Simultaneous voice and data communications

• US 5,625,677 A
• Filed: 12/30/1993
• Issued: 04/29/1997
• Est. Priority Date: 12/30/1993
• Status: Expired due to Term

• Current Assignee: AT&T IPM Corp. (AT&T, Inc.)
• Original Assignee: AT&T, Inc.
• Inventors: Freeman, Brian D., Strahs, Lee B., Feiertag, Alan I., Rochkind, Mark M., Hanson, Bruce L.
• Primary Examiner(s): WOO, STELLA L
• Application Number:
  US08/176,002
• Time in Patent Office: 1,216 Days
• Field of Search: 379/93, 379/94, 379/96, 379/97, 379/98, 379/100, 379/201, 379/202, 379/222, 370/60, 370/60.1, 370/62, 370/76, 370/110.1, 370/110.4, 370/86, 370/69.1, 348/13, 348/14, 348/15, 348/16, 348/17, 375/227
• US Class Current: 370/493
• CPC Class Codes: H04M 11/06 Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

Abstract

An improvement in providing simultaneous voice and data communication is achieved by provisioning within the public switched telephone network one or more simultaneous voice/data (SVD) modems that a) can communicate with SVD modems of the network users over a single "plain old telephone service" (POTS) connection, and b) can separate, and deliver to different destinations the voice and data channels received from an SVD modem. The SVD modems in the network can also combine voice and data traffic from separate sources for transmission together over a single POTS connection to a user'"'"'s SVD modem. In one embodiment of the invention, an SVD modem pool is provided by an inter-exchange carrier. The voice and data channels of an SVD call are separated at the network side of the SVD modem pool, so that they may be routed to different destinations. The voice channel of the call a) may be routed in the usual manner to a voiceband destination device or b) it may be routed to an SVD modem pool for possible combination with a data channel for delivery to an end-point subscriber who has an SVD modem. The data channel or the call may be routed over the packet network to a) a conventional data device or b) an SVD modem pool for possible combination with a voice channel for delivery to the end-point subscriber who has an SVD modem.

Claims

1. A system for routing voice/data calls through a public switched network comprising:

means in said public switched network for receiving a transmission from a simultaneous voice/data (SVD) modem, said transmission having a voice channel and a data channel, said voice and data channels having a combined bandwidth of about 3200 Hertz; and

means in said public switched network for supplying said voice and data channels to separate destinations such that voice and data calls can be carried via said voice and data channels in any order of said calls being attempted.

2. The system defined in claim 1 wherein said transmission traverses a network of a first contact service provider for a telephone line connected to said SVD modem prior to reaching said means for receiving.

3. A system for routing voice and data calls through a public switched network comprising:

means in said public switched network for receiving a transmission from a simultaneous voice/data (SVD) modem, said transmission being received via a communications path having a bandwidth of about 3200 Hertz; and

means in said public switched network for (i) separating said transmission into its constituent voice and data channels and (ii) routing said voice and data channels through said network to separate destinations such that voice and data calls can be carried via said channels in any order of said calls being attempted.

4. The system set forth in claim 3 wherein said means for separating and routing includes another SVD modem connected to another communications path having a bandwidth of about 3200 Hertz.

5. The system set forth in claim 3 wherein said means for separating and routing includes a circuit switched network for routing said voice channel and a packet network for routing said data channel.

6. The system set forth in claim 3 wherein said means for separating and routing routes said data channel to a destination within said public switched network.

7. The system set forth in claim 3 wherein said means for separating and routing routes said voice channel to a destination external to said public switched network.

8. The system set forth in claim 3 wherein said public switched network is a network for connecting together (i) a network to which at least one caller is directly connected when said caller is placing said voice and data calls using another SVD modem connected to another communications path having a bandwidth of about 3200 Hertz, and (ii) at least one network to which at least one of the destinations of said voice and data calls is directly connected.

9. The system set forth in claim 3 wherein said public switched network is a network that directly connects to a caller placing said voice and data calls using another SVD modem connected to another communications path having a bandwidth of about 3200 Hertz.

10. The system set forth in claim 3 further including:

means for receiving separate voice and data channels originating from distinct origination points; and

means for combining said separate voice and data channels for transmission over a single POTS channel in an SVD modem recognized format.

11. The system set forth in claim 10 wherein said means for combining comprises another SVD modem connected to another communications path having a bandwidth of about 3200 Hertz.

12. The system defined in claim 3 wherein said public switched network is an Interexchange network.

13. The system defined in claim 3 wherein said SVD modem is connected to a local network which connects between said SVD modem and said public switched network and forwards said transmission from said SVD modem to said means for receiving in said public switched network.

14. A system for routing voice and data calls through a public switched network comprising

means in said public switched network for receiving separate voice and data channels originating from distinct originating points;

and

means in said public switched network for combining said separate voice and data channels for transmission over a single POTS channel in a format recognized by an SVD modem.

15. The system defined in claim 14 further including means for transmitting said combined voice and data channels from said public switched network over a POTS channel to a network of a first contact services that is connected to an SVD modem for receiving said combined voice and data channels.

16. A system for routing through a public switched network a voice channel and a data channel, said voice channel and said data channel being supplied to said public switched network on a POTS channel as a combined signal from an SVD modem of a user, said arrangement comprising:

a circuit switched network;

a packet switched network;

a simultaneous voice/data modem in said public switched network for reconstituting said voice channel and said data channel from said combined signal;

wherein (I) said POTS channel is supplied to said simultaneous voice/data modem in said public switched network, (ii) said voice channel, as reconstituted, is routed over said circuit switched network, and (iii) said data channel, as reconstituted, is routed over said packet switched network.

17. The system defined in claim 16 further including means for directing a voice channel received from said circuit switched network and a data channel received from said packet network to said simultaneous voice/data modem in said public switched network for combination into a signal for transmission to said user'"'"'s simultaneous voice/data modem over said POTS channel.

18. A public switched telephone network comprising:

a circuit switched network;

a packet switched network;

a simultaneous voice/data (SVD) modem for combining a voice call from said circuit switched network with a data call from said packet switched network and for transmitting the resulting combination over a single POTS channel.

19. A method for use in a telephone network, comprising the steps of:

determining that a call has been placed to a subscriber having a simultaneous voice/data (SVD) modem, said SVD modem having voice and data channels with a combined bandwidth of about 3200 Hertz; and

routing said call through an equivalent SVD modem in said telephone network prior to routing said call to said subscriber, wherein said subscriber can receive said call on one of the two voice and data channels provided by said subscriber'"'"'s SVD modem without interfering with said subscriber'"'"'s ability to use the other of said two voice and data channels for another call.

20. The method defined in claim 19 wherein said call is placed by dialing a translatable number, and wherein said determining step comprises the steps of:

translating said translatable telephone number to the destination address of an SVD modem pool in said telephone network, said SVD modem pool a) being comprised of a plurality of SVD modems each one of said SVD modems having voice and data channels with a bandwidth of about 3200 Hertz and b) including said equivalent SVD modem; and

wherein said routing step further comprises the steps of;

retrieving a telephone number of a telephone line by which the called subscriber is connected to the telephone network; and

using said retrieved telephone number as the telephone number of said subscriber to which said call is routed.

21. The method defined in claim 19 wherein said determining step includes the step of:

looking up an indication of said subscriber'"'"'s destination address in a data base.

22. The method defined in claim 19 wherein said call is a data only call.

23. The method defined in claim 19 wherein said call is a voice only call.

24. The method defined in claim 19 wherein said routing step is independent of whether or not said call previously passed through any other equivalent SVD modem.

25. A method for use in completing a telephone call in a telephone network comprising the steps of:

receiving a call placed to a translatable telephone number;

translating said translatable telephone number to the destination address of a simultaneous voice/data (SVD) modem pool in said telephone network, said modem pool being comprised of a plurality of SVD modems each one of said SVD modems having voice and data channels with a bandwidth of about 3200 Hertz;

retrieving a telephone number of a telephone line by which the called subscriber is connected to said telephone network that is stored in association with said translatable telephone number;

routing said call through an SVD modem in said SVD modem pool so that said call is carried on one of the two combined channels that is output by said SVD modem; and

using said retrieved telephone number as the telephone number of said subscriber to which the output of said SVD modem is routed.

26. A method for use in completing a telephone call in a public switched telephone network comprising the steps of:

recognizing that a received call placed to a subscriber was placed by dialing a translatable telephone number;

translating said translatable telephone number to the destination address of a simultaneous voice/data (SVD) modem pool in said telephone network, said modem pool being comprised of a plurality of SVD modems each one of said SVD modems having voice and data channels with a bandwidth of about 3200 Hertz;

retrieving a telephone number of a telephone line by which the called subscriber is connected to said public switched telephone network that is stored in association with said translatable telephone number;

determining that a call is already being routed through a particular SVD modem of said SVD modem pool to said retrieved telephone number;

determining that the channel needed to carry said call from said particular SVD modem of said SVD modem pool to a specific SVD modem of said called subscriber is available; and

routing said call through said particular SVD modem of said SVD modem pool so that said call is carried on the available one of the two combined channels that is output by said particular SVD modem of said SVD modem pool.

27. Apparatus for use in completing a telephone call having either a data content or a voice content, comprising:

means for storing a list of telephone lines that are connected to simultaneous voice/data (SVD) modems;

means for determining that a destination telephone line of said telephone call is listed in said list;

an SVD modem connected in a network for receiving separate data and voice channels and for developing as an output a combined voice and data signal capable of being transmitted from said network over a single POTS channel;

means for routing said call though said SVD modem in said telephone network over the one of said data and voice channels that matches the content of said call; and

means for causing the output of said SVD modem in said telephone network to be transmitted over a particular single POTS channel to said SVD modem connected to said destination telephone line, whereby a second call can be carried over said single POTS channel.

28. A method for use in a public switched network having a simultaneous voice/data (SVD) modem having a bandwidth of about 3200 Hertz, and providing first and second communication channels, said method comprising the steps of:

receiving a call placed to a telephone number of a subscriber who has an SVD modem with voice and data Channels having a bandwidth of about 3200 Hertz, said call being received when said subscriber'"'"'s telephone line is already in use on another call using said first channel provided by said subscriber'"'"'s SVD modem;

determining that said received call can be carried over said second channel provided by said subscriber'"'"'s SVD modem;

placing, by said SVD modem in said public switched network, said received call into said second channel and combining said second channel with said first channel for communication with said SVD modem of said subscriber.

29. A method for use in a public switched network having a simultaneous voice/data (SVD) modem providing first and second communication channels, the method comprising the steps of:

receiving a call placed to a telephone number of a subscriber having an SVD modem whose telephone line is already in use on a call using said first channel provided by said subscriber'"'"'s SVD modem;

determining that said received call can be carried over said second channel provided by said subscriber'"'"'s SVD modem; and

routing said call to said SVD modem in said public switched network;

combining said call with said first channel so that a combined signal that fits within a POTS channel is produced and in which said call is carried in said second channel, said combined signal being for communication with said SVD modem of said subscriber.

30. A method for controlling the routing of a call in a public switched telephone network comprising the step of:

routing a call in joint response to (i) the provisioning of a simultaneous voice/data (SVD) modem at the destination of said call, said modem having voice and data channels with a bandwidth of about 3200 Hertz, and (ii) the existence of another call through said SVD modem at the time said call is to be routed, said another call being of a type different from that of said call.