Method and apparatus for detecting switched network protocols

Claim 2

A network interfacing apparatus for interfacing at least one unit of terminal equipment to a switched network having at least one channel for receiving information including data from a remote site in accordance with either one of at least two distinct and predefined protocols, wherein each of said predefined protocols is identified by at least one predefined characteristic data value uniquely positioned within a predetermined sequence of values within a unit of information, said apparatus comprising: receiving means for receiving at least one unit of information from said channel; at least two protocol system means, one for each of said predefined protocols, for enabling said apparatus to communicate over said channel with said remote site according to a select one of said predefined protocols; comparing means for respectively comparing at least one characteristic data value of said at least one unit of information received by said receiving means with at least one predefined characteristic data value used to identify said predefined protocols so as to identify the predefined protocol of the unit of information received by said receiving means; and means for selecting and enabling the appropriate one of said protocol system means in response to a match between the at least one characteristic data value of said at least one unit of information and the at least one predefined characteristic data value used to identify said predefined protocols, so as to permit said apparatus to communicate over said channel with the remote site according to the selected one of said predefined protocols.

Claim 3

A network interfacing apparatus according to claim 1, further comprising at least a third protocol system means for enabling said apparatus to communicate with said remote site according to a third protocol of said predefined of protocols.

Claim 4

A network interfacing apparatus according to claim 1, further comprising: at least a third protocol system means for enabling said apparatus to communicate over said channel with said remote site according to a third protocol of said predefined of protocols; means for selecting and enabling the third protocol system means in response to a match between the at least one characteristic data value of said at least one unit of information and the at least one predefined characteristic data value used to identify said predefined protocols, so as to permit said apparatus to communicate over said channel with the remote site according to the selected one of said predefined protocols.

Claim 5

A network apparatus according to claim 1, wherein each of said predefined protocols is a data link protocol for the transfer of data across a switched network.

Claim 6

A network apparatus according to claim 1, wherein each of said predefined protocols is a data link protocol for the transfer of data across an ISDN network.

Claim 7

A network apparatus according to claim 1, wherein said at least one characteristic data value is defined within at least one data field in said at least one unit of information; and wherein said comparing means includes means for respectively comparing the data values within the at least one data field within at least one unit of information received by said receiving means with at least one of the corresponding predefined characteristic data values used to identify said predefined protocols.

Claim 8

A network apparatus according to claim 1, further comprising at least a third protocol system means for enabling said apparatus to communicate over said channel with said remote site according to a third protocol of said predefined of protocols; and a default protocol selection and enabling means for selecting and enabling the third protocol system means when said comparing means is unable to match any of the at least one characteristic data values of said at least one unit of information received by said receiving means with the at least one predefined characteristic data values used to identify said predefined protocols.

Claim 11

The method according to claim 8, wherein the step of selecting and enabling includes the step of selecting and enabling a default protocol system means for transmitting information over said channel in accordance with the default one of said protocols when the at least one characteristic data values of said at least one unit of information fails to match, during said step of comparing, with the any of the at least one predefined characteristic data values used to identify said predefined protocols.

Claim 12

The method according to claim 8, wherein each of said predefined communication protocol is a data link layer protocol.

Claim 13

A network interfacing apparatus for interfacing at least one unit of terminal equipment to a switched network having at least one channel for transferring information including data to and from a remote system in accordance with any one of at least two predefined protocols, said apparatus comprising: communication means for transmitting and receiving units of information via said channel; at least two protocol system means, one for each of said predefined protocols, for enabling said apparatus to communicate via said channel with said remote system according to any one of said predefined protocols; controller means for controlling said communication means, said controller means including means for selecting a first protocol system means to attempt to establish a data link connection between said apparatus and said remote system according to said first protocol, and means for selecting and enabling said first protocol system means if said data link connection is established and means for selecting and establishing said second protocol means if said data link connection according to said first protocol cannot be established.

Claim 14

A network interfacing apparatus for interfacing at least one unit of terminal equipment to a switched network having at least one channel for transferring information including data to and from a remote system in accordance with any one of at least two predefined protocols, said apparatus comprising: communication means for transmitting and receiving units of information via said channel; at least two protocol system means, one for each of said predefined protocols, for enabling said apparatus to communicate via said channel with said remote system according to any one of said predefined protocols; controller means for controlling said communication means, said controller means including means for selecting a first protocol system means to attempt to establish a data link connection between said apparatus and said remote system according to said first protocol, and means for selecting and enabling said first protocol system means if said data link connection is established and means for selecting and establishing said second protocol means if said data link connection according to said first protocol cannot be established.

Claim 15

A network interfacing apparatus for interfacing at least one unit of terminal equipment to a switched network having at least one channel for transferring information including data to and from a remote system in accordance with one of a plurality of predefined protocols, said apparatus comprising: communication means for transmitting and receiving units of information via said channel, at least a first protocol system means for enabling said apparatus to communicate via said channel with said remote system according to a first protocol of said predefined protocols; at least a second protocol system means for enabling said apparatus to communicate via said channel with said remote system according to a second protocol of said predefined protocols; controller means for controlling said communication means, said controller means including means for selecting said first protocol system means to attempt to establish a data link connection via said channel between said apparatus and said remote system according to said first protocol, and means for selecting and enabling said first protocol system means to enable said apparatus to communicate via said channel with said remote system if said data link connection is established; and means for selecting said second protocol means if said data link connection according to said first protocol cannot be established to attempt to establish a data link connection between said apparatus and said remote system according to said second protocol, means for waiting for a predefined time period for said data link connection according to said second protocol to be established and means for selecting and enabling said second protocol system means to enable said apparatus to communicate with said remote system if said data link connection is established.

Claim 16

A network interfacing apparatus for interfacing at least one unit of terminal equipment to a switched network having at least one channel for transferring information including data to and from a remote system in accordance with one of a plurality of predefined protocols, said apparatus comprising: communication means for transmitting and receiving units of information via said channel, at least a first protocol system means for enabling said apparatus to communicate via said channel with said remote system according to a first protocol of said predefined protocols; at least a second protocol system means for enabling said apparatus to communicate via said channel with said remote system according to a second protocol of said predefined protocols; controller means for controlling said communication means, said controller means including means for selecting said first protocol system means to attempt to establish a data link connection via said channel between said apparatus and said remote system according to said first protocol, and means for selecting and enabling said first protocol system means to enable said apparatus to communicate via said channel with said remote system if said data link connection is established; and means for selecting said second protocol means if said data link connection according to said first protocol cannot be established to attempt to establish a data link connection between said apparatus and said remote system according to said second protocol, means for waiting for a predefined time period for said data link connection according to said second protocol to be established and means for selecting and enabling said second protocol system means to enable said apparatus to communicate with said remote system if said data link connection is established.

Claim 21

A network interfacing apparatus for interfacing at least one unit of terminal equipment to a switched network having at least one channel for receiving information including data from a remote site in accordance with either one of at least two distinct and predefined protocols, wherein each of said predefined protocols is identified by at least one predefined characteristic data value uniquely positioned within a predetermined sequence of values within a unit of information, said apparatus comprising: a receiver adapted for receiving at least one unit of information from said channel; at least two protocol system, one for each of said predefined protocols, adapted for enabling said apparatus to communicate over said channel with said remote site according to a select one of said predefined protocols; a comparing element adapted for respectively comparing at least one characteristic data value of said at least one unit of information received by said receiver with at least one predefined characteristic data value used to identify said predefined protocols so as to identify the predefined protocol of the unit of information received by said receiver; and a protocol selector adapted for selecting and enabling the appropriate one of said protocol systems in response to a match between the at least one characteristic data value of said at least one unit of information and the at least one predefined characteristic data value used to identify said protocol, so as to permit said apparatus to communicate over said channel with the remote site according to the selected one of said predefined protocols.

Claim 22

A network interfacing apparatus for interfacing at least one unit of terminal equipment to a switched network having at least one channel for receiving information including data from a remote site in accordance with either one of at least two distinct and predefined protocols, wherein each of said predefined protocols is identified by at least one predefined characteristic data value uniquely positioned within a predetermined sequence of values within a unit of information, said apparatus comprising: a receiver adapted for receiving at least one unit of information from said channel; at least two protocol system, one for each of said predefined protocols, adapted for enabling said apparatus to communicate over said channel with said remote site according to a select one of said predefined protocols; a comparing element adapted for respectively comparing at least one characteristic data value of said at least one unit of information received by said receiver with at least one predefined characteristic data value used to identify said predefined protocols so as to identify the predefined protocol of the unit of information received by said receiver; and a protocol selector adapted for selecting and enabling the appropriate one of said protocol systems in response to a match between the at least one characteristic data value of said at least one unit of information and the at least one predefined characteristic data value used to identify said protocol, so as to permit said apparatus to communicate over said channel with the remote site according to the selected one of said predefined protocols.

Claim 23

A network interfacing apparatus according to claim 15, further comprising at least a third protocol system adapted for enabling said apparatus to communicate over said channel with said remote site according to a third protocol of said predefined of protocols.

Claim 24

A network interfacing apparatus according to claim 15, further comprising: at least a third protocol system adapted for enabling said apparatus to communicate over said channel with said remote site according to a third protocol of said predefined of protocols; and wherein said protocol selector is adapted for selecting and enabling the third protocol system in response to a match between the at least one characteristic data value of said at least one unit of information and the at least one predefined characteristic data value used to identify said predefined protocol, so as to permit said apparatus to communicate over said channel with the remote site according to the selected one of said predefined protocols.

Claim 25

A network apparatus according to claim 15, wherein each of said predefined protocols is a data link protocol for the transfer of data across a switched network.

Claim 26

A network apparatus according to claim 15, wherein each of said predefined protocols is a data link protocol for the transfer of data across an ISDN network.

Claim 27

A network apparatus according to claim 15, wherein said at least one characteristic data value includes at least one data field value in said at least one unit of information and wherein said comparing element is adapted for comparing said data field value with a predefined corresponding value appropriate for at least one of said predefined protocols.

Claim 28

A network apparatus according to claim 15, further comprising at least a third protocol system adapted for enabling said apparatus to communicate over said channel with said remote site according to a third protocol of said predefined of protocols; and a default protocol selector adapted for selecting and enabling the third protocol system corresponding to the one of said predefined protocols when said comparing element is unable to match any of the at least one data value of said at least one unit of information with at least one predefined characteristic data value used to identify said predefined protocols so as to identify the predefined protocol of the unit of information received by the receiver.

Claim 29

A network interfacing apparatus for interfacing at least one unit of terminal equipment to a switched network having at least one channel for transferring information including data to and from a remote system in accordance with any one of at least two predefined protocols, said apparatus comprising: a network interface adapted for transmitting and receiving units of information via said channel; at least two protocol systems, one for each of said predefined protocols, adapted for enabling said apparatus to communicate via said channel with said remote system according to any one of said predefined protocols; and a system controller adapted for controlling said network interface, for selecting a first protocol system to attempt to establish a data link connection via said channel between said apparatus and said remote system according to said first protocol, and for selecting and enabling said first protocol system if said data link connection via said channel is established and for selecting and establishing said second protocol system if said data link connection via said channel according to said first protocol cannot be established.

Claim 30

A network interfacing apparatus for interfacing at least one unit of terminal equipment to a switched network having at least one channel for transferring information including data to and from a remote system in accordance with any one of at least two predefined protocols, said apparatus comprising: a network interface adapted for transmitting and receiving units of information via said channel; at least two protocol systems, one for each of said predefined protocols, adapted for enabling said apparatus to communicate via said channel with said remote system according to any one of said predefined protocols; and a system controller adapted for controlling said network interface, for selecting a first protocol system to attempt to establish a data link connection via said channel between said apparatus and said remote system according to said first protocol, and for selecting and enabling said first protocol system if said data link connection via said channel is established and for selecting and establishing said second protocol system if said data link connection via said channel according to said first protocol cannot be established.

Claim 31

A network interfacing apparatus for interfacing at least one unit of terminal equipment to a switched network having at least one channel for transferring information including data to and from a remote system in accordance with one of a plurality of predefined protocols, said apparatus comprising: a network interface adapted for transmitting and receiving units of information via said channel, at least a first protocol system adapted for enabling said apparatus to communicate via said channel with said remote system according to a first protocol of said predefined protocols; at least a second protocol system adapted for enabling said apparatus to communicate via said channel with said remote system according to a second protocol of said predefined protocols; a system controller adapted for controlling said network interface, for selecting said first protocol system to attempt to establish a data link connection between said apparatus and said remote system according to said first protocol, for waiting for a predefined time period for said data link connection according to said first protocol to be established and for selecting and enabling said first protocol system means to enable said apparatus to communicate via said channel with said remote system if said data link connection is established; and for selecting said second protocol system if said data link connection via said channel according to said first protocol cannot be established to attempt to establish a data link connection between said apparatus and said remote system according to said second protocol, for waiting for a predefined time period for said data link connection according to said second protocol to be established and for selecting and enabling said second protocol system to enable said apparatus to communicate via said channel with said remote system if said data link connection is established.

Claim 32

A network interfacing apparatus for interfacing at least one unit of terminal equipment to a switched network having at least one channel for transferring information including data to and from a remote system in accordance with one of a plurality of predefined protocols, said apparatus comprising: a network interface adapted for transmitting and receiving units of information via said channel, at least a first protocol system adapted for enabling said apparatus to communicate via said channel with said remote system according to a first protocol of said predefined protocols; at least a second protocol system adapted for enabling said apparatus to communicate via said channel with said remote system according to a second protocol of said predefined protocols; a system controller adapted for controlling said network interface, for selecting said first protocol system to attempt to establish a data link connection between said apparatus and said remote system according to said first protocol, for waiting for a predefined time period for said data link connection according to said first protocol to be established and for selecting and enabling said first protocol system means to enable said apparatus to communicate via said channel with said remote system if said data link connection is established; and for selecting said second protocol system if said data link connection via said channel according to said first protocol cannot be established to attempt to establish a data link connection between said apparatus and said remote system according to said second protocol, for waiting for a predefined time period for said data link connection according to said second protocol to be established and for selecting and enabling said second protocol system to enable said apparatus to communicate via said channel with said remote system if said data link connection is established.