SYSTEM AND METHOD SERVICING NUMBER PORTABILITY IN AN INTEGRATION NETWORK OF THE VOICE OVER INTERNET PROTOCOL NETWORK AND THE PUBLIC SWITCHED TELEPHONE NETWORK
摘要
申请公布号
KR20050053919(A)
申请公布日期
2005.06.10
申请号
KR20030087172
申请日期
2003.12.03
申请人
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
