Telephonic communications – Subscriber line or transmission line interface
Patent
1988-09-06
1991-01-08
Mis, David
Telephonic communications
Subscriber line or transmission line interface
379383, H04J 304
Patent
active
049842668
ABSTRACT:
A subscriber line card arrangement, in which each of eight subscriber lines is interfaced by a respective high voltage analog circuit, followed by a low voltage circuit for producing essential analog functions including over-sampled analog-to-digital and digital-to-analog conversion. A single CMOS digital signal processor (DSP) is multiplexed between each of the eight channels to perform digitial signal processing of the telephone signals in each channel. Silicon usage for the high voltage functions is reduced as is the amount of bipolar analog circuitry. Digital hardware is saved by multiplexing the DSP. The invention is useful in central offices and PABX's.
REFERENCES:
patent: 4451708 (1984-05-01), Kemler et al.
King Robert L.
Mis David
Motorola Inc.
LandOfFree
Subscriber line card arrangement does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Subscriber line card arrangement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Subscriber line card arrangement will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-941466