Do integration projects across the enterprise in general often encounter network, remote networking needs across the region, especially in security monitoring project, site deployment debugging, Party suddenly received a temporary requirement that all monitoring another point, this situation, in normal circumstances, it near the point of laying their own fiber optic cable, the far point directly to operators widening lanes on the line, but if the party is no longer a budget increase, or a very small increase such as increase of only a few percent of the entire project yet ? 
as a project for many years engaged in the management of old projects, pull-point leased line operators only when the preliminary budget can be added to the list later in the implementation, or pull the line from point to point transfer does not need to come, as the infrastructure upfront Party Party added ready to work, otherwise the construction of the half or the end of the re-consideration, it would be a very unhappy things, say a small impact the project schedule, project acceptance are engaged in big trouble, did most of the project know everything.
Often on the Internet to collect some information network networking products, the following several technical product or equipment to do a summary comparison:
1, most traditional networking is probably ninety eight percent of people know, ××× Network to achieve the conditions of this scheme is central terminal with a public IP network, in addition to business line, now there will be no ordinary broadband fixed public IP this to say. Deploy, simple is not simple that is hard to say, you see the level. ××× center of a device, each point one ××× equipment, the center will have access to each point of the front-end equipment, various front-end can visits I have not been tested. The overall cost is more expensive green central node, ××× equipment is now more popular.
2, play more fiery dandelion is a series of products, remote networking simple and quick, no special line does not require public IP, simple steps can network, VN technology. The default is 2M on the project can not use, transit-bandwidth charges, 4M-10M has, up there in the stand-alone server version, the price is relatively high, comparable to green. Compare allows users difficult to accept it is that each point is a fee of two or three points better, if a point a monitoring device, dozens or even hundreds of points, it is very embarrassing.
3, zero escape video surveillance transmission system, put this third place because of this and how much to use dandelion little similarities. No need to green, no public network IP, simple configuration. Networking Well, basically the same operation, but also by the bandwidth charges, but not because of the name is the transmission of video surveillance systems, all transit network bandwidth of 30M is to start large flow of propaganda SDN technology is guaranteed, the price is relatively cheaper dandelion more, not the median point is also a bright spot. 
4, there are currently many operators do off-site networking solution based SD-WAN technology, science and technology have Siyun rhinoceros, Yun-technology, large-scale manufacturers Ali cloud and so on, but pay more attention to provinces like this, cross-border and other places networking programs on security monitoring project does not seem particularly suited (personal feeling), because of the price (do the project why not say it), the technology is very mature, conditions can also try the next.
The above is a simple introduction for cross-network, cross-regional networking, and personal understanding, not the best solution, only for their own.