Telekom Malaysia Berhad

Zulhedry Abdul Manaf

Asmahanim Bte Ahmad

Ummi Supya Binti Ismail

Drees Andriyanto

Muhammad Zamzuri Bin

Mohd Shahril Bin Salleh

Dress Andriyanto M Ssi

Dedy Tarsono

This disclosure describes a wavelength division multiplexing passive optical network system () comprising an optical line terminal () for controlling transmission of data that are carried by optical signals across the optical network system along an upstream or downstream path; a signal modulating loop circuit including a circulator () connected to the optical line terminal () for determining the transmission paths of the optical signals; a splitter () connected to the circulator () for splitting the optical signals into a first portion of optical signals and a second portion of optical signals according to a predetermined ratio; an amplifier () connected to the splitter () for amplifying the second portion of optical signals; and a modulator () connected in between the amplifier () and the splitter () for modulating the amplified second portion of optical signals to be transmitted to the circulator (); a converter () connected to the splitter () for converting the first portion of optical signals into electrical signals; and one or more optical network units () connected in between the converter () and modulator () for receiving the electrical signals from the converter (), and transmitting electrical signals to the modulator () for converting the electrical signals into optical signals to be transmitted together with the amplified second portion of optical signals to the optical line terminal (); wherein the circulator () directs the optical signals received from the modulator () to the splitter () for being transmitted back into the signal modulating loop circuit and/or towards the optical network units along the downstream path, or towards the optical line terminal along the upstream path.

Wavelength division multiplexing passive optical network system

The present invention provides an improved optical communication network () that utilizes an apparatus of optical channel protection. The apparatus for optical channel protection of the present invention including a transmitting end network switch (), a first and a second receiving end network switch (), a plurality of wavelength tuneable transmitting end transponders (), a plurality of wavelength tuneable receiving end transponders ('), a transmitting end controller () connected to a network monitoring and control system () and a receiving end controller () connected to said network monitoring and control system (). The present invention utilizes a method of optical channel protection that can be broadly categorized under optical multiplex switching.

Broadband optical communication network having optical channel protection apparatus

Growing community of inventors

Bangi, Malaysia

Zulhedry Abdul Manaf