At present, the wireless network solution because of its flexible network, low-cost and other characteristics of small and medium-sized enterprises have been favored users. And will bring huge changes to the small and medium-sized wireless office. Specifically, the successful implementation of WLAN to improve the office efficiency of employees, the company in the scale of expansion, save the time and cost of network expansion, and protect the company's network construction of long-term investmen
switch between the connection recommended multimode or Single-mode fiber, horizontal wiring can be used in the Super five type of unshielded twisted pair. As mentioned earlier, this structure is easy to expand and upgrade. Switch products are Cisco 6509/6509 OSR, Foundry bigiron 8000/4000, Extreme black Diamond 6816/6808, Alcatel powerrail 5200/2200, Lucent Cajun P880, Riverstone rs32000/rs8600, Huawei MD5500, Dragon rs6006g/rs6004g, creative AR8000
WiMAX's full name is microwave access to global interoperability (worldwide interoperability for microwave access), combining this technology with the need for authorized or unauthorized microwave equipment, the lower cost, will expand the broadband wireless market, Improve the awareness of business and service providers. WiMAX is the IEEE802.16 standard, or wide band wireless access (broadband Wireless ACCESS,BWA standard). It is a wireless metropolitan area network (WMAN) technology, which is
conducted extensive and in-depth research on OADM devices.
From the commercial level, Lucent Company has developed 40X10GB/S with perfect network interface Oadm node, and successfully to the market. Other companies, such as Alcatel,siemens,nec, also have mature products to launch. At present, the domestic research on OAMD has made great progress, in the 863-300 project "China High-speed Information demonstration network", Datang, Wu-mail, ZTE comple
issued a standard for wavelength allocation: ITU-T g.983.3, a broadband optical access system that uses wavelength assignment to increase business capabilities.
The basic features of the current Apon standard g.983 are:
* Based on ATM signaling
* Symmetric (bidirectional 155.52mb/s) and asymmetric working mode (downlink 622.08mb/s, uplink 155.52mb/s)
* Up to 32 users can support the optical branch, the maximum transmission distance of 20km
* Single fiber or double fiber operation
* Increa
, mounts the root device, and then loads the necessary kernel modules. After you complete these operations, start the first User space program ( init ) and perform advanced system initialization work.This is the whole process of Linux booting. Now let's dig into the process and delve into some of the details of the Linux boot process.System bootThe system boot phase relies on booting the hardware on the Linux system. In an embedded platform, a boot environment is used when the system is power-up
On PyCon, some kids shoes share similar concepts, but it is not suitable for general Internet projects. It feels a little too different. However, I implemented this solution before seeing PyCon's sharing. The same requirement is different. Here, I only implement a data access component, not a Server.
First, the method in this article is from how to use the MySQL database shared by FriendFeed. In short, the Python object is directly dumps and then zip compressed and stored in a MySQL field. Isn't
Twitter is the most popular Internet service in the world. It provides users with micro-blog services, and the interface is concise and beautiful. In this article, we will use jqueyr to create a twitter-like site. You will learn some jquery skills and how to use PHP and mysql together. You will like it. JQueryTwitter
Twitter is the most popular Internet service in the world. It provides users with micro-blog services, and the interface is concise and beautiful. In this article, we will use jqu
technical system of the first strategy. In order to achieve the telecom operation goal of end-to-end IP phones to a greater extent, the technical mechanism of Softswitch is designed for telecom operators. The IP telephone voice service is the most important and fundamental service function in soft switches 。
Softswitch Technology
The concept of Soft switch was proposed by the Bell Laboratory of Lucent in 1997, the original intention is to integrate t
replace the traditional TDM return network. A key technical requirement is high-quality transmission of reference clock signals, to ensure the stability of clock signals.
The ON technology can meet the technical requirements of traditional base stations. First, the GPON platform can transmit the reference clock in the physical layer in NTR mode, and secondly, GPON can meet the latency and jitter requirements for transmitting real-time traffic, this is mainly due to the flexible deployment of Qo
wireless network status in detail and set various functional parameters. Taking Lucent ORiNOCO as an example, using its own ORiNOCO Client Manager management software, you can implement functions such as signal viewing, channel selection, and wireless encryption, which are also very convenient to set.
Some brand computers often have more powerful management software, such as the IBM ThinkPad laptop, using the IBM Access Connection software and wirele
layout update, the control module updates the layout database data maintained by the interface module, and the routing determines the device to perform complex path computing for the given call request. Layout updates are usually carried out cyclically or only when major changes occur. These updates do not bring about a lot of work. In addition, the layout aggregation technology can also expand the routing protocol to a larger network. In this system structure, the control module no longer proc
In addition to FCIP, another method is iSCSI, which converts user requests into SCSI code and encapsulates data into the IP package for transmission over Ethernet. To connect a geographically dispersed SAN, the FCIP Protocol can only be used for Fiber Channel Technology connections. In contrast, iSCSI can run on an existing Ethernet. SAN connections, such as FCIP and iSCSI protocols, can provide higher performance, validity, and fault tolerance based on point-to-point connections of traditional
encourages IT vendors to make efforts to better manage IP addresses.VoIP converts a phone number into an IP device, potentially doubling the number of IP addresses.The focus of Network Security began to shift from unknown devices to network access and potential virus infections, which also forced companies to better manage network access.IT provides end users with QoS and application requirements, prompting IT managers to pay more attention to IP addresses.Some large enterprises have many compl
, their solutions are also different. At present, ZTE's 3G core network based on the V3 platform can already bring the PHS wireless network. That is to say, ZTE V3 core network already has the above features.
Because the' interface between the PHS wireless network and the PHS core network is not public, the 3G core network of ZTE cannot bring the UT and Lucent PHS wireless networks. Therefore, for the PHS networks of other manufacturers, we proposed a
Nokia Siemens Network (NSN), a mobile telecom device manufacturer, announced on Monday that it plans to sell its optical network business to Marlin Equity Partners, according to a message on August 1, December 4, Beijing time.
Nosi did not disclose the financial details of the asset transaction, but it expects the transaction to be completed in the first quarter of next year.
According to the statement, about 1900 employees will be transferred to the new company due to the transaction, most of
mobile phones, PDAs, and other mobile devices, and can well implement online instant communication, voice and video data transmission and other multimedia applications.In the current market, H.323 is widely operated due to its long development time, but its implementation is complicated and its compatibility is poor. Most MGCP protocols are supported by carriers in the softswitch platform. However, MGCP only supports voice transmission and does not support the transmission of images and other m
above tests, we recommend that you consider the test items listed below during the test. 1) Functional testing: It mainly verifies whether the product has every function designed. 2) stability and reliability test: Generally, the method of increasing the load is adopted to evaluate and analyze the running capability of the equipment under long and high load conditions. 3) interoperability test: different network products must be able to communicate with each other. Test the interoperability rou
telecom operation goal of end-to-end IP phones to a greater extent, people have designed Softswitch technology mechanisms for telecom operators. The IP telephone voice service is the most important and fundamental service function in the soft switch.
Softswitch Technology
The concept of Soft switch (Softswitch technology) was proposed by Bell Laboratory of Lucent in 1997. The original intention was to integrate the existing traditional PSTN circuit s
agents are concentrated throughout the province. In order to enable customers to enjoy the service of provincial center agents by calling the local 95533 China Construction Bank uniform Special Service Code), VoIP technology is adopted between municipal banks and provincial banks.
Solution Design
The provincial branches need to process a large number of voice and fax services, so the Cisco AS 5300 universal access server with a large capacity is used. Each local branch uses a Cisco 3640 router.
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