本地交换运营商
ILincumbent local exchange carrier
IKEincumbent local exchange carrier
IDSLincumbent local exchange carrier
本地交换电信公司
LEC Local Exchange Carrier
本地交换网网管
Local switching network management
本地交换信道
LEC Local Exchange Channel
基本交换机无线电话业务
BETRS Basic Exchange Telephone Radio Service
基本交换机远程通信无线业务
BETRS Basic Exchange Telecommunications Radio Service
串接交换交换
tandem switching exchange
强奇异交换交换子代数
strongly singular maximal abelian self-adjoint sub
本地电话交换机
LTE Local Telephone Exchange