移动承载网城域ER设备采用大容量路由器构建，具备高密度端口和大带宽汇聚

The metropolitan area ER equipment of the mobile bearer network is built with large-capacity routers, with high-density ports and large-bandwidth aggregation capabilities, and uses 10GE interfaces as the mainstay. For cities and cities with more B equipment, it is necessary to comprehensively compare the occupation and investment construction of the city's WDM or OTN and ER port resources, and choose a two-level ER (interconnection is mainly based on bare fiber and WDM/OTN is secondary) or one -Level ER+WDM/OTN/bare fiber networking

Mobile carrier domain ER equipment is built with high-capacity router, with high density port and large bandwidth aggregation capability, using 10GE interface as the main. For the cities where B equipment is more, it is necessary to comprehensively compare the occupation and investment construction of metro wave fractions or OTN and ER port resources, and select two-level ER (interconnection with bare fiber,wave fraction/OTN as a supplement) or a first-level ER-wave fraction/OTN/bare fiber networking method

The ER equipment of the mobile bearer network city domain is constructed with a large capacity router, with high-density port and large bandwidth convergence capacity, and mainly adopts 10GE interface. For cities with more B equipment, it is necessary to comprehensively compare the occupancy and investment of metropolitan wavelength division, OTN and ER port resources, and select two-level Er (interconnection is dominated by bare fiber, supplemented by wavelength division / OTN) or one-level ER + wavelength division / OTN / bare fiber networking mode<br>