Alarm mechanism
First Claim
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1. A method for monitoring alarm conditions, the method comprising:
- receiving an indication of a change in state of an alarm;
recording the change in state of the alarm in a first register;
recording the current state of the changed alarm in a second register;
generating an interrupt;
wherein receiving an indication of a change in state of an alarm comprises receiving an indication of an alarm condition when at least two cells are received on communication line with corrupted synchronization patterns.
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Abstract
An alarm mechanism is provided. The alarm mechanism includes a hardware component and a software component. The hardware component includes first and second registers. The first register is adapted to store a value that indicates a change in state of at least one alarm and the second register is adapted to store current states of each of the at least one alarm. The software component is responsive to interrupt requests from the hardware component and is adapted to read the first and second registers.
14 Citations
17 Claims
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1. A method for monitoring alarm conditions, the method comprising:
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receiving an indication of a change in state of an alarm;
recording the change in state of the alarm in a first register;
recording the current state of the changed alarm in a second register;
generating an interrupt;
wherein receiving an indication of a change in state of an alarm comprises receiving an indication of an alarm condition when at least two cells are received on communication line with corrupted synchronization patterns.
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2. A telecommunications system, comprising:
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at least one access device having a plurality of ports adapted to couple to a plurality of subscriber lines;
a plurality of line cards disposed in the at least one access device and providing the plurality of ports;
a monitoring circuit disposed in the access device, the monitoring circuit adapted to monitor for alarm conditions for the at least one access device; and
an alarm mechanism, communicatively coupled to the monitoring circuit, the alarm mechanism including;
a hardware component, including first and second registers, the first register adapted to store a value that indicates a change in state of at least one alarm and the second register adapted to store current states of each of the at least one alarm, and a software component, responsive to interrupt requests from the hardware component, adapted to read the first and second registers. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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10. An alarm mechanism for a telecommunications access device, comprising:
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at least one alarm associated with each of a plurality of serial low voltage differential signal (LVDS) lines of the access device;
a first n-bit register, responsive to the at least one alarm and adapted to store a value that indicates a change in state of the at least one alarm;
a second n-bit register, responsive to the at least one alarm, and adapted to store current states of each of the at least one alarm; and
wherein corresponding bits of the first and second n-bit registers are associated with a corresponding alarm and a corresponding LVDS line. - View Dependent Claims (11, 12)
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13. A method for monitoring alarm conditions in an access device, the method comprising:
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monitoring a plurality of serial lines on a back plane of the access device;
when successive cells have corrupted synchronization patterns, generating an alarm;
receiving the alarm;
recording a change in state of an alarm in a first n-bit register;
recording the current state of the changed alarm in a second n-bit register; and
generating an interrupt for a software component to read the first and second n-bit registers. - View Dependent Claims (14, 15, 16, 17)
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Specification