Auto-detection of ISDN BRI services

A method for operating ISDN terminal equipment connected to an ISDN network via an interface having at least two B-channels and one D-channel, the method comprising:

• transmitting an auto-request, for an ISDN transaction that exercises a call hold ISDN supplementary service, to the ISDN network across the D-channel, wherein transmitting an auto-request comprises:
• generating a D-channel call setup request to initiate a first call, using the first B-channel, to a directory number associated with the ISDN terminal equipment;
• answering the first call using the second B-channel;
• and
• generating a D-channel hold request for one of the B-channels;
• receiving an acknowledgment across the D-channel related to the auto-request, wherein the acknowledgment comprises, when the service is available, a hold acknowledgment message from the ISDN network;
• and
• evaluating the acknowledgment to determine whether the auto-request was successful.

A method for operating ISDN terminal equipment connected to an ISDN network via an interface having at least two B-channels and one D-channel, the method comprising:

• transmitting an auto-request, for an ISDN transaction that exercises a call transfer ISDN supplementary service, to the ISDN network across the D-channel, wherein transmitting an auto request comprises:
• generating a D-channel call setup request to initiate a first call, using the first B-channel, to a directory number associated with the ISDN terminal equipment;
• answering the first call using the second B-channel;
• generating a D-channel hold request for one of the B-channels;
• and,
• if the hold is acknowledged, initiating a second call using the B-channel of the hold request to a second directory number associated with the ISDN terminal equipment;
• receiving an acknowledgment across the D-channel related to the auto-request;
• and
• evaluating the acknowledgment to determine whether the auto-request was successful.

A method for operating ISDN terminal equipment connected to an ISDN network via an interface having at least two B-channels and one D-channel, the method comprising:

• transmitting an auto-request, for an ISDN transaction that exercises a call waiting ISDN supplementary service, to the ISDN network across the D-channel, wherein transmitting an auto-request comprises:
• generating a D-channel call setup request to initiate a first call, using the first B-channel, to a first number;
• and,
• initiating a second call using the second B-channel to the originating directory number associated with the first call;
• receiving an acknowledgment across the D-channel related to the auto-request;
• and
• evaluating the acknowledgment to determine whether the auto-request was successful.

A method for operating ISDN terminal equipment connected to an ISDN network via an interface having at least two B-channels and one D-channel, the method comprising:

• transmitting an auto-request, for an ISDN transaction that exercises a call forwarding ISDN supplementary service, to the ISDN network across the D-channel, wherein transmitting an auto-request comprises:
• generating a call forward request to forward calls directed to a first directory number associated with the terminal equipment to a second directory number associated with the terminal equipment;
• and
• placing a call to the first directory number;
• receiving an acknowledgment across the D-channel related to the auto-request;
• and
• evaluating the acknowledgment to determine whether the auto-request was successful.

A method for operating ISDN terminal equipment connected to an ISDN network via an interface having at least two B-channels and one D-channel, the method comprising:

• transmitting an auto-request, for an ISDN transaction that exercises an X.25/D channel packet data feature ISDN supplementary service, to the ISDN network across the D-channel, wherein transmitting an auto-request comprises generating an identity request for an auto-assigned X.25/D channel identity from the ISDN network;
• receiving an acknowledgment across the D-channel related to the auto-request, wherein the acknowledgment comprises, when the service is available, a message from the ISDN network indicating that an X.25 D channel has been assigned;
• and
• evaluating the acknowledgment to determine whether the auto-request was successful.