Background Information
This section describes two common networking scenarios for evolving GPON to 10G GPON. You can select either of them based on the actual networking and service requirements.Networking Scenario I — Pure 10G GPON Network
DescriptionA pure 10G GPON network contains only 10G GPON devices, including 10G GPON service board, 10G GPON optical network units (ONUs), and an optical distribution network (ODN). This scenario applies to a new 10G GPON FTTB or FTTC network. FTTB is the acronym for fiber to the building and FTTC is the acronym for fiber to the curb.
Network Diagram
Figure 1 shows a pure 10G GPON network.
Characteristics
- Advantage: Only one type of network element (NE) (10G GPON devices) is involved, and the maintenance is easy.
- Disadvantage: A new ODN is required.
On a hybrid 10G GPON and GPON network, an OLT(MA5680T) uses 10G GPON and GPON boards
to receive services. 10G GPON and GPON NEs share an ODN but use different
service wavelengths. Therefore, a passive wavelength multiplexing device (WDM1r)
is required.
Characteristics
- Advantage: A GPON network is smoothly migrated to a 10G GPON network and the two networks share an ODN.
- Disadvantages:
- A WDM1r device is required on the ODN to multiplex wavelengths. This operation requires reconstruction for existing ODN networks and optical fiber connections, which interrupts services.
- Various types of NEs (10G GPON and GPON devices) are involved, and the maintenance is complicated.
10G GPON ONUs are compatible with GPON ONUs. During the usage, pay
attention to the following points:
- On OLTs, 10G GPON access board support only 10G GPON ONUs.
- On OLTs, GPON access board support only GPON ONUs.
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