# Include # define uchar unsigned char uchar rtemp, sflag; void serialinit (void) {txsta = 0x24; // enable the transmitting enable and high baud rate, the initial value of trmt can be 0 to 1 rcsta = 0x90; // enable serial port, continuous receiving,
This article describes how to use the socket interface to manage the Buffer Queue in a Linux user space and send and receive two threads. The Code includes the following points:
1) Use two threads to manage the sending and receiving queues, and
Kernel version: 2.6.34
UDP packet ReceptionThe reception of UDP message can be divided into two parts: the protocol stack receives the UDP message, inserts the corresponding queue; the user calls Recvfrom () or recv () system call to take out the
To add a using instruction set:
Using System.Net.Sockets;
Using System.Threading;
Using System.Net;
Add definition (IP address IP interface Berkeley socket Interface):
Private IPAddress ServerIP = Ipaddress.parse ("127.0.00.1");
Private
Recently, someone often mentions how Exchange's multiple domain names are implemented, simply collating a document and communicating with everyone.
By default, the default policy for Exchange Server 2010 is to send and receive mail using the same
Abstract: This paper discusses how to use the serial port with FIFO to reduce the number of received interrupts, and gives the frame packing method through a custom communication protocol format, and then introduces a special serial port data
different wavelengths simultaneously in the same optical fiber.
3. CWDM (coarse Wavelength Division Multiplexing) and DWDM (Dense Wavelength Division Multiplexing)
The design of the communication system varies with the interval width of each wavelength. Based on the channel interval, WDM can be subdivided into CWDM (coarse Wavelength Division Multiplexing) and DWDM (Dense Wavelength Division Multiplexing )
multimode.The difference between Singlemode and multimodeGeneral manufacturers will be in the color of the pull ring to distinguish, for example: Black pull ring for multimode, Wavelength is 850nm, blue is the wavelength of 1310nm module, yellow is the wavelength 1550nm module, purple is the wavelength 1490nm module.Optical Module ClassificationXFP Optical ModuleSelectable wavelength: 850NM,1310NM,1270NM,1330NM,CWDM,DWDMRate: 10GXFP (Gigabit Small Fo
application wavelength is 1 550 nm. Of course, 1 310 nm wavelength division multiplexing is also being developed. The spacing between adjacent channels of coarse Wavelength Division Multiplexing (large wavelength interval) is generally greater than or equal to 20 nm, and the number of wavelengths is generally 4 or 8 waves, up to 16 waves. When the number of multiplexing channels is 16 or less, the CWDM system has more advantages than the DWDM System
transmission rate, including 8 gbabit Fiber Channel and 10GbE. Introduced the SFP + module version of optical fiber and copper core,
Compared with the Xenpak, X2, or XFP version of the module, the SFP + module retains some circuits on the main board, rather than in the module.
SFP type
SFP transceiver has a variety of different sending and receiving types. You can select an appropriate transceiver
development of IP data services, how to adapt to the requirements of comprehensive business access and convergence, how to adapt to the requirements of providing differentiated services to customers, and how to ensure a higher network availability at a lower cost scalability. However, the traditional PDH, optical fiber transceiver, and Co-rotating access devices and networking solutions have the following problems: single technology, insufficient net
Today's communication networks are composed of multiple interconnected optical and electrical components to support high-speed video, voice, and data transmission. The backbone of the network is optical fiber. Its design and manufacture are used to optimize attenuation and dispersion, making the network the most cost-effective and cost-effective network. A new optical fiber design is widely accepted in the global communication industry, that is, low water peak LWP) optical fiber. The low water p
There are many areas worth learning about the access network technology. Here we mainly introduce the future direction of the construction and development of the Internet. The completion of the restructuring of domestic telecom operators indicates that major operators are beginning to enter the full-service operation era, and also means that the competition between them will become more intense. The rapid changes in customer business and bandwidth requirements pose new challenges to the operator
, according to John d' Ambrosia, chairman of the Ethernet Alliance, many data centers have used servers of more than 10 Gb. This is why multiple chip manufacturers have provided 25 Gbit/s serial/destring transceiver. This not only facilitates the convergence of 25G, 50G, and G Ethernet bandwidth, but also reduces costs due to batch processing.
50 GB
Although there is still some time before the implementation of the 50G Ethernet IEEE Standard (around 2
ObjectiveIn the past few weeks, I have investigated and researched the security of GSM in many aspects, such as the loopholes in GSM communication protocol. In addition, I have a security audit of the most widely used BTS software in the world today. In this article, I'll show you a few of the vulnerabilities I've found in this open source product that will allow an attacker to invade the base station transceiver (BTS) and remotely control its
the recovery function of SDH network.
Mippo Ethernet: Enables Ethernet networks to be transmitted through multiple wavelengths or multiple light waves or a single optical fiber, thereby greatly increasing network capacity.
CWDM: Compared with DWDM, CWDM is more suitable for building a metropolitan network, it transmits a small number of wavelengths in one fiber, while
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