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NTU Optical Network Terminals 27
Fig. 16—Architecture of the Device Configured for Triple Play Model 1 Services
The blocks created by the OMCI protocol during connection to OLT (left) are shown for clarity and do not
describe the real architecture.
The gemport blocks represent logical terminals of gem ports that are used for transmitting traffic of
various services.
The GEM4094 block is a logical terminal of the GEM port used for multicasting. It multicasts traffic
downstream. WANConnectionDevice receives the multicast traffic from this block and sends it further to Bri
interfaces based on the table of IGMP groups.
The bronu0,9 blocks are MAC bridge service profiles (recommendation G.988).
The TR-069 client block is used for device remote control with the help of the ACS server (Auto
Configuration Server) via TR-069 protocol. The block is used to establish communication between ACS and
subscriber’s equipment, process ONT queries, and configure services.
The WANConnectionDevice block is an object associated with WAN interface. It is an interim interface
between the OMCI and RG parts of the device.
The veip 0.n blocks are WAN interfaces of the device’s router; each of the interfaces is used to provide a
certain type of services. In this example:
– veip0.1 is for the Internet;
– veip0.2 controls the multicast traffic;
– veip0.3 provides VoD and IPTV on STB.
These WAN interfaces have the following operation modes:
– PPPoE—starts PPP client;
– IPoE DHCP—starts DHCP client;
– IPoE Static—uses a static address;
– Bridging—operates in the bridge mode.
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