Multiple data set which time-shares circuitry among a plurality of channels专利检索-进度条图形用户界面用户界面接口电脑零配件专利检索查询-专利查询网

Multiple data set which time-shares circuitry among a plurality of channels

阅读：506发布：2023-07-18

专利汇可以提供Multiple data set which time-shares circuitry among a plurality of channels专利检索，专利查询，专利分析的服务。并且A plurality of telephone lines which convey frequency-shift signals and a corresponding plurality of data machines, which send and receive DC baseband data, are interconnected via a timeshared digital (filter) circuit receiver and digital circuit modulator under the supervision of a common central processor. The processor follows the progress of each call and determines when supervisory functions are required. These functions includes placing the telephone line in an on-hook or an off-hook condition, returning answer back signals, monitoring the line for incoming calls by detecting incoming ringing signals and, after the call is answered, monitoring the line for a continuous connection by detecting incoming carrier signals. A low-pass digital filter is arranged to filter the incoming signals to detect ringing or, alternatively, to filter the sum of the signaling frequencies to detect carrier. To detect the lowfrequency ringing, the response of the filter is modified by limiting the rate at which the input signals are applied thereto and by ''''holding'''' the processed signals in the filter for the prolonged interval between the input signal applications.，下面是Multiple data set which time-shares circuitry among a plurality of channels专利的具体信息内容。

权利要求

1. A multiple data set for interconnecting a plurality of data machines capable of transmitting and receiving baseband data signals with a corresponding plurality of transmission channels capable of carrying voice frequency signals comprising: a receiver, which includes digital circuitry, for converting voice frequency signal samples to baseband data signal samples; a modulator, which includes digital circuitry, for converting baseband data signal samples to voice frequency signal samples; scanning means for deriving samples of the incoming voice frequency signals from all of the channels during each of successive scanning cycles and applying the samples of the signal from each channel to the receiver during a time slot allocated to the channel in each cycle; distributing means for distributing the output signal samples obtained from the modulator to each channel during the time slot allocated thereto; and common processing means responsive to an incoming call on any channel for distributing the output baseband data samples obtained from the receiver during the allocated time slot to the corresponding machine and for applying samples of the baseband data signal obtained from the corresponding machine to the modulator during the allocated time slot.

2. A multiple data Set in accordance with claim 1 wherein the common processing means comprises a sequential machine which assumes various states during the time slots allocated to each of the channels.

3. A multiple data set in accordance with claim 2 wherein the sequential machine includes translating means responsive to the incoming calls and the incoming signals from each of the channels for determining the identity of the next state to be assumed during the time slot allocated to the channel.

4. A multiple data set in accordance with claim 2 wherein the sequential machine includes translating means responsive to the incoming calls and the incoming signals from each of the channels and to the state assumed by the sequential machine for controlling the data sample distribution and application provided by the common processing machine.

5. A multiple data set in accordance with claim 4 wherein means responsive to the translating means are provided for each channel for alternatively placing the channel in an on-hook condition and an off-hook condition.

6. A multiple data set in accordance with claim 4 wherein the sequential machine includes means for generating signal samples of supervisory signals and the translating means alternatively applies to the modulator the data samples obtained from the data machine and the supervisory signal samples.

7. In a multiple data set for processing signals received from a plurality of transmission channels; detecting means which includes digital circuitry and which is alternatively arrangeable to detect incoming ringing and incoming carrier signals from each of the channels; and a processor for time-sharing the detecting means among the plurality of channels, the said processor including means for initially arranging the detecting means to detect ringing signals while the detecting means is allocated to each channel and means responsive to the detection of ringing signals from any channel for arranging the detecting means to detect carrier signals while the detecting means is allocated to the channel.

8. In a multiple data set in accordance with claim 7 wherein the detecting means comprises a low-pass filter, a first path for applying signals received from the channels to the filter, a second path for summing the signal frequencies received from the channels and applying the summed signals to the filter and gating means responsive to the processor for enabling the first path during the initial period when the detecting means is arranged to detect ringing signals and for enabling the second path during the period when the detecting means is arranged to detect carrier signals.

9. In a multiple data set in accordance with claim 8 wherein the low-pass filter comprises a digital filter and the second path includes at least two digital filters, in parallel, and an adder circuit for summing the output of the parallel digital filters.

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Multiple data set which time-shares circuitry among a plurality of channels

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