Telephonic communications – Call or terminal access alarm or control – At substation
Patent
1997-11-12
2000-10-03
Tsang, Fan
Telephonic communications
Call or terminal access alarm or control
At substation
379204, 379210, 379211, H04M 166
Patent
active
061283754
ABSTRACT:
A single and versatile standalone apparatus that provides for remote control of several custom calling services such as call forward, call bridge, call transfer, conference call and call back. The apparatus is flexible enough to be further used as a remote store and forward dialer for various other services. The device is controlled by a microcontroller and has non-volatile memory to facilitate storage of configuration options. It can be connected directly to the analog public switched telephone network (PSTN) or to private branch exchanges (PBXs) supporting analog loop signaling. The device also has means to transmit and receive tone dialing and hook signals. Furthermore, the device supports both remote usage and reconfiguration. What this invention embodies is a single apparatus that is capable of handling several functions previously only available via several separate devices. The device is designed as a standalone home appliance that can be easily installed by the end-user and which requires little or no maintenance.
REFERENCES:
patent: 5673299 (1997-09-01), Fuller et al.
Punzalan Edilberto Abad
Soria, Jr. Alejandro Bonifacio
Bui Bing
Tsang Fan
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