公开(公告)号：JPH09214627A

公开(公告)日：1997-08-15

申请号：JP31347196

申请日：1996-11-25

Applicant: IBM

Inventor： CINA MICHAEL FRANK ,  FLINT EPHRAIM BEMIS ,  GAUCHER BRIAN PAUL ,  KWARK YOUNG HOON ,  OPRYSKO MODEST MICHAEL ,  PENCE WILLIAM EDWARD ,  PONNAPALLI SAILA

IPC: H04M1/725 ,  H04M11/00 ,  H04W4/18 ,  H04W24/00 ,  H04W68/00 ,  H04W76/02 ,  H04W84/10 ,  H04W88/08 ,  H04Q7/38

Abstract: PROBLEM TO BE SOLVED: To provide a cordless modem including a pair of radio units interfacing to a standard data/fax modem in order that the user of a personal computer can connect to a telephone line by radio. SOLUTION: One of the pair of the radio units 32 and 34 is set to be a remote unit 32 interfacing to a modem housed in a PC(personal computer) and the other is set to be a base station unit 34 connected to a standard wall telephone jack. By this solving way, a user obtains the convenience and freedom of using the PC, a lap top, a personal digital assistant(PDA), etc., within the range of 100 to 200m from the telephone jack without the interference of a code. When a signal intensity between one pair of the radio units 32 and 34 is not more than a prescribed threshold value, an alarm on the remote unit informs the user of it.

公开(公告)号：MY120688A

公开(公告)日：2005-11-30

申请号：MYPI9700117

申请日：1997-01-10

Applicant: IBM

Inventor： CINA MICHAEL FRANK ,  FLINT EPHRAIM BEMIS ,  GAUCHER BRIAN PAUL ,  KWARK YOUNG HOON ,  OPRYSKO MODEST MICHAEL ,  PENCE WILLIAM EDWARD ,  PONNAPALLI SAILA

IPC: H04M1/725 ,  H04M11/00 ,  H04W4/18 ,  H04W24/00 ,  H04W68/00 ,  H04W76/02 ,  H04W84/10 ,  H04W88/08

Abstract: A CORDLESS MODEM COMPRISES A RADIO PAIR INTERFACED TO A STANDARD DATA/FAX MODEM (36) WHICH ALLOWS A USER OF A PERSONAL COMPUTER (30) TO WIRELESSLY CONNECT TO A TELEPHONE LINE. ONE END OF THE RADIO PAIR IS A REMOTE UNIT (32) INTERFACED TO THE MODEM CONTAINED WITHIN THE PC WHILE THE OTHER END IS A BASE UNIT (34) CONNECTED TO A STANDARD TELEPHONE WALL JACK (40, 90). 'THIS ARRANGEMENT ALLOWS THE USER THE CONVENIENCE AND FREEDOM OF USING A PC, LAPTOP, PERSONAL DIGITAL ASSISTANT, ETC., WITHIN SEVERAL HUNDRED FEET OF A PHONE JACK WITHOUT BEING ENCUMBERED BY A CORD. A WARNING ALARM (61) ON THE REMOTE UNIT INFORMS THE USER WHEN THE SIGNAL STRENGTH BETWEEN THE RADIO PAIR IS BELOW A THRESHOLD VALUE. ADDITIONALLY, THE BASE UNIT MAY BE EQUIPPED WITH TWO SPATIALLY SEPARATED ANTENNAS (70, 70') TO HELP MITIGATE THE EFFECTS OF SIGNAL FADING.