Telephone system with current regulation in the constant...

Details Telephone system with current regulation in the constant... Telephone system with current regulation in the constant...

2005-12-27

2005-12-27

Swerdlow, Daniel (Department: 2646)

Telephonic communications

Subscriber line or transmission line interface

Power supply

C379S400000

Reexamination Certificate

active

06980648

ABSTRACT:
A telephone system includes a transmission line for connection to at least one telephone and a telephone interface in communication with the transmission line. The telephone interface provides DC power when a telephone connected to the transmission line is in an off-hook state. A controller in communication with the telephone interface generates a pre-defined DC characteristic of the telephone interface, and a regulator in communication with the controller adaptively translates the DC characteristic.

REFERENCES:
patent: 4935960 (1990-06-01), Takato et al.
patent: 5335272 (1994-08-01), Lofmark et al.
patent: 5619567 (1997-04-01), Apfel
patent: 6122367 (2000-09-01), Eriksson et al.
patent: 6731749 (2004-05-01), Sacca et al.
patent: 0269579 (1988-06-01), None
patent: 0917339 (1999-05-01), None
patent: WO 91/11876 (1991-08-01), None

Affiliated with

Also associated with

Rating

Telephone system with current regulation in the constant... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Telephone system with current regulation in the constant..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telephone system with current regulation in the constant... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3472040