PBX DID and E and M tie trunk integration adapter and method
US4792967A · kind A · utility
23Cited by
9References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1986 |
| Grant date | Dec 20, 1988 |
| Priority date | — |
| Expiry date | Feb 20, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q3/625
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A private branch exchange (PBX) direct in dailing (DID) and an E&M tie trunk voice message integration adapter and method is disclosed. The invention permits a calling party on a DID line to a desired extension connected to a PBX to be automatically connected to the called party's mailbox in a VMS when the called extension is busy or does not answer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.