Inter-exchange Signalling Protocol 内部交换信令协议 ; 交换间信令协议 ; 互换信令协议

Broadband ISDN - Meta-Signalling Protocol 宽带ISDN

Meta-signalling protocol 元信号协议

frame relay signalling protocol 帧中继信令协议

inter-switch interim signalling protocol 交换机间的临时信令协议

Signalling Link Protocol 信令链路协议

Signalling Connection Control Protocol 信令连接控制协议