Method system and device for line monitoring
First Claim
1. Method for line monitoring in a system comprisingan integrated services digital network (ISDN);
- a master terminal (MASTER), which is connected to a place of reception (PR) of a response and to the integrated services digital network (ISDN); and
a slave terminal (SLAVE), which is connected to an object being monitored (OM) and to the integrated services digital network (ISDN), wherein the method comprises the steps of;
starting a first call setup of a control call from the master terminal (MASTER) to the slave terminal (SLAVE);
identifying by means of the slave terminal (SLAVE) the control call originated by the master terminal (MASTER) on the basis of a predetermined ringing procedure before answering the control call;
terminating the first call setup procedure;
starting a second call setup of an acknowledgement call from the slave terminal (SLAVE) to the master terminal (MASTER) upon lapse of a suitable length of time after the control call;
identifying by means of the master terminal (MASTER) the acknowledgment call originated by the salve terminal (SLAVE) on the basis of a predetermined ringing procedure before answering the acknowledgement call; and
terminating the second call setup procedure.
1 Assignment
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Accused Products
Abstract
A method, a system and a master terminal for line monitoring in system comprising a telephone network (ISDN), a master terminal (MASTER) connected to a place of reception (PR) of a response and to the telephone network (ISDN), and a slave terminal (SLAVE) connected to an object being monitored (OM) and to the telephone network (ISDN). The setup of a control call from the master terminal (MASTER) to the slave terminal (SLAVE) is started, the control call originated by the master terminal (MASTER) is identified by the slave terminal (SLAVE) on the basis of a predetermined ringing procedure before answering the call, the call setup procedure is terminated, the setup of an acknowledgment call from the slave terminal (SLAVE) to the master terminal (MASTER) is started upon the lapse of a suitable length of time after the control call, the acknowledgment call received from the slave terminal (SLAVE) is identified by the master terminal (MASTER) on the basis of a predetermined ringing procedure before answering the call, and the call setup procedure is terminated.
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Citations
20 Claims
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1. Method for line monitoring in a system comprising
an integrated services digital network (ISDN); -
a master terminal (MASTER), which is connected to a place of reception (PR) of a response and to the integrated services digital network (ISDN); and
a slave terminal (SLAVE), which is connected to an object being monitored (OM) and to the integrated services digital network (ISDN), wherein the method comprises the steps of;
starting a first call setup of a control call from the master terminal (MASTER) to the slave terminal (SLAVE);
identifying by means of the slave terminal (SLAVE) the control call originated by the master terminal (MASTER) on the basis of a predetermined ringing procedure before answering the control call;
terminating the first call setup procedure;
starting a second call setup of an acknowledgement call from the slave terminal (SLAVE) to the master terminal (MASTER) upon lapse of a suitable length of time after the control call;
identifying by means of the master terminal (MASTER) the acknowledgment call originated by the salve terminal (SLAVE) on the basis of a predetermined ringing procedure before answering the acknowledgement call; and
terminating the second call setup procedure. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. Line monitoring system, comprising
an integrated services digital network (ISDN); -
a master terminal (MASTER connected to a place of reception (PR) of a response and to the integrated services network (ISDN); and
at least one slave terminal (SLAVE) connected to an object being monitored (OM) and to the integrated services network (ISDN), wherein the slave terminal (SLAVE) comprises means for identifying a control call originated by the master terminal (MASTER) before answering the control call;
the slave terminal (SLAVE) comprises means for starting the setup of an acknowledgement call from the slave terminal (SLAVE) to the master terminal (MASTER) upon the lapse of a suitable length of time after the control call; and
the master terminal (MASTER) comprises means for identifying the acknowledgement call originated by the slave terminal (SLAVE) before answering the acknowledgement call; and
the master terminal (MASTER) comprises means for executing an alarm function when a ringing procedure deviates from a predetermined procedure. - View Dependent Claims (9)
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10. Master terminal for a monitoring system, comprising:
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a network termination unit (NT1) fitted for connection to an integrated services digital network (ISDN) via a U-interface;
a terminal adapter (TA1) connected to the network termination unit (NT1) via an S-interface; and
an element (RS1) connecting the terminal adapter (TA1) to a place of reception (PR) of a response, wherein the master terminal (MASTER) comprises, means for establishing a control call to a slave terminal (SLAVE);
means for terminating the control call before the control call has been set up;
means for identifying an acknowledgement call originated by the slave terminal (SLAVE) and for leaving the acknowledgement call unanswered; and
means for executing an alarm function when a ringing procedure deviates from a predetermined procedure. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. Slave terminal for a monitoring system, comprising:
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a network termination unit (NT2) fitted to be connected to an integrated services digital network (ISDN) via a U-interface;
a terminal adapter (TA2) connected to the network termination unit (NT2) via an S-interface; and
an element (RS2) connecting the terminal adapter (TA2) to an object being monitored wherein, the slave terminal (SLAVE) comprises, means for identifying a control call originated by a master terminal (MASTER) and for leaving the control call unanswered; and
means for establishing an acknowledgement call to the master terminal (MASTER) in a predetermined manner. - View Dependent Claims (18, 19, 20)
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Specification