Hello everyone!
Today, let's learn about the XG(S) PON solution and typical networking.
XG(S)-PON Solution and Typical Networking
FTTx Networking
The XG(S)-PON complies with the P2MP network architecture of the PON network. Similar to the GPON, the XG(S)-PON can be applied to the FTTx networking scenario.
FTTH（Fiber To The Home）
FTTC（Fiber To The Curb）
FTTB（Fiber To The Building）
FTTO（Fiber To The Office）
FTTM（Fiber To The Mobility Base Station）
FTTD（Fiber To The Door）
XG(S) – PON Enterprise Networking
Evolution from GPON to XG(S)-PON
XG(S)-PON and GPON Can Share an ODN
The upstream and downstream wavelengths of XG(S)-PON do not overlap with those of GPON. Therefore, XG(S)-PON and GPON can share an ODN network through wavelength division multiplexing (WDM).
Overview of Smooth Evolution from GPON to XG(S)-PON
Reuse the OLT platform and upgrade the OLT accordingly.
The OLT supports the hybrid use of GPON boards and XG(S)-PON boards.
Upgrade the OLT software to a version that supports XG(S)-PON
Reuse the NMS.
Upgrade the NMS software to a version that supports XG(S)-PON reuse ODN
GPON and XG(S)-PON wavelengths do not overlap and can share an ODN
Different evolution modes slightly change the ODN. For details, see the specific evolution solution.
GPON ONU and XG(S)-PON ONU
XG(S)-PON ONUs can be added or GPON ONUs can be gradually replaced.
Smooth Evolution from GPON to XG(S)-PON
In the GPON FTTx network, the OLT uses the GPON service board to access the GPON ONU before evolution. The following describes several solutions for evolution from GPON to XG(S)-PON.
Evolution Solution 1 Adding WDM1r Multiplexers
Evolution Solution 1: Add WDM1r multiplexers. The WDM1r is configured to perform wavelength division multiplexing on a GPON wavelength and an XG(S)-PON wavelength, so as to transmit the GPON wavelength and the XG(S)-PON wavelength on the same ODN network.
1. Add an XG(S)-PON service board to the OLT. (If the OLT slot on the live network supports only 10 Gbit/s switching capacity and cannot meet the forwarding requirements of the XG(S)-PON service board, replace the control board.)
2. Add an external WDM1r multiplexer. (Note: The insertion loss of the WDM1r multiplexer increases by about 1.5 dB. You need to adjust the insertion loss to avoid this issue.)
Cutover the backbone fiber of the GPON port to the WDM1r multiplexer,
The XG(S)-PON port is also connected to the WDM1r multiplexer,
The WDM1r multiplexes the GPON wavelength and XG(S)-PON wavelength and transmits them to the ODN.
Add XG(S)-PON ONUs or GPON ONUs on the live network.
After all ONUs on the live network are switched to XG(S)-PON ONUs, remove the WDM1r multiplexer and connect the ODN to the XG(S)-PON port.
Evolution Solution 1 - Removing the WDMI1r Multiplexer
After all ONUs on the live network are switched to XG(S)-PON ONUs, remove the WDM1r multiplexer and connect the ODN to the XG(S)-PON port.
Evolution Solution 2 - Using GPON & XG(S) - PON Combo Boards
Evolution solution 2 – GPON&XG(S)-PON combo board. This solution can implement ODN multiplexing without adding external WDM1r devices.
A user adds a GPON&XG(S)-PON combo service board to an OLT. (If the OLT slot on the live network supports only 10 Gbit/s switching capacity and cannot meet the forwarding requirements of the XG(S)-PON service board, replace the control board.)
Cutover the backbone optical fiber of the GPON port to the combo board.
Add XG(S)-PON ONUs or replace GPON ONUs on the live network.
Evolution Solution 2 - Using GPON & XG(S) - PON Combo Boards
The GPON&XG(S)-PON combo board has a built-in WDM1r module, which can implement smooth evolution without adding an external WDM1r multiplexer.
Evolution from GPON to XG(S) - PON Combo Solution
The three-in-one optical module integrates the GPON SFP optical module, XG(S)-PON SFP+ optical module, and WDM1r optical module to form a combo XFP optical module.
Using the three-in-one optical module can implement the smooth evolution from GPON to XG(S)-PON without changing the original ODN network and adding the external WDM1r multiplexer.
The combo PON optical module supports 1310 nm and 1270 nm receive wavelengths.
The transmit wavelength can be 1490 nm or 1577 nm.
Thanks for reading!
