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DWDMOTN planning and Design of networks for America Movil in Central America..DWDMOTN Planning, Design and Implementation.Microwave engineering PDH SDH: 9500MPR 9600LSY MW Interference calculating MW Frequency planning and clear spectrum Support of DCN Implementation Completion of projects on time and on budget Kick-Off meeting planning.
Microwave engineering PDH SDH: 9500MPR 9600LSY MW Interference calculating MW Frequency planning and clear spectrum Support of DCN Implementation Completion of projects on time and on budget Kick-Off meeting planning, and presentation Customer presentations (Network capacity and project status) Privileged interlocutor with the customer (AMx, Claro) Site Building documentation. Customer presentations (Network capacity and project status). Alarm monitoring and microwave network supervision system, technical support to field technicians. Cancel anytime. Share this document Share or Embed Document Sharing Options Share on Facebook, opens a new window Share on Twitter, opens a new window Share on LinkedIn, opens a new window Share with Email, opens mail client Copy Text Related Interests Wavelength Division Multiplexing Optical Fiber Multiplexing Natural Philosophy Electronic Engineering Related searches Dwdm Skip section Trending Officer Off Limits Tessa Bailey Opal Jennifer L. 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For 50-GHz spacing, dielectric filters are hard to produce, as the requirements for slope and center of the passband are demanding targets to meet. From this definition comes the requirement for an optical network to conduct performance monitoring and channel routing in the physical optical layer. Achieving the goal of a multichannel-path, reconfigurable, all-optical network requires the deployment of several enabling technologies, such as optical crossconnects (OXCs), optical adddrop multiplexers (OADMs), chromatic dispersion-equalization modules (DEMs), polarization mode-dispersion (PMD) compensators, and optical-performance monitors (OPMs). Whether a network is based on point-to-point, mesh, or ring topologies, its optical elements can be strategically placed to perform such tasks as performance monitoring, performance optimization, and optical routing. Performance monitoring is accomplished by OPMs that are able to measure the characteristic optical parameters of a dense wavelength-division multiplexing (DWDM) signal and inform the network-management layer of the networks state of health. Performance optimization of the optical carriers is performed by DEMs and PMD-compensation modules that are able to reduce the harmful effects of chromatic dispersion and PMD in the route. Path routing at the adddrop node is attained by employing OADMs and OXCs to reconfigure network pathways to either balance capacity or, in the event of a severed link, initiate an optical-protection switch and avert a service interruption. The ADM is the basic building block of fiber-optic network architectures that employ either unidirectional or bidirectional traffic configurations. Existing architectures based on the Synchronous Optical NetworkSynchronous Digital Hierarchy (SONETSDH) ADM use an electrical multiplexer that employs time-division multiplexing (TDM) to combine multiple inputs with varying subsidiary bit rates to the OC-N rate of the backbone network. At any adddrop site, only the data that need to be accessed are dropped, while the data to be inserted are time-division multiplexed with the rest of the through traffic and passed to the next node. With the recent appearance of DWDM optical carriers in the same fiber, the adddrop function is now best managed in the optical layer. In this case, the required data are accessed by optically filtering a wavelength channel from the channels entering the node. The same optical carrier can be used as the add channel for data to be inserted into the network at that node. ![]() Each wavelength channel (at various OC-N rates) can be dropped or added without the need to multiplexdemultiplex TDM signals in the electrical layer. Another feature of wavelength adddrop is that wavelength-based services can now be offered, with the added economic advantage of being able to lease a wavelength channel instead of an entire fiber. As the OADM site is a node where the DWDM optical carriers are amplified, generated, and routed, a majority of an optical networks functions occur at this node. A schematic of an adddrop site with optical-networking components such as the tunable OADM, channelized tunable DEM, and the OPM appears in Figure 1. These modules are compact, rugged, and wellsuited for embedded-system application. Furthermore, as each of these modules uses fiber Bragg gratings (FBGs) as a core component, they ultimately benefit from the advantages of in-fiber devices such as low insertion loss and minimal package integration. Fig. 1. Placement of optical modules for optical networking at an adddrop node. The tunable OADM shown in Figure 1 can add or drop either a single wavelength channel or multiple channels. In the future, as more routing responsibility is shifted to the optical domain, the tunable OADM will need to undergo a smooth transition from a static configuration to one that is reconfigurable and eventually to one that enables dynamic operation. This evolution will allow the network-management layer to reconfigure the different wavelength paths to either avert a service interruption caused by a faulty span or simply balance the networks utilization to improve transport efficiency. Current OADM schemes are based on thin-film dielectric filters, acousto-optic tunable filters, arrayed waveguide gratings, or FBGs. Dielectric filters have been actively deployed as OADMs for systems with channel spacing of 100 GHz and above.
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