gsm

（整理来自维基百科，未来还有更多号段，持续更新中…） 手机号码： 中国内地手机号码以1开头（未来预留92和98开头），共11位数，前7位数字通常称为手机号段。手机号段类似于地区电话区号，但又不完全相同。2010年11月之前，一般可以从手机号段直接区分城市归属地和运营商。 号码分配： 中国移动 中国移动共计23个号段，因4G普及USIM手机卡的推广，除144/148/172号段为物联网业务专用号段外，其他号段现已均为GSM（2G）、TD-SCDMA（3G）、LTE／LTE-A（4G）混合号段。未来还将有5G号段，持续更新中。 号段 网络 卡类型 134-0~8 LTE/TD-SCDMA/GSM USIM手机卡 135 LTE/TD-SCDMA/GSM USIM手机卡 136 LTE/TD-SCDMA/GSM USIM手机卡 137 LTE/TD-SCDMA/GSM USIM手机卡 138 LTE/TD-SCDMA/GSM USIM手机卡 139 LTE/TD-SCDMA/GSM USIM手机卡 1440X LTE/TD-SCDMA/GSM USIM数据卡（物联网业务专用号段） 147 LTE/TD-SCDMA/GSM USIM数据卡 中国移动香港一卡双号储值卡内地号码 148XX LTE/TD-SCDMA/GSM USIM数据卡（物联网业务专用号段） 150 LTE/TD-SCDMA

So I've got a website that serves ~1000 users, coordinating scheduling for events. I'd like to enable our system to send SMS messages to users. I have access to the server and would like to purchase and install a GSM modem instead of subscribing to some SMS Gateway service. What I gather so far is that I need to purchase the modem, and obviously a SIM card for that modem, and then a subscription for that SIM card. Question 1 probably shouldn't go in StackOverflow, but I'll ask just in case... Do cellular service providers usually have unique subscription plans for companies or organizations

I am trying to use GPRS functionality of the GSM/GPRS modem for sending data to the remote server but i am unable to do so.I had posted a question on Arduino Forum but didn't get any reply. Here is the link for the question . Well my Main concern is i) I am using a GPRS/GSM Modem and i am not sure about the Power requirements of the Modem.At present i am using a 9V and 1 amp supply but the network LED on the modem is dignifying that Modem is not getting the network. So can this be because of the insufficient supply to the modem? I very much doubt it's a power thing. Although I have limited

I have some problem with my project. I am using SIM800L and GPS Neo6MV2 with arduino genuine uno. My project is sending GPS location by message. But, the message i received only contained long = 0,000000 lat = 0, 000000. Here is my code: #include <TinyGPS++.h> TinyGPSPlus gps; //float latitude, longitude; int myled=13; #include <SoftwareSerial.h> SoftwareSerial SIM800L(7, 8); //SoftwareSerial gps_serial(2,3); String response; int lastStringLength = response.length(); String latitude, longitude; String link; void setup() { Serial.begin(9600); Serial.println("GPS Mulai"); SIM800L.begin(9600);

I am trying to make a program to send a sms. I wrote the program but doesn't successfully send the message. My program send an At command to the Port COM in my computer but I do not get a response from my gsm modem. I am using COM terminal (Temp pro...) to send sms with the at command and I am able to send sms. Therefore I don't know why the program can't send a sms. import java.io.*; import java.util.*; import gnu.io.*; public class prawiefinal { static Enumeration portList; static CommPortIdentifier portId; static String messageString = "AT+CMGF=1 \r"; static String messageString2 = "AT+CMGS

序言   本次实习的主要内容是移动通信的核心侧和无线侧两部分，实习时间是2017年6月12日至2017年6月30日。实习过程中核心侧部分主要认识华为WCDMA 3G移动核心侧设备MSoftX3000、UMG8900、HLR9820、SGSN9810、GGSN9811等设备的外观及结构，了解其型号、参数、性能指标和运行情况；认识移动核心侧设备的基本组成，认识WCDMA核心网网元设备及各个单板的认识，加深理解移动核心侧设备在整个通信网中的地位；无线侧部分认识华为WCDMA 3G移动通信无线侧设备DBS3900、BSC6810等系列设备的外观及结构，了解相关设备的型号、参数、性能指标和运行情况；认识华为DBS3900、BSC6810等设备内各单板的位置和作用，加深理解移动无线侧设备在整个通信网中的地位；以此来加强课程学习中对移动通信理论内容的理解，为今后的学习和工作打下基础。 移动通信核心侧 移动通信核心侧实习目的和要求 实习目的 了解WCDMA全网拓扑结构； 认识华为WCDMA 3G移动核心侧设备MSOFTX3000、UMG8900、HLR9810等设备的外观及结构； 认识核心侧设备的基本组成，了解WCDMA核心网网元设备以及各种单板； 掌握移动通信核心网的通信原理； 熟悉移动通信系列设备的构成、性能、作用及运行情况； 实习要求 要求能独立完成MSOFTX3000的数据配置

I'm trying to make use of a mobile information about neighbouring cells, available on Android via TelephonyManager class and its getNeighboringCellInfo method. Below I'm posting a part of code (mostly taken from publicly available sources) which does the job, and one example of output which this code produces (shown in attached screenshot). The code and the image are placed "as is" without any changes, so it should be relatively easy to associate one with the other and make sure it should work correctly (of course, there can be errors which I overlooked). The problem is that the list of