SS7 (Signaling System 7)
support it. See also all of the features listed above. See also CCS, CLASS, CO, ILEC, IXC, and signaling and control.
科学参考收录了5291条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。