multicast distribution service, is a broadband point-to-point access system that can access voice, data and video services. LMDS system using millimeter wave transmission, working in the 20-40ghz band, can provide up to 155.52Mbps user access rate, known as a "Wireless optical fiber" access system. In addition, the LMDS system supports all major voice and data transmission standards, such as ATM, TCP/IP, and MPEG-2.The *LMDS system adopts a kind of honeycomb structure configuration, by which on
, but rather a straight line, that is, the line sequence at both ends of the jumper is identical, but it does not mean that as long as the line sequence is the same, for the 100Mbps network uses 100Mbps Exchange method, Refer to the previous chapter of this tutorial for details. One more note is that the cascade between the hub devices is usually done through a cascading port, and that the interconnection between routers and hubs is done through a normal port. In addition, the router and hub dev
Topic Links:ah haha, dot me dot MeTest Instructions:A region of the Arctic has n villages (1≤n≤500), each of which is represented by a pair of integers (x, y), of which 0≤x, y≤10000. In order to strengthen linkages, it was decided to establish communication networks between villages. The communication tool can be a radio transceiver, or it can be a satellite device. All villages can have a radio transceiver
transceiver lamp "Normal", the user is God, I believe you once, but still not pass ah, suspicion is the user firewall or internal network problems, let users restart equipment, and then contact the user.
The phone rang again, looking for someone, OK! Give a turn, just hang up the phone, telecommunications pass to the phone, ask us to do not network export access, I said do not need, this brother really dedicated, have to grind with me, I am anxious!!
Vro interfaces are very important for network connection and routing functions. Here we will give a comprehensive explanation of vro interfaces and connection knowledge. A vro has powerful network connection and routing functions. It can be physically connected to a variety of different networks, which makes the router interface technology very complex, the more high-end router interfaces there are, the more network types it can connect. Vro ports include LAN ports, WAN ports, and configuration
channels are supported. The new-generation ADSL access technology supports up to four bearer channels and four delay channels, while the first-generation ADSL supports up to three bearer channels and two delay channels ).
You can configure the frame structure latency and bit error rate (BER. The first generation of ADSL access technology has a fixed error code of 10. Because the BER is fixed, the line must maintain this BER indicator from start to end. Once the BER is greater than 10, the speed
Describes optical fiber access devices such as optical fiber jumpers.) in the Internet era, you may encounter Installation Problems of optical fiber access devices. The following describes the knowledge of optical fiber access devices, including how to connect DI-524M Wireless Broadband Router to your network and so on.
Optical jumper
Optical jumper
A jumper is a cable pair or unit without a connector. It is used to connect various links on the distribution frame. Optical fiber Jumpers are used
channels and bearer channels. the new-generation ADSL technology supports up to four bearer channels and four delay channels, while the first-generation ADSL supports up to three bearer channels and two delay channels ).
You can configure the frame structure latency and bit error rate (BER. the first generation of ADSL technology has fixed 10 error codes. because the BER is fixed, the line must maintain this BER indicator from start to end. Once the BER is greater than 10, the speed must be red
200 min to ask if there is a grab kit to capture the crossdomain.xml request from Flash?
Use Chrome or FF development tool can capture this request, but fiddler not, ask you heroes, thank you!
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It's better to give something out, or else you guys won't be able to test it.
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FIDDLER is a shrimp thing? If it's a bag-grab tool, it should be tougher than firebug.
I'll take a look at the test address.
------Solution-----------------
proprietary wireless protocol developed wireless products. 2.4GHz type of wireless key mouse, generally plug in the computer's USB interface adapter, mouse and keyboard powered by the battery.2. Basic principles of wireless key mouseThe main difference between the wireless mouse and the Wired mouse is the way the signal is transmitted. Wired mouse uses wires to transmit information, while wireless keyboards use radio to transmit information. The early wireless keyboards used 27MHz bands, and th
meet the requirements of data transmission in Multi-Point media, the transmitter signal is not too weak, and the signal transmission requirements are not met in signal attenuation; or
Excessive signals lead to Circuit overload and generate harmonic and other false signals. Therefore, for systems with N sites, to meet the preceding requirements, consider
N * (n-1)/Two arrays.
(4) Two transmission technologies: baseband transmission (full-frequency transmission of two-way digital signal transmiss
. Powerpctm structure processor consists of three modules: powerpctm kernel, System Interface Unit (SIU), and communication processor module (CPM ). All three modules adopt a 32-bit internal bus. The master processor of the MPC860 is a 32-bit powerpctm kernel that enables memory management (MMU) and command and data caching. In the system interface unit of the MPC860, the memory control unit supports a variety of high-performance memory, including SDRAM and flash, as well as a PCMCIA controller
Measure the node spacing of wireless sensors using audio signals
[Date:]
Source: China Power Grid Author: Meng lingjun, Xia shanhong
[Font:Large Medium Small]
1 Introduction
A wireless sensor network node system that uses audio signals to achieve autonomous measurement of node spacing. The system includes dsPIC6014A microcontroller, 512 kb sram, 2.4G band RF transceiver module, audio transce
I. router interface
A vro has powerful network connection and routing functions. It can be physically connected to a variety of different networks, which makes the router interface technology very complex, the more upscale a router has more interface types, because the more network types it can connect. Vro ports include LAN ports, WAN ports, and configuration ports.1. LAN interface
Common Ethernet interfaces include AUI, BNC and RJ-45 interfaces, as well as FDDI, ATM, Gigabit Ethernet and so on
0. Relevant informationRelated materials include other highlights and code warehouse "embedded TCP IP data Rollup" "ENC28J60 Learning Notes-Index" "Part 1th" "Part 2nd" "Part 3rd" "Part 4" "Stm32net Learning Notes-index" UI P Learning Notes "LWIP learning notes--stm32 enc28j60 transplant and Getting Started"
1 Preface
Embedded Ethernet development can be divided into two parts, one is the use of Ethernet transceiver chip, one is the implementatio
fiber, mobile satellite systems and 3G.A practical broadband wireless access technologyDigital microwaveMicrowave technology is the first technology used in wireless access network. The first generation of wireless access technology in the the 1970s is microwave technology. Today, the microwave technology to digital, high frequency, broadband direction, very suitable for broadband access, a bit of the structure, but also a bit of the multiple point structure. Point-to-Point bandwidth is the hig
Often meet someone in the QQ group to ask about the product of Huawei's specific model number of the meaning of today's summary of the content to be posted for your reference.
LI (Lite software Image) indicates that the device is a weak feature version.
SI (Standard software Image) indicates that the device is a standard version and contains the underlying features.
EI (Enhanced software Image) indicates that the device is an enhanced version and contains some advanced features.
HI (Hyper softwa
, the back plate bandwidth and swallow rate are considered synthetically.
3. Port Rate
In addition to backplane bandwidth, throughput, and so on, the port rate is a measure of the switch is an important indicator. Now the port speed is: 10M, 10/100m, 1000M, 10/100/1000m. The corresponding interface physical characteristics are also different.
When choosing a switch specifically, pay special attention to the higher port generation value of the high speed port. In the absence of immediate expli
choosing the switch, the back plate bandwidth and swallow rate are considered synthetically.
3. Port Rate
In addition to backplane bandwidth, throughput, and so on, the port rate is a measure of the switch is an important indicator. Now the port speed is: 10M, 10/100m, 1000M, 10/100/1000m. The corresponding interface physical characteristics are also different.
When choosing a switch specifically, pay special attention to the higher port generation value of the high speed port. In the absenc
packet from the ge-2/3/0 port; the RT2 ge-1/1/11 port transceiver counter unchanged, indicating that the RT4 ping package does not reach RT2.
RT4:
Interface ge-2/3/0
Input packets: 25
Output packets: 8246
RT2:
Disp int gi 1/1/11
Input: 0 bytes, 0 packets
Output: 1536 bytes, 24 packets
Case 2: Only one Pigtails are required to be connected, that is, RT4 sends the pigtails in the RT2 receiving direction; RT2 ge-1/1/11 port up, RT4 ge-2/3/0 port down,
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