Facsimile and static presentation processing – Facsimile – Auxiliary signal
Patent
1996-12-13
2000-03-14
Nguyen, Madeleine
Facsimile and static presentation processing
Facsimile
Auxiliary signal
358442, 370235, H04N 100, H04N 132
Patent
active
060380373
ABSTRACT:
A novel and improved method and apparatus for providing an interface to a digital wireless telephone system compatible with standard analog wire line fax machines is described. To process a fax, a source interface waits until an interface to a destination fax machine has been established before establishing an interface to a source fax machine. The source fax transmission rate must be less than or equal to the destination fax transmission rate and the data rate of the digital channel. To establish the source fax interface at the proper rate, the source interface first selects and initial data rate from a set of standard fax transmission rates. The source interface sends unacceptable rate (failure to train) messages to the source fax machine until the source fax transmission rate is less than or equal to the data channel rate and the destination fax transmission rate. During fax processing, the destination interface inserts non-printing data (fill bits) if the destination fax transmission rate is greater than the source fax transmission rate. Fill bits are also inserted to compensate for transmission delays.
REFERENCES:
patent: H1413 (1995-02-01), Gunn
patent: 4727429 (1988-02-01), Ueno
patent: 4771335 (1988-09-01), Obara
patent: 5012489 (1991-04-01), Burton et al.
patent: 5297203 (1994-03-01), Rose et al.
patent: 5351134 (1994-09-01), Yaguchi et al.
patent: 5377017 (1994-12-01), Lam
patent: 5452289 (1995-09-01), Sharma et al.
patent: 5473676 (1995-12-01), Frick et al.
patent: 5515178 (1996-05-01), Dimolitsas et al.
patent: 5517323 (1996-05-01), Propach et al.
patent: 5566000 (1996-10-01), Propach et al.
patent: 5661568 (1997-08-01), Ueno
patent: 5663807 (1997-09-01), Propach et al.
patent: 5671270 (1997-09-01), Yoshida
patent: 5754310 (1998-05-01), Aoki et al.
patent: 5790641 (1998-08-01), Chan et al.
patent: 5808751 (1998-09-01), Hochman
"Recommendation V.21" CCITT, pp. 65-69.
"Toward a North American Standard for Mobile Data Services" Digital Signal Processing 2, by Richard A. Dean et al., Jan. 27-32, 1992, H04Q 7/2253.
"The GSM System for Mobile Communication," Lassay-Les-Chateaux, by Mouly M. et al., 1993, H04Q 7/04.
" Layer 2 Operation for Data/Fax" The Omni International Hotel, by Ericsson, Mar. 1-5, 1993.
" Data Services Working Paper: Protocol Structure for Data Services, Draft 1", The Omni International Hotel, by Richard P. Ejzak, Mar. 2, 1993.
" Burst Discriminator Options for Advanced Services" The Omni International Hotel, by Richard P. Ejzak, Mar. 4, 1993.
"Foreword," Telecommunications Industry Association, Sync-Data and Fax Services, Jul. 11, 1994.
Interoperable Wireless Data, IEEE Communications Magazine, by David Weissman et al., Feb. 31, 1993, H04Q 7/04N, pp. 68-77.
John Johnny K.
Leung Nikolai K. N.
Edmonston Brian S.
Miller Russell B.
Nguyen Madeleine
Qualcomm Incorporated
Rouse Thomas R.
LandOfFree
Digital network interface for analog fax equipment does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital network interface for analog fax equipment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital network interface for analog fax equipment will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-174961