I wanted to use the view code written by my colleagues as a module, but then I realized it was like this.
Create view zc_ypz
Select zcgs, dwdm, zysx, hj, 1 as kpml, sum (yzje) as aa, 0 as bb, 0 as cc, 0 as dd from zc_skpk
Where zcgs = 1 and zysx Union
Select zcgs, dwdm, zysx, hj, 2 as kpml, sum (yzje) as aa, 0 as bb, 0 as cc, 0 as dd from zc_skpk
Where zcgs = 1 and zysx Union
Select zcgs,
Tags: style blog http io ar color OS using SPScenario Description : There is a device table in the database, the field DWDM stores the factory number, the field ZNBH is the device number. DWDM and ZNBH are one-to-many relationships. The values in the database need to be loaded into listOne of the internal listlistThe data in the database is as follows:Case Study : According to test instructions, combined wi
development of related technologies and devices is critical in addition to these well-defined and developed architectures and the implementation of the Protocols. Besides the general requirements of OTN, the optoelectronic devices in Ason in the network performance detection, control, a variety of tunable devices, optical switches and switch arrays have high requirements, the advanced, reliability and economy of these new devices will directly affect the system equipment and even the entire net
Generally, we define a metropolitan optical network as a light transmission network spanning dozens of km to hundreds of kilometres, generally serving large, business-focused urban areas. Metropolitan Optical Network bridging between long-distance network and access network, the access network in the enterprise network of various services connected to the backbone of the operator network. In recent years, with the large-scale construction of long-distance transmission backbone network, with the
means of resizing the current optical fiber communication network. As a system concept, Wavelength Division Multiplexing technology usually has three kinds of Multiplexing methods, namely, Wavelength Division Multiplexing and Coarse Division Multiplexing (CWDM, Coarse Wavelength Division Multiplexing) at 1 310 nm and 1 550 nm wavelengths) and Dense Wavelength Division Multiplexing (DWDM, Dense Wavelength Division Multiplexing ).
(1) wavelength divisi
-called "frontend network" refers to the egress of the data center for enterprise campus network or enterprise wide area network. Frontend networks of different data centers (primary centers and disaster recovery centers) are interconnected through IP technology, and clients of the campus or branch access data centers through the frontend network. When a disaster occurs in the primary data center, the front-end network is quickly converged, and the client accesses the disaster recovery center to
= insert_sql DWDM ", ' D1 " ', ' " T1 " ', ' " T2 ",--------------------------------------------------------------------------^The minor error is also defined on the SQL statement, checking the pairing of quotes, single quotes, and so on.
4 Below is a browser-based online user registration process, the author in the use of some skills, dedicated to interested readers.
......Set Conn = Server.CreateObject ("ADODB. Connection ")Conn.Open "Odbclink",
Yan Xiaoying of Transmission Design Institute of Zhejiang Post and Telecommunications planning and Design Institute
There is no doubt that the revolution brought about by IP in the data communication world is decisive. It is conceivable that the first real handshake between the ITU-T and the IETF is tantamount to announcing the birth of a new generation of technology.
Based on the characteristics of metropolitan area Network data Services, there are several examples of optimizing optical netwo
power monitoring circuit monitors the changes in the optical power value of the active and standby optical fibers in real time. It has a built-in photoelectric sensor and a 1 × 2 optical splitter. The optical splitting ratio is usually 97: 3, this is equivalent to increasing the attenuation of about 0.25 dB on the transmission line, and is suitable for online applications. The optical switching circuit has a built-in 1X2 or 2x2 optical switch, which is controlled to automatically switch between
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 )
functions of IP networks, this greatly improves the QoS, routing, signaling, and other performance of the IP network communication, and achieves or approaches the statistical reuse of fixed-length group switching ATM. It is simpler, more efficient, cheaper, and more suitable than ATM. IETF is also focusing on new grouping management techniques to achieve QoS selection. The "tunneling technology" is being studied to achieve one-way link broadband transmission. In addition, how to select an IP ne
Insert_sql = insert_sql DWDM ", ' D1 " ', ' " T1 " ', ' " T2 ",
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The minor error is also defined on the SQL statement, checking the pairing of quotes, single quotes, and so on.
4 Below is a browser-based online user registration process, the author in the use of some skills, dedicated to interested readers.
......
Set Conn = Server.CreateObject ("ADODB. Connection ")
Conn.O
, line 86
Insert_sql = insert_sql DWDM ", ' D1 " ', ' " T1 " ', ' " T2 ",
--------------------------------------------------------------------------^
The minor error is also defined on the SQL statement, checking the pairing of quotes, single quotes, and so on.
4 Below is a browser-based online user registration process, the author in the use of some skills, dedicated to interested readers.......
Set Conn = Server.CreateObject ("ADODB. Connection
The explosive development of ip-based data Service brings unlimited demand for bandwidth, and dense wavelength division multiplexing (DWDM) system has incomparable networking advantages while satisfying the increasing bandwidth demand. In this paper, the key technologies are discussed.
Key technologies of full optical networking for keywords dense wavelength division multiplexing (DWDM) WDM Optical Network
network equipment is mainly for TDM traffic, can only take advantage of the entire network of a part of the bandwidth, so once the user segment a large number of high-speed data access scheme (such as ADSL), will be due to the bandwidth convergence efficiency is very low or the application of excessive capacity of the transport backbone caused great pressure. At present, some operators are establishing and maintaining independent TDM, IP, ATM, Frame Relay network, resulting in a large amount of
layer, frame-based and VLAN-based access control, and RACL on the third layer;City Ethernet:A private VLAN is a Cisco proprietary technology. It is used to isolate hosts in the same VLAN. The management is complex and the scalability is poor;PVLAN can be divided into the primary VLAN and the secondary VLAN. The secondary VLAN can be divided into the isolated VLAN and the ac vlan;PVLAN port: public port, isolation port, and AC port. The isolation port can only communicate with public ports (only
Absrtact: This paper describes the colorful situation of optical network world, expounds the core technology of each series of optical Network, discusses the adaptation of optical network products to IP service, and puts forward the fusion node and intelligent Optical Network technology.
Key words: Synchronous Digital Series SDH, digital cross connection equipment based on SDH s-dxc, dense wavelength division multiplexing DWDM, Optical Division multi
Dense wavelength division multiplexing (DWDM) technology provides a huge transmission capacity for communication networks, and gradually becomes the mainstream transmission technology. With the maturation of DWDM technology and the rapid growth of transmission capacity, the pressure of traditional electronic switching system is increasing, and the introduction of optical switching technology is urgent.
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