There’s been a lot of talk lately surrounding bidirectional 40 Gb/s duplex applications, or BiDi for short. Currently offered as a solution by Cisco®, BiDi runs over duplex OM3 or OM4 multimode fiber using QSFP modules and wavelength division multiplexing (WDM) technology. It features two 20 Gb/s channels, each transmitting and receiving simultaneously over two […]
TV and video services in FTTx triple play service
As telcos turn to triple-play services (video, voice and high-speed internet access) to reduce churn and increase revenue, they need to find a way of delivering TV and video to the end-user as cost-effectively as possible. Each of the major point-to multi point PON variants – BPON, GPON and EPON – offers two different methods […]
WDM & Next Generation Optical Networking Africa is the newest addition to the highly successful WDM World Series.
Showcasing the rapid growth in the optical market in Africa, the conference will bring together insights and experience of operators and vendors assessing the massive technical challenges the industry faces to deliver high speeds, and ensure that networks are fast enough to handle the current and anticipated traffic demands. WDM & Next Generation Optical Networking […]
The diﬀerences between SDH and SONET
SDH stands for synchronous digital hierarchy. SDH is the synchronous technology used everywhere except the US, Canada and Japan. Development of this international counterpart to SONET began a few years after SONET. The diﬀerences between SONET and SDH are based primarily on the diﬀerent asynchronous bit rates that must be mapped into them. In developing […]
6 reasons why SONET
With the introduction of PCM technology in the 1960s, communications networks were gradually converted to digital technology during the years that followed. To cope with the demand for ever-higher bit rates, a multiplex hierarchy or plesiochronous digital hierarchy (DSn) evolved. The bit rates start with the basic multiplex rate of 1.5 Mb/s with a further […]
7 Reasons Why SDH (Synchronous Digital Hierarchy)?
Communications networks gradually converted to digital technology after PCM was introduced in the 1960s. A multiplex hierarchy known as plesiosynchronous digital hierarchy (PDH) evolved to cope with the demand for everhigher bit rates. The bit rates start with the basic multiplex rate of 2 Mbps with further stages of 8, 34, and 140 Mbps. In […]
Wavelength Division Multiplexing (WDM)
WDM Introduction WDM dramatically expands the total capacity of an optical network by enabling a large number of independent wavelength channels to travel within the same network. This core technology allows network capacity to be gradually and cost effectively increased while flexibly allowing multiple generations of transmission technologies to be supported on the same network […]
DWDM Disadvantages and DWDM Advantages
DWDM Advantages and DWDM Disadvantages Breif introduction about DWDM Fiber with great capacity of bandwidth for long haul back bone data transmission. and DWDM, which is short for Dense Wavelength Division Multiplexing. is one of the dominant technology used to utilize the application of fiber cable. It means multiplex a group of wavelengths into and […]