rj11 to rs232

completely different. There is an ISDN signal in the line. When the telephone and data are together, the ISDN must change the number, which is also a small advantage of ADSL.Can I use a dial-up Modem as an ADSL Modem?A: No. The ADSL Modem is different from the current dial-up Modem. The modulation method and network structure are different, and the interface to the PC is 10BaseT Ethernet interface instead of RS232 serial port or parallel port. Likewi

ADSL, so it is generally necessary to install the extension after the separator line.17. I want to install ADSL, but I am worried that the telephone quality will decrease. In addition, does a call result in a decrease in the Internet access rate?ADSL uses the frequency division multiplexing technology to separate voice and data. voice and data run on different channels, so they do not interfere with each other. Even if you use a phone call to access the Internet, the speed of the Internet acces

connected to the serial or parallel port of the computer through a cable. In this way, you can call the internet. TA can automatically select an idle B channel for communication. For example, when you only use channel B to access the Internet, if an external phone calls in, the phone will ring and you can normally answer the phone. If you need to make an external phone call at this time, as long as you mention the phone, TA will automatically select the free B channel for the call. Of course, i

We have heard of point-to-point protocols, that is, PPP protocols, during our learning of network protocols. What are the characteristics of this protocol? Here we will take a look at the PPP protocol and the PPP status. PPP is a data link layer protocol that complies with the HDLC Advanced Data Link Control Protocol. PPP is designed to transmit network layer packets in the OSI model over point-to-point physical links (for example, RS232 serial port l

. ③ Data processing. data processing functions of smart sensors are generally not uniform. generally, digital filtering is required. some smart sensors also need to process other signals, such as signal amplitude discrimination, signal feature extraction, and display processing. in short, data processing requirements vary in different application fields. ④ Data transmission. in the control system, intelligent sensors collect and organize data, and need to transmit the data to the system core con

Use the serial port to maintain the Linux host-Linux Enterprise Application-Linux server application information. The following is a detailed description. A Linux host can be maintained through a serial port like a vro or vswitch through simple settings. The settings are recorded as follows: 1. Add the following in the/etc/inittab: Co: 2345: respawn:/sbin/agetty ttyS0 9600 vt100 init q 2. Add the following in/etc/securetty: TtyS0 3. Add the following in/etc/grub. conf: Console = ttyS

Integrated Wiring System should be open. On the one hand, the Integrated Wiring System can adapt to different functional requirements, while supporting the corresponding equipment of different manufacturers.3) practicality. The Integrated Wiring System can adapt to the development of technology in the present and future to achieve data and voice communication.4) flexibility. The Integrated Wiring System should be able to meet flexible and general requirements.5) modular. In the Integrated Wirin

software interface or functions to meet the display requirements of different users. (3) Diversity of input and output data during integration projects. First, we need to integrate the equipment from other manufacturers and easily access the platform software. Second, there are many other problems related to data output when other manufacturers want to integrate their own devices. There are no uniform standards, and they are also very different. (4) Diversity of communication links. communicati

With the development of China's routing industry, it also promotes the upgrade and upgrade of the router technology. Here we mainly introduce the router interfaces that are frequently used in the router technology, and the types of interfaces supported by the router, represents the versatility of routers. Common interfaces include: common serial interfaces are converted to RS232 DTE/DCE interfaces, V.35 DTE/DCE interfaces, X.21 DTE/DCE interfaces, RS4

I have learned a little about vro configuration, so I have studied the performance indicators of vro configuration. I would like to share them with you here, hoping to help you. This table mainly compares whether the vro is a modular structure. Vro configurations in a modular structure are generally highly scalable and support multiple port types, such as Ethernet interfaces, Fast Ethernet interfaces, and high-speed serial ports, the number of ports of various types is usually high. The fixed vr

Line Protection basically requires that the devices connected to the internet have a ground line, including hosts, workstations, hubs, switches, routers, and MODEM connected To routers. A terminal or PC configured with a Cisco router must also use a valid power supply. Cisco synchronous serial interfaces are commonly used. Different interfaces can be obtained through different cables. Such as RS232 and V.35. In addition, the cables of Cisco synchrono

specify a dedicated monitoring port as the mirror port, but now most new vswitches can specify any port as the mirror port. Although the image implementation methods of switch manufacturers vary, there are some similar monitoring options. It is worth noting that, in almost all cases, the switch fault diagnosis technology filters out errors when forwarding traffic to the mirror port. For vswitch fault diagnosis technology, this means that useful information is filtered out at the same time. In a

through the RS232 port of the control port switch or the Telnet process. This means that in addition to monitoring tools, we usually need to bring a computer or terminal to configure the switch. The mirror port is often only a "listener" port, but many switch manufacturers allow this port to be configured in full duplex mode. With the image port configured, the monitoring tool can view the backup of the actual traffic between the host and the server

FileOutputStream (fileToWriteTo ); BMP encodeparam param = new BMP encodeparam (); ImageEncoder enc = ImageCodec. createImageEncoder ("BMP", OS, param ); Enc. encode (img ); OS. close (); For the programming guide for storing image files, see the following webpage: Http://java.sun.com/products/jav... velopers/jai-guide/ Q: How can I read and write data to the serial port in Java? A: ?? Sun's Java Communication API2.0 can be used for reading and writing serial ports. It supports

In FedoraCore6 or Core5, use minicom to control the serial port configuration of the target board-Linux general technology-Linux technology and application information. The following is a detailed description. : 0wl; l1 Recently, because of the U-BOOT Kernel File upgrade in the processing of embedded systems, but need to set up a Fedora Core5 or 6 system, access the target board serial port through minicom, so as to achieve the purpose of controlling the target board, however, in the actual c

sold for industrial and embedded markets. Microprocess is global in real-time software and has professional knowledge of system integration. Its products, such as the 740 PowerPC compactPCI board, can be ordered together with the standard Linux distribution or embedded Linux version. 　　 Moreton Bay: Moreton Bay released a Linux-based Internet Router, which ranges from NETtel 2520 to NETtel 2500. These small, easy-to-connect smart router solutions are designed to provide a simple, secure, and af

Bought a root USB to RS232 serial line, Pl2303 chip. The sellers and the official all said does not support WIN8, but I do not believe in Win7 can use in the win8/8.1 will not be used up.The official latest version of the v1.9.0 driver description said that does not support the win 8/8.1, after the attempt does not support. Hardware can be identified but cannot be started (error code 10, yellow exclamation mark).The latest version of No, then look for

unreliable data stream transmission services. It does not provide access authorization and authentication mechanisms, and uses the timeout retransmission method to ensure data arrival. It can be seen from its name that it is suitable for transferring "simple" files. What is different from FTP is that it uses the UDP 69 interface, so it can traverse many firewalls. However, it also has disadvantages, such as unreliable transmission and no password verification. Even so, it is very suitable for t

advantage of the I²C bus is its simplicity and effectiveness.Because the interface is directly above the component, the I²c bus occupies very little space, reduces the board space and the number of chip pins, and reduces the interconnection cost. The bus can be up to 25 feet in length and can support 40 components at the maximum transfer rate of 10Kbps. Another advantage of the I²C bus is that it supports multi-master (multimastering), where any device capable of sending and receiving can becom

http://blog.csdn.net/sdwuyulunbi/article/details/6632382Believe that a lot of people on the microcontroller and computer or chip communication, RXD and txd How to connect more confused. Because in some circuit diagram, there are some direct connection method, there are some cross-linking method, let a person a bit puzzled.The first thing to understand is the two concepts, DTE and DCE. DTE refers to data terminal equipment, the typical DTE is a computer and a microcontroller. DCE refers to the da