摘要:
A network node determines the suitability of coupled devices for being remotely line powered before actually powering them. The node scan its ports to determine which ports are coupled to devices. The node then interrogates the coupled devices. A unique discovery tone or bit pattern is generated and sent to devices coupled to ports. The node then monitors the port for a return signal. If there is a return signal, it is compared to the transmitted discovery signal. The signal will be identical after allowing for line losses if the coupled device is suitable for remote line powering. If the comparison yields a match, the network node supplies remote line power to the device.
摘要:
A network node determines the suitability of coupled devices for being remotely line powered before actually powering them. The node scan its ports to determine which ports are coupled to devices. The node then interrogates the coupled devices. A unique discovery tone or bit pattern is generated and sent to devices coupled to ports. The node then monitors the port for a return signal. If there is a return signal, it is compared to the transmitted discovery signal. The signal will be identical after allowing for line losses if the coupled device is suitable for remote line powering. If the comparison yields a match, the network node supplies remote line power to the device.
摘要:
A network node determines the suitability of coupled devices for being remotely line powered before actually powering them. The node scan its ports to determine which ports are coupled to devices. The node then interrogates the coupled devices. A unique discovery tone or bit pattern is generated and sent to devices coupled to ports. The node then monitors the port for a return signal. If there is a return signal, it is compared to the transmitted discovery signal. The signal will be identical after allowing for line losses if the coupled device is suitable for remote line powering. If the comparison yields a match, the network node supplies remote line power to the device.
摘要:
A network node determines the suitability of coupled devices for being remotely line powered before actually powering them. The node scan its ports to determine which ports are coupled to devices. The node then interrogates the coupled devices. A unique discovery tone or bit pattern is generated and sent to devices coupled to ports. The node then monitors the port for a return signal. If there is a return signal, it is compared to the transmitted discovery signal. The signal will be identical after allowing for line losses if the coupled device is suitable for remote line powering. If the comparison yields a match, the network node supplies remote line power to the device.
摘要:
A method and apparatus provide an IP telephone or similar device with a mechanism to receive and at least briefly loop back discovery signals received from a telecommunications device such as an Ethernet switch while not permitting the loop back of data packet signals. No mechanical relays are required and the circuitry can be fully integrated on an integrated circuit using commonly available techniques, if desired.
摘要:
A method and apparatus provide an IP telephone or similar device with a mechanism to receive and at least briefly loop back discovery signals received from a telecommunications device such as an Ethernet switch while not permitting the loop back of data packet signals. No mechanical relays are required and the circuitry can be fully integrated on an integrated circuit using commonly available techniques, if desired.
摘要:
An Internet Protocol (IP) telephone operates a communications uplink to a switch based on activity on a separate communications downlink (such as to a personal computer) to conserve power when possible. The IP telephone monitors the communications activity of a link partner on the communications downlink, and when the link partner is present and operating at a relatively high data rate, the IP telephone operates the communications uplink at a correspondingly high data rate to support the communications needs of the IP telephone and the link partner. If the monitoring indicates that the link partner has reduced communications activity (which may include becoming entirely disconnected from the communications downlink), the IP telephone transitions to a second operating condition to operate the communications uplink at a relatively low data rate, with a corresponding decrease in the power required for operation of the communications uplink interface circuitry. By this mechanism, the power required to operate the IP telephony system can be reduced to realize costs savings etc.
摘要:
An Internet Protocol (IP) telephone operates a communications uplink to a switch based on activity on a separate communications downlink (such as to a personal computer) to conserve power when possible. The IP telephone monitors the communications activity of a link partner on the communications downlink, and when the link partner is present and operating at a relatively high data rate, the IP telephone operates the communications uplink at a correspondingly high data rate to support the communications needs of the IP telephone and the link partner. If the monitoring indicates that the link partner has reduced communications activity (which may include becoming entirely disconnected from the communications downlink), the IP telephone transitions to a second operating condition to operate the communications uplink at a relatively low data rate, with a corresponding decrease in the power required for operation of the communications uplink interface circuitry. By this mechanism, the power required to operate the IP telephony system can be reduced to realize costs savings etc.
摘要:
A method and apparatus provide an IP telephone or similar device with a mechanism to receive and at least briefly loop back discovery signals received from a telecommunications device such as an Ethernet switch while not permitting the loop back of data packet signals. No mechanical relays are required and the circuitry can be fully integrated on an integrated circuit using commonly available techniques, if desired.