RFOG is not only a patented technology of CommScope, but also a new standard formulated by the American Cable Communications Industry Association. It is used to define a PON network architecture, which can transmit voice, video and DOCSIS-based data on optical fibers. The RFOG standard can continue to retain existing front-end equipment, digital set-top boxes, Docsis cable modems, and emerging multimedia terminal adapters (E-MTA). Users only need to install a photoelectric converter to watch high-definition and other programs. RFOG can not only allow operators to build FTTP networks in new residential areas and commercial and residential buildings, but also provide upgrade services for existing HFC users. However, RFOG will not bring a breakthrough in bandwidth.
The key point of RFOG is the reverse laser control circuit, and its reverse laser adopts burst mode. The switching of the reverse laser is controlled by detecting the CM signaling.
RFoG Common Networking Modes
1. The single-fiber PON structure is adopted, which greatly reduces the complexity of the network, and at the same time
Active devices in the network are also reduced. Improves the reliability of the network and reduces the network
cost.
2. Adopt dual-fiber bidirectional topology
3. Using wavelength division multiplexing, combining EPON and CMTS+CM in a passive optical network
accomplish. Thereby reducing duplication of investment.
Advantages of RFoG networking:
1. Reduce the cost of networking
From the above network topology diagram, we can see that the number of equipment and optical fibers is greatly reduced by using RFOG equipment to form a network. Therefore, the cost is also greatly reduced.
2. Simplify the network structure, thereby improving the reliability of the network.
3. Convenient network upgrade.
4. Reduce network noise, thereby improving network quality.
Since the RFOG optical contact reverse laser adopts the burst mode, the switch of the laser is controlled by the CM signaling, and the CM reverse signal adopts the TDMA mode, so for the optical nodes in a PON structure network, Only one reverse laser is active at any time. In this way, there is no pooling noise for the network.
5. Facilitate the refinement of optical nodes.
