An air conditioner connection system includes an air conditioner having a first device connected via a power line in a communication-capable manner, and a second device capable of performing radio communication with the air conditioner. The air conditioner includes an authentication process control unit that controls the first device to perform an authentication process when a starting request of the authentication process for performing power carrier communication is received from the second device, the first device includes an authentication process unit that performs the authentication process under the control of the air conditioner, and the second device includes an authentication start process unit that transmits the starting request of the authentication process to the air conditioner.

An air conditioner connection system includes an air conditioner having a first device connected via a power line in a communication-capable manner, and a second device capable of performing radio communication with the air conditioner. The air conditioner includes an authentication process control unit that controls the first device to perform an authentication process when a starting request of the authentication process for performing power carrier communication is received from the second device, the first device includes an authentication process unit that performs the authentication process under the control of the air conditioner, and the second device includes an authentication start process unit that transmits the starting request of the authentication process to the air conditioner.

A support installation includes support members for supporting an electric cable, a tower crane, a mast and a jib linked to an upper portion of the mast. The jib and the mast respectively extend according to a jib direction and a substantially vertical mast direction. The support members are secured to the jib and disposed at a plurality of locations distant according to the jib direction. The support members extend transversally to the jib direction to protrude laterally from the jib. The jib is cantilevered when the support installation is in the service configuration.

A quasi-optical coupling system launches and extracts surface wave communication transmissions from a wire. At millimeter-wave frequencies, where the wavelength is small compared to the macroscopic size of the equipment, the millimeter-wave transmissions can be transported from one place to another and diverted via lenses and reflectors, much like visible light. Transmitters and receivers can be positioned near telephone and power lines and reflectors placed on or near the cables can reflect transmissions onto or off of the cables. The lenses on the transmitters are focused, and the reflectors positioned such that the reflected transmissions are guided waves on the surface of the cables. The reflectors can be polarization sensitive, where one or more of a set of guided wave modes can be reflected off the wire based on the polarization of the guided wave modes and polarization and orientation of the reflector.

A quasi-optical coupling system launches and extracts surface wave communication transmissions from a wire. At millimeter-wave frequencies, where the wavelength is small compared to the macroscopic size of the equipment, the millimeter-wave transmissions can be transported from one place to another and diverted via lenses and reflectors, much like visible light. Transmitters and receivers can be positioned near telephone and power lines and reflectors placed on or near the cables can reflect transmissions onto or off of the cables. The lenses on the transmitters are focused, and the reflectors positioned such that the reflected transmissions are guided waves on the surface of the cables. The reflectors can be polarization sensitive, where one or more of a set of guided wave modes can be reflected off the wire based on the polarization of the guided wave modes and polarization and orientation of the reflector.

A communication connection apparatus controls connection of a communication line between a first and second communication devices comprising: a first connection port for the first communication device, including a first transmission unit through which a signal from the first communication device passes and a first reception unit through which a signal for the first communication device passes; a second connection port for the second communication device, including a second transmission unit through which a signal from the second communication device passes and a second reception unit through which a signal for the second communication device passes; a first connection line connecting the first transmission unit and the second reception unit; and a simulated-signal input unit that inputs a first signal to the first reception unit. On the first signal being input to the first reception unit, the first reception unit and the second transmission unit are physically disconnected.

One or more techniques and/or systems are provided for facilitating a shutdown of output power from an energy panel arrangement to an inverter. A shutdown implementation module is coupled between an energy panel arrangement and an inverter that converts DC power from the energy panel arrangement to AC power for an AC power grid. A communication connection is established, over a power-line communication line, between the shutdown implementation module and a shutdown controller associated with the inverter. Responsive to identifying a loss of the communication connection or receiving a shutdown instruction over the power-line communication line, the shutdown implementation module shuts down output power from the energy panel arrangement to the inverter. The shutdown implementation module may be located within a threshold distance from the energy panel arrangement (e.g., within about 10 feet) so that the output power may be shutoff within a threshold timespan (e.g., within about 10 seconds).

Aspects of the subject disclosure may include, for example, a system that performs operations including detecting a signal degradation of electromagnetic waves guided by a transmission medium, and adjusting at least one phase of signal components of the electromagnetic waves to produce adjusted electromagnetic waves having a hybrid wave mode and a non-optical frequency range to mitigate the signal degradation. Other embodiments are disclosed.

Aspects of the subject disclosure may include, for example, a system that performs operations including detecting a signal degradation of electromagnetic waves guided by a transmission medium, and adjusting at least one phase of signal components of the electromagnetic waves to produce adjusted electromagnetic waves having a hybrid wave mode and a non-optical frequency range to mitigate the signal degradation. Other embodiments are disclosed.

Aspects of the subject disclosure may include, for example, a node device includes an interface configured to receive first signals. A plurality of coupling devices are configured to launch the first signals on a transmission medium as a plurality of first guided electromagnetic waves at corresponding plurality of non-optical carrier frequencies, wherein the plurality of first guided electromagnetic waves are bound to a physical structure of the transmission medium. Other embodiments are disclosed.