Patent number 371502 has been granted to TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) that is titled PASSIVE OPTICAL NETWORKS AND METHOD OF CONFIGURING TRANSMISSION WAVELENGTHS THEREIN. During the patent prosecution, the patent examiner objected to this patent under section 3(k) of the Indian Patents Act. The patent applicant responded to this objection by stating that a computer-related invention that achieves a technical effect whether by means of hardware or software cannot be regarded as an algorithm. This patent falls under the category of Communication. Overall, this patent covers a method that includes generating and transmitting a first optical signal at different ones of different wavelengths until a second optical signal is received at the first location.