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72
LTP-8X optical line terminal
19.1
Operating Principle
The "configuration model" concept is used for implementation of different service models of the
terminal. A configuration model defines general principles for data communication channelling for both
OLT and ONT.
— Model 1 is an implementation of the "VLAN for Subscriber" service model. The model does not have
dedicated broadcast GEM ports, and uses U-VLAN on the ONT side.
— Model 2 is an implementation of the "VLAN for Subscriber" service model. The model differs from
model 1 by using a dedicated broadcast GEM port and C-VLAN on the subscriber's side.
— As opposed to the first two models, model 3 is an implementation of the "VLAN for Service" service
model. The model uses a dedicated broadcast GEM port.
Table 19.1. Service Models
VLAN for
Service
VLAN for
Subscriber
Broadcast to
Unicast GEM
Dedicated Broadcast GEM
Model 1
+
+
Model 2
+
+
Model 3
+
+
19.2
Model 1
Consider a model 1 implementation example. The chart of this service model is shown in Fig. 19.3.
Fig. 19.3. Service Model 1 Chart
