Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 1: Protocol specification
综合业务数字网(ISDN);呼叫保持补充业务;数字用户信令系统第一号(DSS1)协议;第1部分:协议规范
发布日期:
1998-06-01
将ETS 300 102-1和相关I-ETS的参考更新为ETS 300 403。
Update references from ETS 300 102-1 and associated I-ETSs to ETS 300 403.