Interface for bridging out-of-band information from a downstream communication link to an upstream communication link
First Claim
1. A device for use in a signaling system having a first serial link and a second serial link, the device comprising:
- a first interface to receive first communication via the first serial link;
a second interface to transmit second communication via the second serial link dependent on the first communication; and
circuitry to detect a state change associated with the first serial link;
wherein, the device is to transmit an out-of-band (OOB) signal via the second serial link in response to detection of the state change.
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Accused Products
Abstract
A device includes a first interface to receive a signal from a first communication link, wherein the receive signal includes out-of-band (OOB) information. A detector coupled to the first interface detects the OOB information. An encoder coupled to the detector encodes the OOB information into one or more symbols (e.g., control characters). A second interface is coupled to the encoder and a second communication link (e.g., a serial transport path). The second interface transmits the symbols on the second communication link. The device also includes mechanisms for preventing false presence detection of terminating devices.
47 Citations
25 Claims
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1. A device for use in a signaling system having a first serial link and a second serial link, the device comprising:
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a first interface to receive first communication via the first serial link; a second interface to transmit second communication via the second serial link dependent on the first communication; and circuitry to detect a state change associated with the first serial link; wherein, the device is to transmit an out-of-band (OOB) signal via the second serial link in response to detection of the state change. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An intermediate device for use in a signaling system having first differential serial links and a second differential serial link, the intermediate device comprising:
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a plurality of first interfaces to each receive respective communication from a corresponding first device of a plurality of first devices coupled to the intermediate device, each via a corresponding first differential serial link; a second interface to transmit second communication via the second differential serial link to a second device, the second communication dependent on the communication from the first devices; and circuitry to detect from each one of the first differential serial links occurrence of a state change associated with the corresponding first device; wherein, the intermediate device is to transmit an out-of-band (OOB) signal to the second device via the second differential serial link in response to detection of state change of any one of the first devices. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. An intermediate device for use in a signaling system having first, second, third and fourth unidirectional differential serial links, the intermediate device comprising:
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a first interface having a first receiver to receive first communication from a first device via the first differential serial link and having a second transmitter to transmit third communication to the first device via the third unidirectional differential serial link; a second interface having a first transmitter to transmit second communication to a second device via the second unidirectional differential serial link, the second communication including repeated data symbols from the first communication, the second interface having a second receiver to receive fourth communication from the second device via the fourth unidirectional differential signaling link; wherein the third communication includes repeated data symbols from the fourth communication; circuitry to detect state change associated with the first unidirectional differential serial link; wherein the device is to transmit an out-of-band (OOB) signal via the second unidirectional differential serial link in response to detection of the state change. - View Dependent Claims (24, 25)
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Specification