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GSM network number plan

GSM networks are complex, including switching systems and base station systems. Exchange subsystems include HLR, MSC,Vlr, AUC, and EIR, and base station systems, other networks such as PSTN, ISDN, data network, and other plmn. To connect a call to a mobile customer, you need to call the corresponding entity. Therefore, correct addressing is critical to the numbering plan. 1. Mobile Station ISDN number (msis

Communication coding rules

. 1 numbering plan GSM networks are complex, including switching systems and base station systems. Exchange subsystems include HLR, MSC,Vlr, AUC, and EIR, and base station systems, other networks such as PSTN, ISDN, data network, and other plmn. To connect a call to a mobile customer, you need to call the corresponding entity. Therefore, correct addressing is critical to the numbering plan. This chapter introduces the numbering plan of various number

What kinds of access methods does the Internet have?

There are many ways to access the Internet, usually with the following access methods. 1. Access by public telephone network Use a phone line that connects your ISP, an account number, and a modem dial-up access. Its advantages are simple, low cost, the disadvantage is slow transmission speed, poor reliability of the line, affect the telephone communication. 2. Integrated Services Digital Network (integrated service Digital NETWORK,ISDN) Narrowban

The effect of physical DG Primary on adding/deleting tablespaces (data files) on Standby

disconnect from session; Database altered. ORCLPDG> select open_mode from v $ database; OPEN_MODE----------MOUNTED3. Cancel the REDO application and go to the read only status.ORCLPDG> alter database recover managed standby database cancel; Database altered. ORCLPDG> select open_mode from v $ database; OPEN_MODE----------MOUNTED ORCLPDG> alter database open; Database altered. ORCLPDG> select open_mode from v $ database; OPEN_MODE----------READ ONLYManage Primary database events that affect Stan

MySQL key mul-not readable

Http://dev.mysql.com/doc/refman/5.1/en/show-columns.htmlThe key field indicates whether the column is indexed:If key is empty, the column either is not indexed or is indexed only as a secondary column in a multiple-column, non-unique index.If key is PRI, the column is a primary key or is one of the columns in a multiple-column primary key.If key is uni, the column is the first column of a unique-valued index that cannot contain null values.If key is M

Analysis and learning of qmake using QT Solution

Qt solution is a third-party library, so this article will be helpful for writing third-party libraries.Directory structure The project. Pro of the project file is on the outermost layer, and common. PRI is on the outermost layer. The source code is in the SRC subdirectory, and the files are managed by project. PRI in the same directory. Buildlib. Pro under the buildlib directory is used to manage dynam

POJ 1273 Drainage ditches (network flow dinic algorithm template)

POJ 1273Given M-bar, N-points, the maximum flow from source 1 to meeting point N is obtained.This article is mainly attached dinic template, for future reference.#include #include#include#include#includestring.h>/*POJ 1273dinic algorithm template edges are forward, and there are heavy edges, and here the heavy edges are not to take Max, but to accumulate and*/using namespacestd;Const intinf=0x3f3f3f3f;Const intmaxn=201;intPRI[MAXN];Long LongSum//Calculate Total TrafficintS,t;//s: Source point t:

Perl Learning Data Collation 1th/4 page _ Application Tips

| +-----------+---------+------+-----+---------+----------------+ | ID | Int (11) | NO | PRI | NULL | auto_increment | | Time | Date | YES | | NULL | | | Enq1id | Int (11) | YES | | NULL | | | originid | Int (11) | YES | | NULL | | | Priceid | Int (11) | YES | | NULL | | | Paymentid | Int (11) | YES | | NULL | | | DELIVERY | Text | YES | | NULL | | | percent0 | Int (11) | YES | | NULL | | | Percent | Text | YES | | NULL | | | Price | Text | YES | | N

MySQL Database learning "Fifth" integrity constraints

without default); insert into server (Name,host,port) VALUES (' ftp ', ' 192.168.20.11 ', 8080); INSERT into server (Name,host,port) VALUES (' https ', ' 192.168.20.11 ', 8081); #ip和端口合起来唯一select * from server;Iv. primary KEY (PRIMARY KEY constraint)The value of the primary key field is not null and uniqueIn a table you can:Single-row keyMulti-column Master key (composite primary key)But there can only be one primary key in a table primary key============ single-row key ===============#方法一: Not

Linux Learning-Process Management

vim without actively deleting it. file.swpKILL-15 # Normal termination of a process, for example, for VIM, active deletion. FILE.SWP PS commandPS shows the health of the processPs-l # shows only the status of the process under the current bashPs-la # Displays information about all processes in the system, and each column field represents the following meanings F The flag of the process, which is the summary permission, 4 means that the permission is root,1 on behalf of

HDU2546 rice Card (backpack)

began to write in the form of 01 backpack, the maximum value of the value of M-dollar can buy itemsDP[J] =Max(DP[J],DP[J -pri[I]] +pri[I])Results for M-dp[m]But then I found out there was a problem, like this group.515 14 13) 13 4260Positive solution should m-5 >= 0 o'clock to buy as many items as possible, then the rest of the money to buy the most valuable items.1#include 2#include 3#include 4#include 5#i

HDU 4715 difference between Primes (prime table + two points)

on the line. However, it is very strange that I did not see the first to add fail unexpectedly also passed, but also drunk not.#pragmaCOMPRINT (linker, "/stack:1024000000,1024000000")#include#includestring>#include#include#include#include#include#include#include#include#include#include#defineLL __int64#defineFIN freopen ("In.txt", "R", stdin)using namespacestd;Const intmaxn=5000000;intPRI[MAXN],VIS[MAXN];intx,cnt;voidSieveintN) { intM= (int) sqrt (n+0.5); memset (Vis,0,sizeof(VIS)); for(int

IO event loop parsing and libevio event parsing in libev

we have added a new event to fd, not very familiar with */fd_event_nocheck (EV_A _ fd, revents);} fd_event_nocheck is as follows: Inline_speed voidfd_event_nocheck (EV_P _ int fd, int revents) {ANFD * anfd = anfds + fd; ev_io * w; for (w = (ev_io *) anfd-> head; w; w = (ev_io *) (WL) w)-> next) // checks the monitor on fd in sequence, {int ev = w-> events revents; // The event is triggered when the if (ev) // pending condition is met, add the monitor to the pendings [

An in-depth analysis of the limitations of Linux Ulimit

(sigrtmin), such as: Kill (Getppid (), sigrtmin);If it is not a real-time signal, it can only be received once.If we change the pending signals value to 2, it will only be guaranteed to suspend two signals, and the third signal will be ignored as follows:Ulimit-i 2./testParent Sleepingchild-bang!child-bang!child-bang!Woke up! R=0Handled ...Handled ...ExitingVI) The maximum value that can be created using POSIX Message Queuing, in units of bytes. (POSIX message queues)We test the limitations of

Unlimited level classification Increase

First, the database field must have an ID .... ParentID these fields How to make this look, this requires recursion, the add aspect of the controller should be written like this Public function Add () { $pri =d (' privilege '); if (is_post) { if ($pri->create ()) { if ($pri->add ()) { $this->success (' new permiss

DBA and RDBA Reprint

opc:0inc:0 exflg:0Itl Xid Uba Flag Lck SCN/FSC0x01 0x0003.011.000000f2 0x00805794.00c8.49--u-14 FSC 0x0000.0006bfdb0x02 0x0000.000.00000000 0x00000000.0000.00----0 FSC 0x0000.00000000Data_block_dump,data header at 0xed09464===============Tsiz:0x1f98hsiz:0x2epbl:0x0ed09464bdba:0x0100002076543210flag=--------Ntab=1Nrow=14Frre=-1fsbo=0x2eFseo=0x1d61Avsp=0x1d33Tosp=0x1d330xe:pti[0] nrow=14 Offs=0--The block holds 14 records. From row 0 to row 130x12:pri[

Common Cisco configuration commands and Parameters

) # ^ zConfigurationNovell IPX Routing Protocol: Novell RIP is updated once every 60 secondsRouter (config) # ipx routing [node address]Router (config) # ipx maximum-paths Paths Router (config) # interface Type PortRouter (config-if) # ipx network Network-Number [encapsulation-type] [secondary] Router (config-if) # ^ zConfigurationDDR:Router (config) # dialer-list Group-Number protocol Protocol-Type permit [list ACL-Number]Router (config) # interface bri 0Router (config-if) # dialer-group Group-

Describes the types and functions of switches for programmable users.

traffic load of the local telephone network. In addition, the user-controlled switch is set closer to the user in the evacuation settings of various units, thus shortening the user line interval and saving the user cable. At the same time, a small number of inbound and outbound trunk lines are used to access the local telephone network, which plays a role in traffic centralization. From these aspects, the use of user-controlled switches has a great economic significance, the type and function o

Learn more about programmable Switches

shortening the user line interval and saving the user cable. At the same time, a small number of inbound and outbound trunk lines are used to access the local telephone network, which plays a role in traffic centralization. From these aspects, the use of user-controlled switches has a great economic significance, the type and function of user-controlled switches. Therefore, in public network construction, the function of user-controlled switches cannot be lacking. The Skill Development Trend of

Explanation of IOS name meaning (1)

, SDLLC, STUN) F2 Enhanced FRAD subsets, such as VPN and OSPF. G G ISDN subset (SNMP, IP, Bridging, ISDN, PPP, IPX, AppleTalk) G2 Keep keeper proxy, voice, and video. G3 ISDN subset on c800 (IP, ISDN, FR) G4 Service Selection Gateway (SSG) G5

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