TC35i新版西门子工业GSM模块是一个支持中文短信息的工业级GSM模块,工作在EGSM900和GSM1800双频段,电源范围为直流3.3～4.8V ,电流消耗——休眠状态为3.5mA，空闲状态为25mA，发射状态为300mA(平均)，2.5A峰值；可传输语音和数据信号, 功耗在EGSM900(4类)和GSM1800(1类)分别为2W和1W ,通过接口连接器和天线连接器分别连接SIM卡读卡器和天线。SIM电压为3V/1.8V，TC35i的数据接口(CMOS电平)通过AT命令可双向传输指令和数据,可选波特率为300b/s～115kb/s , 自动波特率为1.2kb/s～115kb/s。它支持Text和PDU格式的SMS(Short Message Service,短消息),可通过AT命令或关断信号实现重启和故障恢复
上传时间： 2016-08-26
上传用户：fnhhs
SIP（Session Initiation Protocol）是由IETF定义，基于IP的一个应用层控制协议。由于SIP是基于纯文本的信令协议，可以管理不同接入网络上的会晤等。会晤可以是终端设备之间任何类型的通信，如视频会晤、既时信息处理或协作会晤。该协议不会定义或限制可使用的业务，传输、服务质量、计费、安全性等问题都由基本核心网络和其它协议处理。SIP得到了微软、AOL、等厂商及IETF和3GPP等标准制定机构的大力支持。支持SIP的网络将提供一个网桥，以扩展向互联网和无线网络的各种设备提供融合业务能力。这将允许运营商为其移动用户提供大量的信息处理业务，通过SMS互通能力与固定用户和2G无线用户交互。SIP也是在UMTS3GPP R5/R6版本中使用的信令协议，因此可以保护运营商目前的投资而及具技术优势和商业价值。 SIP的技术优势 *独立于接入：SIP可用于建立与任何类型的接入网络的会晤，同时还使运营商能够使用其它协议。 *会晤和业务独立：SIP不限制或定义可以建立的会晤类型，使多种媒体类型的多个会晤可以在终端设备之间进行交换。 *协议融合：SIP可以在无线分组交换域中提供所有业务的融合协议。
标签： Initiation Protocol Session IETF
上传时间： 2016-08-26
上传用户：我干你啊
sim300的at指令集，用于控制sim300完成GPRS数据传输，SMS接收发送，语音通话等功能
上传时间： 2016-08-27
上传用户：TF2015
很好用的，短信发送平台，A simple UNIX client Allowing you to send SMS messages to mobile phones and pagers
标签：
上传时间： 2016-09-23
上传用户：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.
标签： MAX transceivers 485 low-power
上传时间： 2013-12-22
上传用户：小宝爱考拉
短信发送实现gprs猫发送短信息，wap push，push load，免提短信源代码.-gprs cat achieve this short message, WAP push, push load. Handsfree SMS source code
上传时间： 2014-01-21
上传用户：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).
标签： allowing powerful personal editing
上传时间： 2014-08-12
上传用户：wlcaption
源码..C#开发的手机短信发送接收程序，有兴趣朋友可以研究下-C# development of the SMS to send and receive proceedings, interested friends under study
上传时间： 2014-01-24
上传用户：cc1
华为CMPP2短信接口库（JAVA版本），希望能帮到各位，-Huawei CMPP2 SMS Interface Library (Java version), hoping to be able to help you,
上传时间： 2014-11-29
上传用户：独孤求源
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.
标签： differential measurements possible behind
上传时间： 2013-12-19
上传用户：zgu489
