Modem with noise eliminating circuit

Details Modem with noise eliminating circuit Modem with noise eliminating circuit

1997-01-17

1999-03-30

Zele, Krista

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

379373, 375222, 375346, H04M 1100

Patent

active

058898417

ABSTRACT:
A modem connected to a telephone line and capable of preventing noise from being generating upon the modem being powered-on or reset includes a ring detector for receiving a ring signal associated with an incoming telephone call through the telephone line and converting the ring signal to a binary ring signal; a datapump for processing the incoming telephone call; a controller coupled to the datapump and responsive to the ring detector, for generating an off-hook signal upon the ring signal to be detected, the off-hook signal including a leading portion of a pulse type constituting noise; a noise eliminating circuit for eliminating the leading portion of a pulse type included in the off-hook signal; and a modem driver for driving the modem in response to the off-hook signal from the noise eliminating circuit to cause a remote computer to communicate with a local computer connected to the modem or to switch a calling telephone to communicate with a called telephone. By the use of the modem, an off-hook signal constituting noise can be eliminated, the noise occurring instantly upon the modem being powered-on or reset. Therefore, no noise is introduced into the telephone line while the telephone of one calling subscriber is connected to the telephone of a called subscriber.

REFERENCES:
patent: 4883993 (1989-11-01), Confalonieri et al.
patent: 4903282 (1990-02-01), Botker
patent: 4958158 (1990-09-01), Hashizume
patent: 5361296 (1994-11-01), Reyes et al.
patent: 5369402 (1994-11-01), Kwon
patent: 5572549 (1996-11-01), Shimomura et al.

Affiliated with

Also associated with

Rating

Modem with noise eliminating circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Modem with noise eliminating circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modem with noise eliminating circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1221740