OLT LTP-16N, LTP-16NT. User Manual
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5.1.3.2 N-to-1
Consider an example of N-to-1 implementation. It is better to consider this scheme on the example of two
ONTs.
The chart of this service model is shown in the following figure.
Figure 18 – Service Model 2 chart
Dedicated S-VLANs are used between the OLT and service routers (BRAS, VoIP SR) for each of the following
services (here – Internet). The destination of the packet is defined by the MAC table, which explicitly stores the
MAC address and GEM port correspondence. If no entry is found, the packet is sent to the broadcast GEM port
and replicated to all ONTs using the service.
5.1.3.3 Multicast
The multicast scheme is similar to the N-to-1 scheme, except that a multicast GEM port is used and the MAC
table is involved only for IGMP exchange. Multicast is sent directly to the multicast GEM port. This mechanism
is closely related to IGMP snooping.
5.1.4 ONT licensing
5.1.5 Introduction
By default, OLT supports only Eltex ONTs operation. To enable any third-party ONTs, OLT requires a license. To
purchase the license, contact Eltex Marketing Department.
