But if you choose from the first-line brands you listed, Simon and CommScope are the first-line brands among the first-line brands. Although it's hard to tell the difference between good and bad, we can see from another aspect that the market recognizes them: I remember reading a survey that from 2008 to 20 10, the sum of CommScope and Simon accounted for about 50% of the total number of projects with more than 10000 information points in China.
In addition: here is a ranking, which is not necessarily rigorous, but also has certain reference value:/html/2012-05/24897.html.