Control Circuit for Causing Cyclic Application of Sealing Current for Local Loops Supporting Data Network Telephony
First Claim
Patent Images
1. A system for causing application of sealing current to one or more local telephony loops comprising:
- a current source;
a switching interface for connecting the current source to the one or more telephony loop interfaces; and
a machine-readable instruction accessible to the switching interface, the instruction providing intelligence to the switching interface for identifying the one or more loops to be serviced, the time period for current application to each loop serviced, and a sequence order when more than one loop is serviced.
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Abstract
A system for causing application of sealing current to one or more local telephony loops has a current source; a switching interface for connecting the current source to the one or more telephony loop interfaces; and a machine-readable instruction accessible to the switching interface, the instruction providing intelligence to the switching interface for identifying the one or more loops to be serviced, the time period for current application to each loop serviced, and a sequence order when more than one loop is serviced.
19 Citations
21 Claims
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1. A system for causing application of sealing current to one or more local telephony loops comprising:
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a current source; a switching interface for connecting the current source to the one or more telephony loop interfaces; and a machine-readable instruction accessible to the switching interface, the instruction providing intelligence to the switching interface for identifying the one or more loops to be serviced, the time period for current application to each loop serviced, and a sequence order when more than one loop is serviced. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11)
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10. A method for programming a switching interface to cause sealing current to be applied to one or more telephony loops serviced by a central office switching facility including steps of:
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(a) identifying and listing the one or more loops to be serviced; (b) specifying and recording the time parameters for application of the current to the loops; (c) uploading the instructions of steps (a) and (b) to the switching interface; and (d) activating the switching interface for operation. - View Dependent Claims (12, 13, 14, 16)
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15. The method of step 10 wherein in step (c) the uploaded data is in the form of a machine readable instruction flashed into or programmed into to an integrated circuit on the switching interface.
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17. A method for applying sealing current to a plurality of local telephony loops controlled by a central office switching facility including steps for:
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(a) selecting a first local loop for service; (b) connecting the local loop to a current source; (c) maintaining the connection for a pre-defined period of time; (d) selecting a subsequent local loop for service; (e) switching the connection to the subsequent local loop; and (f) repeat steps (c), (d), and (e) in sequence until all of the loops of the plurality are serviced. - View Dependent Claims (18, 19, 20, 21)
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Specification