POTU is developed by Visint^® to solve the problem of limited optical ratio and transmission distance in the transmission of PON system. It applies OEO mode to amplify and shape the signal. At the same time, it uses downlink signal to extract clock and re-timing the signal, realizes signal 3R amplification, effectively enlarges the optical power of PON line, and solves the transmission distance problem. It is widely used in the fields of transmission remote, EPON cell access, optical fiber access and so on.

• Maximum remote distance: EPON/40KM, GPON/60KM.

• Supporting wavelength conversion of PON signal and realizes WDM function.

• Supporting optical power amplification and services transparent transmission of EPON and GPON.

• Supporting IEEE802.3ah, ITU-T G.984.X and national standards (YD/T 1475-2006).

• Supporting 3R (Re-amplifying, Re-shaping, Re-timing) and multi-level cascading of PON signals.

• Single board supports independent 4 channels bidirectional PON signal telescoping or 4 channels independent bidirectional PON signal wavelength conversion.

• Supporting SNMP-based unified network management platform, network management mode CLI, WEB, NetRiver (graphical interface). 

Application 1: Multiplex PON Service Transmission on One-core Optical Fiber 

In the user-intensive area, the PON aggregation remote device is added between the OLT and the ODN, and the WDM technology is used to realize the transmission of multiple PON services on the one-core optical fiber, which greatly improves the transmission efficiency, significantly saves the optical fiber resources, and realizes extensive coverage of the PON.

Figure 1: Aggregation and Remote Integration of WDM Technology for Point-to-Point

Multi-channel PON Services

The PON aggregation and remote is combined with the WDM technology group ring, and centralized deployment by the OLT reduces fiber consumption, prolongs the transmission distance, and utilizes WDM electrical layer/optical layer protection to improve the reliability of the transmission line.

Figure 2: PON Aggregation and Remote Integration of WDM Technology into Ring Protection

Loading Multi-channel PON Service

Application 2: Single-path PON Amplifying Remote

In fewer users' remote areas, PON aggregation is added to the optical fiber link between OLT and ONT, and the service coverage is realized by pulling out the single-way PON.

Figure 3: PON Remote Amplifier Located in the Application Architecture between OLT and ODN

The RE is deployed between the splitter and the ONU for extension and expansion of the branch. When the ODN coverage changes, the PON aggregation extension can be used to extend the transmission distance and the split ratio. New buildings with low real occupancy can be hung up to existing ODNs, making network deployment more flexible and convenient.

Figure 4: PON Remote Amplifier Located in the Application Architecture between ODN and ODN