【正文】 信令網(wǎng)是電信網(wǎng)的三大支撐網(wǎng)之一，是電信網(wǎng)的重要組成部分，其 應(yīng)用十分廣泛。在信令網(wǎng)中所運(yùn)行的信令協(xié)議主要可分為：中國一號(hào)信令（隨路信令）和 信令（共路信令）。共路信令依據(jù)其自身的構(gòu)架而引發(fā)出了一些優(yōu)點(diǎn)：信令傳輸速度快；信令容量大；信道利用率高；信令易于管理和維護(hù)；易于開發(fā)一些基于信令的上層應(yīng)用。下面就著重介紹一下這三要素： 1） .信令點(diǎn)（ SP）：即為信令網(wǎng)中發(fā)送或接收信令 消息的實(shí)體。其三層結(jié)構(gòu)分別為：高級(jí)信令轉(zhuǎn)接點(diǎn) HSTP（分布在各主要省分）、低級(jí)信令轉(zhuǎn)接點(diǎn) LSTP（分布在地級(jí)市 ）、信令點(diǎn) SP（又稱為端局，一般分布在地級(jí)縣）；而雙平面結(jié)構(gòu)主要是為了提 高信令網(wǎng)的可靠性，我們一般采用 A、 B 雙平面結(jié)構(gòu)，即 HSTP一般都成對(duì)出現(xiàn)，并兩兩相連，這樣即使一個(gè) HSTP 故障了，另外一個(gè)還可以接替： 信令的承載方式有三種，分別為： TDM、 ATM 和 IP；其各自在承載層上有很大的不同，但這些不同對(duì)上層用戶來說是透明的。在我們移動(dòng)通信網(wǎng)絡(luò)中，都采用數(shù)字信令數(shù)據(jù)鏈路。而信令鏈路狀態(tài)監(jiān)視主要包括：信令單元差錯(cuò)率的監(jiān)視、處理機(jī)故障處理及信令鏈路故障處理和擁塞時(shí)的流量控制。 MTP2 層保證了兩個(gè)直接連接的信令點(diǎn)之間傳送信令消息的可靠性，但它對(duì)信令消息不作任何處理（從用戶層面上看，其實(shí) MTP2 層會(huì)向消息碼流中插入定位定界符和差錯(cuò)校驗(yàn)位）， MTP3 則是處理信令消息的最低一層。該公路上的車流不但有斷連和暢通的狀態(tài)，而且還有路由尋址的功能。在 信令系統(tǒng)中，信號(hào)信息可以是與一群電路有關(guān)的信號(hào)信息或是用于網(wǎng)絡(luò)管理的其他信息 ，因此， 信令系統(tǒng)實(shí)質(zhì)上是電信網(wǎng)中各個(gè)處理機(jī)之間用作傳遞信息的專用數(shù)據(jù)通信系統(tǒng)，而 信令網(wǎng)作為通信網(wǎng)的支撐網(wǎng)也可視為一個(gè)相對(duì)獨(dú)立的數(shù)據(jù)通信網(wǎng)。 信令系統(tǒng)還能在通信網(wǎng)中傳送呼叫控制、統(tǒng)計(jì)、計(jì)費(fèi)及其他維護(hù)管理信息 ,適合綜合業(yè)務(wù)數(shù)字網(wǎng) (ISDN)和智能網(wǎng)等新業(yè)務(wù)的使用。 信令網(wǎng)集中檢測(cè)系統(tǒng) 集中監(jiān)測(cè)系統(tǒng)采用分層的體系機(jī)構(gòu)，主要分為三層：數(shù)據(jù)采集和本地?cái)?shù)據(jù)預(yù)處理層；數(shù)據(jù)處理和存儲(chǔ)層，包括遠(yuǎn)端站、服務(wù)器中心站服務(wù)器和數(shù)據(jù)庫服務(wù)器；數(shù)據(jù)應(yīng)用層。 利用 信令監(jiān)測(cè)系統(tǒng)，我們能夠完成對(duì) 信令網(wǎng)的測(cè)試與維護(hù)、接通率和呼損統(tǒng)計(jì)分析、故障、告警和性能管理，實(shí)現(xiàn)對(duì)電話用戶的管理。另一輔助控制模塊 SACEN7 完成Level3 (第三級(jí) )的鏈路路由轉(zhuǎn)換功能。 結(jié)論 七號(hào)信令有著廣闊的應(yīng)用前景。 NO. 7 signalling system research In this paper The No. 7 signalling work is an important part of modern munication work, it supports the entire munication work business at present. Our country adopts No. 7 signalling work is business supporting work has a variety of functions, and has built a set of relatively perfect work system. Papers from No. 7 signalling work structure was introduced in detail our country currently in No. 7 signalling work maintenance and management work, is the No. 7 signalling work pipe system and the difference between the No. 7 signalling monitoring system, this paper introduces the SPC exchange in the No. 7 signalling system hardware and software configuration and maintenance, and the deficiency existing in the current work and the problems faced by the brief explanation. At the same time also sums up the NO. 7 signalling system in the future development direction. The introduction Strong monality of No. 7 signalling System (Signaling System No. 7) is the international telegraph and telephone consultative mittee (CCITT) in 1980, now No. 7 signalling through extended modified many times, has formed a plete System of Signaling. In the heart of the modern munication work users voice, data and control data transfer of control data (signaling) sent separately special transmitting signaling work is called the signalling work, No. 7 signaling work system is the signalling work system. No. 7 signaling work system is the core of the modern munication work, it supports the current all the business of the whole munication work, the telemunication work data work to the cellular telephone work the whole munication industry are dependent on the No. 7 signaling work system. No. 7 signaling work system itself is a data work, and provides a set of protocols and message types of standard, so all signaling and control information can be in the form of data message transmission and can support the infinite variety of data. No. 7 signalling work is one of the three supporting work of telemunication work, is an important part of telemunication work, its application is very extensive. So far our country has been established by senior signalling (HSTP), lowlevel signalling (LSTP) and a large number of signaling point (SP), consisting of tertiary really makes as neural work and supporting work of telemunication work. Therefore no. 7 signalling work operation quality directly affects the telemunication work and its various work operation stability and actual benefits. With the increasingly development of munication work, the transmission quality enhances unceasingly, digital munication has been widely used. Due to No. 7 signalling system has many wellknown advantages, No. 7 signalling gradually replaced with road signaling applications in the field of all kinds of munication, in our country has initially formed the independent No. 7 signalling work. Key words: signaling channel mobile munications work base station 1: the signal is divided into with road and road signaling two, ss7 is mon way signaling, said speech signal from a signaling message transmission, is at present our country mainly adopts technology. It has a large capacity of transmission, faster speed, the advantage of high channel utilization, to meet the demand of modern digital munication applications. First of all, introduced the munication work can be divided into work and work, and in the work and the munication work foundation. Run by the signaling protocol in the work can be mainly divided into: China39。 High channel utilization。 If they are receiving signaling messages, you can call the signaling point for the purpose of signaling point。 Their are quite different in the bearing layer, but the different is transparent to the upper user. TDM and ATM we called narrowband transmission and IP we called broadband transmission。 Their are quite different in the bearing layer, but the different is transparent to the upper user. TDM and ATM we called narrowband transmission and IP we called broadband transmission。 M), between it and the HSTP adopt the No. 7 link and x. 25 link connection, No. 7 news management link is used to pass SP points. C1 and C2 longdistance bureau through the No. 7 signaling links are connected to the NSC, system mainly plete: the No. 7 signalling work work structure graphics display。 The No. 7 signalling work incident reports and the corresponding malfunction alarm。 There are two kinds of TDM speed, a 64 k (E1 line in a certain time slot), another is 2 m (using E1 line 31 slots)。 There are two kinds of TDM speed, a 64 k (E1 line in a certain time slot), another is 2 m (using E1 line 31 slots)。 2) signalling (STP), was one of the signalling work entity, bu