Abstract: A method for auto-tuning an optical transponder that is coupled to an optical terminal comprises: cycling through wavelengths in sequence by, for each wavelength: modulating the wavelength to convey a wavelength identifier of the wavelength, to produce a modulated wavelength that conveys the wavelength identifier; transmitting the modulated wavelength from the optical terminal through an optical demultiplexer that is configured to pass wavelengths to output ports of the optical demultiplexer; waiting to detect a response wavelength, transmitted by the optical transponder, which matches the wavelength; and determining, based on whether the response wavelength is detected, whether to repeat cycling using a next wavelength because the optical transponder is not tuned or to stop cycling because the optical transponder is tuned.

Abstract: A system for and method of generating a notification regarding post office box contents. The system comprises at least one indicator transmitter arranged to generate and transmit a notification signal regarding contents of the post office box responsive to an operator actuation, and at least one receiver/network interface communicatively coupled with the at least one indicator transmitter and arranged to transmit a first signal responsive to receipt of the notification signal from the at least one indicator transmitter. The method comprises generating a notification signal responsive to an operator actuation responsive to a change of the contents of a post office box, and transmitting the generated notification signal to a client device.