 5 GHz. It is suitable for testing DWDM systems and corresponds to 25-GHz [...]

The LightWeaver VOA (variable optical attenuator) multiplexer provides the functionality of VOA arrays and an AWG in one device. It combines up to 40 VOAs with an AWG multiplexer replacing [...]

The Chromatica series of high-channel-Count optical multiplexer/demultiplexers is based on patented proprietary VPG technology and features 16-, 32-, and 40-channel DWDM modules designed and manufactured for OEM integration. The 100-GHz [...]

This 160-channel 25-GHz channel-spacing DWDM solution integrates a 1x4 25-GHz WaveProcessor Interleaver with four 40-channel, 100-GHz WaveArray AWGs to create a 160-channel demultiplexing solution. The product addresses the need of [...]

The ROADM (reconfigurable optical add/drop multiplexer) is based on passive planar waveguide components and their InP-based active components. It can add or drop any number of channels. Passive arrayed waveguide [...]

The optical service node (OSN) 4400 is an add/drop multiplexer for high-speed fiber-optic access and transport networks that offers 20-Gbit/sec total trunk capacity. It offers a full suite of service [...]

The EBE-20 brings WDM bandwidth expansion technology to any Gigabit Ethernet 1.25-Gbit/sec multimode or singlemode LAN. The product directly interfaces with up to 16 Ethernet switches using industry-standard duplex SC [...]

The use of higher-order modulations together with subcarrier multiplexing provides inherent capabilities and features highly attractive to network operators. Demand for more flexible bandwidth creation at lower cost is causing [...]

Used successfully in undersea applications, extreme long-haul systems, due out later this year, face new challenges in terrestrial applications. The DWDM industry has undergone tremendous change since the early 1990s, [...]

The lambdaXchange optical switching system uses all-optical wavelength conversion, eliminating the need for intermediate electrical conversions and regeneration within backbone transport networks, according to the company. The all-optical switch enables [...]

The company's patented v-callimator thin-film-filter technology has enabled the release of an all-passive, filter-based, high-isolation, 50-GHz optical add/drop multiplexer. This series of add/drop modules achieves -1-dB pass-band bandwidth minimum of [...]

The eXpander system integral expands the usable bandwidth of fiber into the S-band. The expander is capable of 96 channels of 10-Gbit/sec transmission at 50-GHz spacing. The benefit for carriers [...]