TC35i新版西門子工業GSM模塊是一個支持中文短信息的工業級GSM模塊,工作在EGSM900和GSM1800雙頻段,電源范圍為直流3.3～4.8V ,電流消耗——休眠狀態為3.5mA，空閑狀態為25mA，發射狀態為300mA(平均)，2.5A峰值；可傳輸語音和數據信號, 功耗在EGSM900(4類)和GSM1800(1類)分別為2W和1W ,通過接口連接器和天線連接器分別連接SIM卡讀卡器和天線。SIM電壓為3V/1.8V，TC35i的數據接口(CMOS電平)通過AT命令可雙向傳輸指令和數據,可選波特率為300b/s～115kb/s , 自動波特率為1.2kb/s～115kb/s。它支持Text和PDU格式的SMS(Short Message Service,短消息),可通過AT命令或關斷信號實現重啟和故障恢復
上傳時間： 2016-08-26
上傳用戶：fnhhs
SIP（Session Initiation Protocol）是由IETF定義，基于IP的一個應用層控制協議。由于SIP是基于純文本的信令協議，可以管理不同接入網絡上的會晤等。會晤可以是終端設備之間任何類型的通信，如視頻會晤、既時信息處理或協作會晤。該協議不會定義或限制可使用的業務，傳輸、服務質量、計費、安全性等問題都由基本核心網絡和其它協議處理。SIP得到了微軟、AOL、等廠商及IETF和3GPP等標準制定機構的大力支持。支持SIP的網絡將提供一個網橋，以擴展向互聯網和無線網絡的各種設備提供融合業務能力。這將允許運營商為其移動用戶提供大量的信息處理業務，通過SMS互通能力與固定用戶和2G無線用戶交互。SIP也是在UMTS3GPP R5/R6版本中使用的信令協議，因此可以保護運營商目前的投資而及具技術優勢和商業價值。 SIP的技術優勢 *獨立于接入：SIP可用于建立與任何類型的接入網絡的會晤，同時還使運營商能夠使用其它協議。 *會晤和業務獨立：SIP不限制或定義可以建立的會晤類型，使多種媒體類型的多個會晤可以在終端設備之間進行交換。 *協議融合：SIP可以在無線分組交換域中提供所有業務的融合協議。
標簽： Initiation Protocol Session IETF
上傳時間： 2016-08-26
上傳用戶：我干你啊
sim300的at指令集，用于控制sim300完成GPRS數據傳輸，SMS接收發送，語音通話等功能
上傳時間： 2016-08-27
上傳用戶：TF2015
很好用的，短信發送平臺，A simple UNIX client Allowing you to send SMS messages to mobile phones and pagers
標簽：
上傳時間： 2016-09-23
上傳用戶：han_zh
The MAX481E, MAX483E, MAX485E, MAX487E–MAX491E, and MAX1487E are low-power transceivers for RS-485 and RS-422 communications in harsh environments. Each driver output and receiver input is protected against ±15kV electrostatic discharge (ESD) shocks, without latchup. These parts contain one driver and one receiver. The MAX483E, MAX487E, MAX488E, and MAX489E feature reduced slewrate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, thus allowing error-free data transmission up to 250kbps. The driver slew rates of the MAX481E, MAX485E, MAX490E, MAX491E, and MAX1487E are not limited, allowing them to transmit up to 2.5Mbps.
標簽： MAX transceivers 485 low-power
上傳時間： 2013-12-22
上傳用戶：小寶愛考拉
短信發送實現gprs貓發送短信息，wap push，push load，免提短信源代碼.-gprs cat achieve this short message, WAP push, push load. Handsfree SMS source code
上傳時間： 2014-01-21
上傳用戶：cooran
FMA is a free1 powerful phone editing tool allowing users to easily manage all of the personal data stored in their phones, via a number of different connections methods. FMA allows easy management of Phonebook (both SIM and Phone memory), SMS, Profiles, and Files stored on the phone. FMA can also allow you to pickup and dial calls directly from your PC. FMA is fun and much more whatever you want it to be, it is whatever a mobile phone should have :-) (Currently based on Sony Ericsson T610 features set).
標簽： allowing powerful personal editing
上傳時間： 2014-08-12
上傳用戶：wlcaption
源碼..C#開發的手機短信發送接收程序，有興趣朋友可以研究下-C# development of the SMS to send and receive proceedings, interested friends under study
上傳時間： 2014-01-24
上傳用戶：cc1
華為CMPP2短信接口庫（JAVA版本），希望能幫到各位，-Huawei CMPP2 SMS Interface Library (Java version), hoping to be able to help you,
上傳時間： 2014-11-29
上傳用戶：獨孤求源
The idea behind differential GPS is to remove as much errors as possible from the range measurements by establishing these errors at a reference site. In its most simple setup, a GPS receiver is located at a well surveyed position and its (pseudo) range measurements are compared with the actual calculated range from this receiver to the SV s. The differences between measured ranges and calculated ranges at the reference receiver are applied as corrections to the ranges measured by other receiver(s) close by.
標簽： differential measurements possible behind
上傳時間： 2013-12-19
上傳用戶：zgu489
