交换访问 meaning in English

switched access

Telecommunications - network performance - switched exchange access network transmission specifications
电信.网络性能.开关交换访问网络传输规范
Interface between carriers and customer installations - analog voice grade switched access lines using loop - start and ground - start signaling
电信公司和客户安装之间的接口，使用环路起始和地起始信令的模拟话音级交换访问线路。