Hi there!
This time, I will share with you about the application of VPN in GPON by Native TDM.
Definition
By using the standard 8 kHz (125μm) frames, the GPON GTC layer is synchronous in nature. Therefore, GPON can support TDM service. This is called Native TDM.
In Native TDM, TDM frames are encapsulated to ETH frames and then to GPON GEM frames in TDMoETH mode. This model features simple encapsulation, small network cost, and guaranteed link quality.
Purpose
Currently, the circuit-switched network is evolving to the packet-switched network. During the deployment of the packet-switched network, the method to provide traditional circuit switching service over the packet-switched network must be considered. In a GPON network deployment, the traditional TDM service can be delivered over the PSTN network through the Native TDM mode.
Basic Principle
The MA5800 supports E1 upstream transmission mode. The following section uses E1 upstream transmission as an example.
In the TDMoETH mode, the TDM frame is directly encapsulated to the GPON GEM frame so that the TDM service can be transmitted in a GPON network. The following figure shows the basic principle of Native TDM.
Application
The E1 ports of the ONU/ONT access the TDM traffic from the base stations and enterprises. The ONU/ONT sends both the Ethernet traffic and the TDM traffic to the OLT. The OLT differentiates the Ethernet traffic and the TDM traffic, and sends the traffic to the IP network and the SDH network, respectively.
The above contents are from the MA5800 product manual. For more details, please visit the Native TDM. If you can't open this link, please refer to this post to upgrade your permissions: How do we upgrade our account.
Thank you!
