FP-DD is short for SFP Double Densty, it is a new module and cage/connector system similar to current SFP module, but with an additional row of contacts providing for a two lane electrical interface. It is being developed by the SFP-DD MSA as a key part of the industry’s effort to enable high-speed solutions. The product will support DAC cables, optical modules and AOC’s, both legacy SFP+ and new SFP-DD styles.

The QSFP form factor is today’s industry workhorse for delivering 40 and 100GbE. The “Q” is for “quad” — a nod to the four-channel electrical interface, with each lane running at 25 Gbps for 100GbE. QSFP-DD adapts the same basic concept as its predecessor, but doubles the electrical contact density, via eight differential pairs capable of 50 Gbps each, to achieve 400GbE, while allowing existing QSFP modules to be plugged into the same cage.

The fiber distribution cabinet mainly been applied in the interface equipment of the joint point of the trunk cable and the distribution cable in the optical network. It provides the connection、 distribution and exchange function for the outdoor optical cable and can connect the optical cable and the optical fiber by using the movable splitter and splicing tray

Fibers SMC Outdoor Distribution Cabinet is used for cross connection and termination between trunk cables and distribution cable, especially for optical nodes in access network. It realizes fiber fixation, termination, distribution, reservation, splicing, branching, and patching.

Types of micro-tubes

The micro-tube is an important part of the gas blowing system, just like the road of the city, the micro-tube must be laid to the destination before the micro-cable is laid, and the requirement is laid in place. Because the 1th time of the micro-tube and the 2nd laying of the micro-tube has the possibility of winding, in a protective tube (protection tube: a pipe that protects a tube from a pipe, such as a silicon core tube for gas blowing, a PVC pipe for traction, a pipe for a local telephone pipe, The micro-tube in the pipeline for laying optical cables, such as grille pipes, can not be laid in batches, and at present there are about 2 kinds of micro-tubes at home and abroad:

The current network infrastructure is difficult to meet the exponential growth of data transmission requirements. Recently, the University College of London (UCL) has designed and tested a new optical receiver, which is expected to significantly reduce the cost of fibre-optic networks reaching home users, making each family directly connected to the global Internet.

Optical fiber cable has become a network wiring design is not a small part of its large capacity of communication, anti-jamming performance, strong security and other advantages, is widely used in the wiring network, in the face of market demand, optical fiber systems have entered the level and desktop applications.

The Philippines’ operator PLDT has announced plans to deploy advanced hybrid fiber technology to provide broadband services through conventional telephone lines in buildings and homes, foreign media reported.

In the third quarter of 2017, capital spending by telecoms operators continued to fall, while internet giants kept growing at a high rate, according to the latest study by Lightcounting, a market research firm. The report said that only 15 of the world's major operators, 2017 years, only the French telecom investment has maintained growth, the other 14 all fell; Internet companies, the investment in the cloud/data center, has increased the net investment of Alibaba, Facebook and Google by 142%, 62% and 39% respectively,

Recently, China's first high-speed railway through the Qinling-Xi Chenggao full line, in promoting the rapid economic development of the central and western regions, but also to the people travel brought great convenience and happiness. Xi Chenggao through the Qinling Super Specialty Tunnel has 7, up to 126 kilometers. Zhongtian technology for its provision of about 200 kilometers of high-quality leaky cable, to help the high-speed rail 4G communication coverage, so that participate in the interview report of the media reporters excited, released more than 430 reports, including the publication of the Micro-blog "I see Live in the tunnel" hands-on experience video news, aroused strong concern.