dte dce

Physical LayerDefinition of ITU in recommendation X.25:Physical, electrical, functional, and procedural features are used to establish, maintain, and remove physical channels between DTE and DCE.Here, DTE (data terminal equipment) refers to the data terminal device, which belongs to the userConnected device or WorkstationThey are the source or sink of communication. Such as computers and terminals;

mentioned with CSU, called CSU/DSU. the physical interfaces of communication devices can be divided into DCE and DTE: DCE (Data Circuit-terminating Equipment Data Circuit Termination Device): the DCE device provides interfaces for the client to receive network communication services, it also provides clock signals use

functions, and each layer directly provides services for its upper layer, and all layers support each other. Layer 4 to Layer 7 are mainly responsible for interoperability, while Layer 1 to Layer 3 is used to create physical connections between two network devices.1. Physical LayerThe physical layer is the first layer of OSI. Although it is at the bottom layer, it is the basis of the entire open system. The physical layer provides transmission media and interconnection devices for data communic

Address: http://www.myarticlemall.com/Article/Cisco-CCNA-Exam-Tutorial---Troubleshooting-Directly-Connected-Serial-Interfaces/2611 Controllers are the part of the interface that makes the physical connection. Most important to us is what kind of cable is attathed to a serial interface. A dte (Data terminating equipment) cable is the normal cable you shoshould use.Being DTE means you have CT the other end

) and the DTE device of the user data terminal ). DCEDataCircuit-Terminal Equipment, it is actually a group switch on the WAN link. This device is usually controlled by a telecom operator. DTEDataTermainal Equipment) A data terminal device, usually an internal device of an enterprise, such as a router, which is used for access to a frame relay switch. In short, a DTE device is a user's front-end device that

RS-232C specification standard interface has 25 lines (4 lines, 11 control lines, 3 timing lines, 7 spare and undefined lines), commonly used only 9:RTS/CTS request sending/clearing sending Flow ControlRxd/txd data transmission and receivingDSR/DTR data terminal ready/data set ready Flow ControlDCD Data Carrier DetectionRinging-ri ring indicatorSG signal locationThe specific definition is as follows:RTS is used to indicate that DTE requests

encapsulate the PPP protocol and adopt CHAP for authentication. In Router1, a user should be created and the peer vro host name should be used as the user name, that is, the user name should be router2. At the same time, a user should be created in Router2, with the peer router host name as the user name, that is, the user name should be router1. The password of the user must be the same. The settings are as follows: Router1: Hostname router1 Username router2 password xxx Interface Serial0 Ip a

ISO/IEC 7498, which defines the 7-tier framework for network interconnection, the Open Systems Interconnect Reference Model (OSI model ).A switch is like a neighboring street, and a router is the intersection of a street. (The second layer of the switch , the data link layer, also has four layer, seven layer switch; the router works on the third layer).See (http://www.he.edu.cn/learn/wlxy/netlan/index.html)Crossover and direct-attached network cablesFirst, direct connection interconnectionBoth e

is a public header, and a hole-shaped joint is a mother. The appearance of the 9-pin serial port is shown in 2. Figure 2 DB-9 exterior Diagram From figure 2, we can see that in the 9-pin serial port connector, the pin definitions of the public and mother heads are different, which requires special attention. So what are the functions of these pins? The functions of the 9-pin serial port and the 25-pin serial port are described in 3. Figure 3 9 common pin functions of needle serial po

. transparent to applications. the presentation layer provides the data format conversion service. data encryption. services such as data representation standards. the presentation layer determines Organization method. Common presentation layer protocols include: Data Structure standard, ASCII, image standard JPEG, GIF, Midi, MPEG, QuickTime, etc. The application layer is the layer closest to the user of the OSI reference model. It provides network services for applications. The application laye

resources can support GPRS without too much ModificationModem. For example, you only need to establish a dial-up connection in the win series.Remember, the GPRS Modem itself does not need to obtain the IP address from the server through PPP. It is the PDP thing, but it assigns this IP address to the DTE through PPP.For xiaosheng80:1. Is there an internal IP address first, which is sending an IP packet (? PPP package) process?It is basically correct,

Frame Relay switch configuration Target: Frame Relay switch configuration Lab preparation: Configuration knowledge and Frame Relay knowledge. Lab device: Router with serial port) 4 V.35 cable DTE/DCE) 3 Tutorial principle: The frame relay standard can be configured and managed permanent virtual circuit PVC in the frame relay network) for addressing, and the frame relay permanent virtual circuit is identi

Usually the RS-232 interface appears in 9-pin (DB-9) or 25-pin (DB-25) Type Generally, there are two groups of RS-232 interfaces on the PC, called COM1 and com2 RS-232C interface signal RS-232C Gauge Standard Interface has 25 lines, 4 lines, 11 control lines, 3 timing lines, 7 standby and undefined lines, commonly used only 9, they are 1. The data set ready-DSR status indicates that the modem is in usable state. 2. Data Terminal ready-DTR indicates that the data terminal can use 3 request to sen

layer and application layer;The physical layer specifies the mechanical, electrical, functional, and process characteristics between activating, maintaining, and closing communication breakpoints,The physical layer of media includes overhead wire, balanced cable, Optical fiber, wireless channel and so On. Interconnection devices for communications refer to the interconnection devices between the DTE (data Terminal Equipment) and the

devices between DTE and DCE. DTE is the data terminal equipment, also known as physical devices, such as computers, terminals, etc. are included. The DCE is a data communication device or circuit connection device, such as a modem. The data transfer is usually through DTE--

all networks. Plan the topology: 650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131227/0442356106-1.jpg "title =" topology .jpg "alt =" 111088103.jpg"/> Describes the configuration process: Set the frame relay node/the first node is also the FR1 route setting device; FR1] You can set a name named fr1. The route settings are called frame relay node first: Farm-relay switching The purpose is to change the routing device to a vswitch) Then, set the port; Int s0/0 This port pr

How to interconnect single-chip serial communication rxd with txd Category:8051 2012-04-0711: 35 Read by 348 Comment (0) Favorites Report Reprinted from: http://blog.csdn.net/sdwuyulunbi/article/details/6632382 I believe many people are confused about how to connect rxd and txd when the microcontroller communicates with a computer or chip. In some circuit diagrams, some are the direct connection method and some are the cross connection method, which makes people

Most users may not understand the router parameter settings, so I have studied the basic introduction and some configuration methods of the router parameter settings. I will share them with you here, I hope it will be useful to you. The types of interfaces supported by vro reflect the versatility of vro parameter settings. Common interfaces include: common serial interfaces are converted to RS232 DTE/DCE in

Editor's note: This article will give readers a detailed introduction of all aspects of the router, including router type, router configuration, routing protocol support, multicast support, router performance specific performance indicators. Router type This table key compares whether the router is a modular structure. Modular structure of the router generally better scalability, can support a variety of port types, such as Ethernet interface, Fast Ethernet interface, high-speed serial port, a

call metering value for at + camm.11. At + cpuc unit price and currency table.12. append services related to at + chld calls.13. At + CLCC lists the current calls.14. At + cssn append service notification.15. At + cusd unorganized append service data.16. At + ccug disabled user group. 8. Data commands1. Select the at + cbst type.2. At + fclass selection mode. This command sets the module to a special mode for data or fax operations.3. At + Cr Service Report control. This command allows more d