Microwave transmission is one of the most flexible and adaptable communications methods. It has the characteristics of rapid construction, low investment, and flexible application.
1. Security video transmission monitoring solution
In the case where wiring is not possible or wiring is difficult, Shenzhen Haidian Technology's HD-680 economical microwave video transmission system provides an integrated low-cost solution for effective resolution of short-distance and relatively small number of video transmission monitoring points. Cross the road, crossing the river and other unwiring problems. For the case where the number of points in the long-distance distance and monitoring video transmission is small and scattered, Shenzhen Haidian Technology's HD-680 economical microwave video transmission system provides an integrated low-cost best solution, and the investment may be 10% of the cable. It varies depending on the environment.
The Haidian HD-9500E series digital microwave is the best choice for monitoring video transmission with multiple points, centralized surveillance cameras, and a large number of relays.
2. Hybrid point-to-point/point-to-multipoint fixed wireless applications
In the user-intensive area of ​​the access layer, Alcatel Shanghai Bell 9400AWY microwave and Shanghai Bell Alcatel 7390 LMDS together to provide integrated solutions to solve the last kilometer access problem. The 9400AWY microwave provides an N×E1 interface to provide leased line service. In this way, the spectrum resources in a certain sector of LMDS may be avoided, or the user point capacity in a certain LMDS coverage area needs to be large, and it is not suitable to cover other sectors.
At the convergence layer, Shanghai Bell Alcatel 9500MXC/9600USY SDH microwaves can provide closed metropolitan optical rings and backup routes for fiber links.
In the backbone network, Alcatel Shanghai Bell 9600LSY can provide up to 2.5Gbps of transmission capacity, to meet the large-capacity long-distance backbone transmission requirements in a variety of complex environments.
3. Data service transmission scheme
The modern telecommunication network is developing from a pure voice network to a voice data mixed service network. In order to comply with this trend, modern microwave products should support data services (such as Ethernet services, ATMs) in addition to the transmission of voice services. Business) transmission. Alcatel Shanghai Bell Alcatel 9400/9500/9600 full range of microwave transmission products are able to meet the demand for the transmission of data services. Solve the enterprise network interconnection, WiMax base station solution access, DSL transmission, meet the small and medium capacity data transmission, and provide E1 + Ethernet hybrid services.
4. SCDMA base station access scheme
Due to the lack of pipeline resources and the lack of access to the last mile, many provinces in China Netcom and China Tietong have built SCDMA systems and carried out various basic services. But at the same time, they also face the problem of lack of transmission resources, and some base stations must use wireless access. Alcatel Shanghai Bell Alcatel 9400AWY PDH microwave can provide up to 16/32E1, transmission distance from a few kilometers to tens of kilometers, providing a strong guarantee for SCDMA base station wireless access. The 9500MXC single link can provide up to 75 E1s and supports up to six directions for use as an aggregate transmission for multiple SCDMA base stations.
Typical case of wireless transmission in fixed networks
In a fixed network, on the one hand, microwave transmission is limited by the geographical environment, the signal can be over the mountains and across the sea, and it can be applied to various terrain conditions and reach the areas where the cable cannot reach. Therefore, microwaves play a decisive role in the village-village project. On the other hand, some new operators lack resources on the metro access side, and microwave products with wireless transmission capabilities have become necessary alternatives to traditional access networks for optical fiber transmission equipment.
Tianjin Telecom Metropolitan Wireless Access Network
Tianjin Telecom, as a branch company of the China Telecom Group in the north, faced a serious lack of resources at the beginning of its establishment. Alcatel Shanghai Bell proposed the LMDS+PDH microwave integrated wireless solution to help users deploy fast services.
Project features:
LMDS covers dense metro areas and achieves the last mile access. In the case of exceeding the LMDS coverage and large capacity requirements, PDH microwave and LMDS complement each other and complement each other to achieve seamless coverage of the entire city.
The LMDS's unique IMA interface is suitable for 3G base station access and is ready for future 3G network construction.
Provides E1+Ethernet interface on one platform at the same time, realizes the integrated access of the circuit and data.
Annealed Steel Bar
Annealed steel bar is produced by annealing which is one kind of heat treatment to get proper hardness for machining. Our advantages and more services of annealed steel bar includes:
1) Wide range of diameters from 10mm to 300mm
2) Customized Length from 100mm to 12000mm
3) Good surface roughness: 0.4um to 1.5um
4) Good straightness: 0.5mm/m to 2mm/m
5) Good roundness: 80% of diameter tolerance
6) Diameter tolerance: -0.02mm to -0.06mm/h9, h10, h11
7) Matched further processing: Grinding, polishing, straightening
8) Anti-rusty package
9) Full sets of testing equipment: Surface, Dimenstion. Mechanical properties testing
10) Fast delivery time