US5369636A — Multiple communication speed converting apparatus

Claim 1

Independent Claim 255 words

A multiple speed converting apparatus, comprising: speed adjusting means for achieving a speed adjustment in conformity with the V.110 of the CCITT recommendations; time-sharing switching means connected to the speed adjusting means for conducting a multiplexing operation in a time-sharing manner; a number of R reference point speed adjusting means connected to the time-sharing switching means and an R reference point interface stipulated according to the CCITT recommendations for supplying data to the switching means at a synchronizing speed; and control means responsive to the number of R reference point speed adjusting means for setting a communication speed between the switching means and the R reference point speed adjusting means to a fixed speed not exceeding 32 kbps, the fixed speed being associated with a synchronous mode; wherein the R reference point speed adjusting means includes: selecting means connected to the R reference point interface for achieving a change-over operation between signal lines according to a mode of a user interface; first rate adapting means connected to the selecting means; second rate adapting means connected to the first rate adapting means; and third rate adapting means connected to the second rate adapting means, the first rate adapting means achieving, when the user interface is in an asynchronous mode, communications with the second rate adapting means at a speed of 2 n ×600 bps (n=0, 1, 2, 3, 4, or 5), the second rate adapting means achieving communications with the third rate adapting means at a speed of 2 k ×8 kbps (n=0, 1, or 2).

Claim 2

Dependent Claim 255 words

A multiple speed converting apparatus, comprising: speed adjusting means for achieving a speed adjustment in conformity with the V.110 of the CCITT recommendations; time-sharing switching means connected to the speed adjusting means for conducting a multiplexing operation in a time-sharing manner; a number of R reference point speed adjusting means connected to the time-sharing switching means and an R reference point interface stipulated according to the CCITT recommendations for supplying data to the switching means at a synchronizing speed; and control means responsive to the number of R reference point speed adjusting means for setting a communication speed between the switching means and the R reference point speed adjusting means to a fixed speed not exceeding 32 kbps, the fixed speed being associated with a synchronous mode; wherein the R reference point speed adjusting means includes: selecting means connected to the R reference point interface for achieving a change-over operation between signal lines according to a mode of a user interface; first rate adapting means connected to the selecting means; second rate adapting means connected to the first rate adapting means; and third rate adapting means connected to the second rate adapting means, the first rate adapting means achieving, when the user interface is in an asynchronous mode, communications with the second rate adapting means at a speed of 2 n ×600 bps (n=0, 1, 2, 3, 4, or 5), the second rate adapting means achieving communications with the third rate adapting means at a speed of 2 k ×8 kbps (n=0, 1, or 2).

Claim 3

Dependent Claim 53 words

An apparatus as claimed in claim 1, wherein the R reference point speed adjusting means further includes an OR gate for producing a logical sum between a data terminal ready signal and a transmission request signal sent from the user as signal information items and outputting the logical sum to the selecting means.

Claim 4

Dependent Claim 196 words

A multiple speed converting apparatus, comprising: a communication speed adjusting circuit conforming to the CCITT V.110 recommendations; a time-sharing switch connected to the communication speed adjusting circuit; a plurality of R reference point speed adjusters, connected to the time-sharing switch, adjusting a communication speed to an R reference point interface stipulated by the CCITT recommendations, based on a number of users of R reference point interfaces; and a central control circuit connected to the communication speed adjusting circuit, the time-sharing switch, and the plurality of R reference point speed adjusters, setting a communication speed between the time-sharing switch and the R reference point speed adjusters; wherein the R reference point speed adjuster includes: a logical OR gate, producing a sum signal of signal lines including a data terminal ready signal and a transmission request signal; a selector, achieving a change-over operation between signal lines according to a user interface mode, connected to the sum signal and at least a portion of the signal lines; a zeroth rate adaption; connected to the selector; a first rate adaption, connected to the selector and the zeroth rate adaption; and a second rate adaption, connected to the first rate adaption.

Claim 5

Dependent Claim 196 words

A multiple speed converting apparatus, comprising: a communication speed adjusting circuit conforming to the CCITT V.110 recommendations; a time-sharing switch connected to the communication speed adjusting circuit; a plurality of R reference point speed adjusters, connected to the time-sharing switch, adjusting a communication speed to an R reference point interface stipulated by the CCITT recommendations, based on a number of users of R reference point interfaces; and a central control circuit connected to the communication speed adjusting circuit, the time-sharing switch, and the plurality of R reference point speed adjusters, setting a communication speed between the time-sharing switch and the R reference point speed adjusters; wherein the R reference point speed adjuster includes: a logical OR gate, producing a sum signal of signal lines including a data terminal ready signal and a transmission request signal; a selector, achieving a change-over operation between signal lines according to a user interface mode, connected to the sum signal and at least a portion of the signal lines; a zeroth rate adaption; connected to the selector; a first rate adaption, connected to the selector and the zeroth rate adaption; and a second rate adaption, connected to the first rate adaption.

Claim 6

Dependent Claim 34 words

An apparatus as claimed in claim 3, wherein the zeroth rate adaption achieves a first communication speed with the first rate adaption of 2 n ×600 bps (n=0, 1, 2, 3, 4, or 5).

Claim 7

Dependent Claim 31 words

An apparatus as claimed in claim 4, wherein the first rate adaption achieves a second communication speed with the second rate adaption of 2 k ×8 kbps (k=0, 1, or 2).

Claim 8

Dependent Claim 21 words

An apparatus as claimed in claim 5, wherein the second rate adaption adjusts a third communication speed to the time-sharing switch.

Claim 9

Dependent Claim 23 words

An apparatus as claimed in claim 3, further comprising a clock generating circuit generating and supplying a clock signal to the rate adaptions.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1997-11-28	1998-05-30	1998-11-29	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2001-11-28	2002-05-30	2002-11-29	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2005-11-28	2006-05-30	2006-11-29	$7700.00	Window Closed / Lapsed

Multiple communication speed converting apparatus

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