International Telecommunications Union ITU Having announced ” the world ICT faithful record of 2013 years ” on February 27, this report predicts, the whole world moves user’s quantity of cellular communications and reaches the global population soon, the saturation of the market will result in increasing and slowing down; And the steady decline of price has promoted broadband Internet to popularize. ... Read more
The network communications usually have particular agreements, then, we come to see some contents of VoIP procotol now. In VoIP procotol, what we used is H.323, SIP, MEGACO and MGCP. Among them, SIP believes everybody can not be strange. We will introduce other agreements briefly too. ... Read more
As TD-SCDMA enters the large-scale commercial experiment, WiMAX joins ITU and becomes the 4th 3G standard, Ericsson takes the lead in finishing LTE the whole chain to transmit and test at a high speed, IMT-Advanced motion at the beginning was collected, the situation that many standards coexist has appeared more and more in mobile communication. In reality often on a station location, there are many kinds of standard base stations such as air shower, CDMA, GSM, TD-SCDMA at the same time. How to reduce to research and develop the production cost, reduce and build, run, safeguard and upgrade the cost, common subject that become the apparatus manufacturer and the operator faces. As to this, base station the intersection of apparatus and manufacturer propose, face the whole the intersection of IP and many the intersection of mould and wireless base station, realize GSM, UMTS, CDMA, the intersection of WiMAX and many the intersection of module and large mode base stations, thus can realize the smooth gradual progress, from 3G standard after upgrading to HSDPA/HSUPA even LTE,etc. that 3G standards such as existing TD-SCDMA, WCDMA,etc. are smooth. ... Read more
The summary starts with suffused with the network concepting, is analyzing and is suffused with on the basis of relation between network, thing networking, relevant network concept of sensor network, further introduce and is suffused with in the standardized situation at home and abroad of the network, provide and is suffused with in the standardized trend of the network. ... Read more
[In digital TV era of leaderette ], various interdynamic application, value-added service arise at the historic moment. As supporting the business and the middle one employed, countries all over the world district Have all taken active action and made the relevant standard with technical standard organization. Understand and is chosen the appropriate standard correctly, as the development basis of enterprise or unit product and business, put up the intersection of operation and environment that open as much as possible, cross over as to digital the intersection of TV and the intersection of industry and sound development and fusion type of chain essential. ... Read more
At present, our country, to the communication bandwidth, especially the demand for the bandwidth of long distance communication is very large, so domestic every large telecommunication run commercial city, build widely coverd transmitting the intersection of capacity and loud long-distance DWDM transmission network. But because long-distance the intersection of DWDM and transmission network have the intersection of region and large transmitting from long, the intersection of relaying and the intersection of link and many the intersection of grade and characteristic span, once go wrong, especially while transmitting the degradation question of performance, the localization of the problem is with dealing with the difficulty with very great existence, in view of this, the collection of the performance data and analytical work of the performance that must pay attention to the network and run in the daily maintenance work of the long-distance transmission network, in order to find and handle the hidden danger in time, prevent trouble before it happens. Face the same problem in the maintenance work of Shaanxi Province Branch long-distance DWDM transmission network of CHINAUNICOM too. So this text, with will it be August 2008, first class arterial Beijing that our company launch breathe out too west the intersection of wave and the intersection of subsystem and Suide, go to the intersection of Xi’an and sections of mere the intersection of performance and analytical work for example, carry on the discussion to the problems in this respect. ... Read more
Recently, the revision edition newly which International Telecommunications Union ITU-T proposed through the crooked insensitive form mould optic fibre G.657 standard. There were greater changes than 2006 edition to revised the product classification in the edition this time, in order to lead relevant optic fibre manufacturer, optical cable manufacturer, users and researchers,etc. to understand this standard for proposing better, this text revise content go on, explain and prove, define long to fly to EasyBand, G.657 of company, at the same time newly on the intersection of ITU-TG.657 and standard Serial optic fibre and corresponding relation, technological characteristic and value of the international standard make a reservation. ... Read more
Moving broadband and moving towards each corner in the world, during ITU Geneva exhibition that has just finished, the data that ITU announces reveal, at the end of 2010, it is estimated the whole world will move the number of users of broadband and will be up to 600 million, exceed fixed the intersection of broadband and number of users greatly ‘ It is about 500 million in the same period ,Moving broadband is becoming and changing the global telecommunication industry and even key factor of the information service industry. Behind outdoor space, family expect become global mobile communication industry, especially the whole business and next important battle field to move broadband. ... Read more
Technological characteristic of 1PTN ... Read more
