发明名称 |
Method and apparatus for providing virtual facility communication service |
摘要 |
A communication system is arranged to provide a virtual private line facility connection to another communication system using the public switched network. In response to a predetermined signal preceding a called party dialing signal received from a user, the system accesses a virtual facility table to obtain an intersystem dialing signal necessary to establish a connection to an access line of the other communication system. The system sends the intersystem dialing signal followed by the called party dialing signal to the public switched network. The intersystem dialing signal establishes a connection to the other system which then uses the received called party dialing signal to establish a connection from that system to the called party. The virtual facility table is made accessible to speed dialing, repertory dialing, station message detail recording and automatic route selection features of the system.
|
申请公布号 |
US4802199(A) |
申请公布日期 |
1989.01.31 |
申请号 |
US19870064648 |
申请日期 |
1987.06.22 |
申请人 |
AMERICAN TELEPHONE AND TELEGRAPH COMPANY;AT&T INFORMATION SYSTEMS INC. |
发明人 |
LANGE, MICHAEL D.;SMITH, NICHOLAS K.;WILLEMS, CARL |
分类号 |
H04M1/27;H04M1/2745;H04Q3/00;H04Q3/62;(IPC1-7):H04M1/27;H04M3/42 |
主分类号 |
H04M1/27 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|