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| Number | Title | Issue Date |
| 4924510 | Telecommunications database accessing method Method and apparatus for reducing call setup time for calls to Advanced 800 customers by eliminating one database query. (Toll charges for 800 calls are paid by the called customer.) In the prior art, a call to an Advanced 800 customer required accessing ... | 05/08/1990 |
| 4914690 | Universal PBX interface A universal PBX-to-central office interface for standards conversion is described for supporting normally incompatible telephone equipment in PBX environments. The present invention is adapted for connection between the central office and a PBX along DID ... | 04/03/1990 |
| 4873718 | Feature telephone integration device A feature telephone integration device is disclosed. The device is intended for use in a PBX-type environment for use in a telephone system. The present invention uses communications with a feature phone as the source of information for an applications pr... | 10/10/1989 |
| 4852149 | Automated call filter A Call Filter System (CFS): (1) logically interfaces between a public telephone network and business customer premises equipment; (2) automatically processes incoming and outgoing calls which are amenable to such intervention; and (3) enlists the aid of h... | 07/25/1989 |
| 4811381 | Direct inward dial integration apparatus A direct inward dial integration device is connected to the trunk side of a PBX in a business telephone system. The present invention permits a voice message system (VMS) to answer forwarded calls with a personal greeting of a called party. When a direct ... | 03/07/1989 |
| 4792967 | PBX DID and E and M tie trunk integration adapter and method 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 conne... | 12/20/1988 |
| 4696028 | PBX Intercept and caller interactive attendant bypass system Disclosed is an intercept system for integrating the personalized services of switchboard attendants associated with on-premises PBX switching systems with the capabilities of the intercept system for allowing calling parties the opportunity to complete t... | 09/22/1987 |
| 4672660 | Method and system for identifying telephone callers An apparatus is disclosed for identifying who is placing a call to a telephone prior to answering. The apparatus, which is preferably located at the telephone central office, includes a switching matrix having a plurality of DID access lines coupling the ... | 06/09/1987 |
| 4629831 | Series connected interceptor The series connected interceptor is a control system for assisting in providing improved service operations for a PBX system. This control system is connected in series in a DID trunk between a TELCO central office and a PBX. By the nature of where it is ... | 12/16/1986 |
| 4600812 | Communication system having abbreviated dialing access In private PBX communication systems the number of dialing digits required to establish a connection between stations at different PBXs of the system includes PBX location code digits and station address digits. Abbreviated dialing is accomplished by usin... | 07/15/1986 |
