Aim at on the distribution of rural households is not concentrated

the large investment in construction etc. characteristics

calculate out of optical cable cross connecting cabinet of coverage household number and selection model

put out to setting up position of optical cable cross connecting cabinet the advise

at the same time

calculation of trunk optical cable core number according to the coverage household number of administrative villages

the ratio of benefi t and income of construction investment again

the system theory analyses and gives the construction condition of the broadband trunk optical cable and its wiring optical cable in rural area.