缩写	全称	中文释义
MGCP	Media Gateway Control Protocol	媒体网关控制协议
CSDU	Core Service Data Unit	核心服务数据单元
PPSN	Public Packet Switched Network	公用分组交换网
STP	Signal Transfer Point	信号传输点
FERF	Far-End Receive Failure	远端接收失败
PABX	Private Automatic Branch Exchange	专用自动交换机
CCS	Centa- (hundred) Call Seconds	centa-（一百）呼叫秒
RLCI	Receive Line Clock Input	接收线时钟输入
ISDNUP	Integrated Services Digital Network User Part	综合业务数字网用户部分
ISM	Instrumentation, Scientific, and Medical	仪器、科学和医学