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NTU Optical Network Terminals
17
3
ARCHITECTURE OF DEVICES
3.1
NTU-RG architecture
Figure 8 – Logical Architecture of a Device with Factory Settings
Main Components of the Device:
–
optical receiver/transmitter (SFF module)
for conversion of an optical signal into electric one
–
processor (PON chip)
which converts Ethernet and GPON interfaces
;
and
–
Wi-Fi modules
for wireless interfaces of the device.
A device with factory (initial) settings have the following logical blocks (see Figure 8):
Br1;
Voice (IP telephony);
eth0…3;
FXS0;
wl0, wl0.1..wl0.3, wl1, wl1.1..wl1.3;
ppp0.1;
IPInterface.
The
br1 block
here is used to combine LAN ports into a single group.
The
eth0..3 blocks
physically represent Ethernet ports with RJ-45 connector for connection of PC, STB,
and other network devices. They are logically included into the
br1
block.
The
FXS0 block
is a port with RJ-11 connectors for connection of analogue phone. It is logically included
into the Voice block. The Voice block can be controlled through web interface or remotely with ACS server via
TR-069 standard. The block specifies VoIP service parameters (SIP server address, phone number, VAS, etc.).
The
wl0, wl0.1…wl1.3
blocks are the Wi-Fi module connection interfaces. wl0 blocks are the interfaces
designed for 2.4GHz band operation and wl1 blocks are designed for 5GHz band operation.
Filter
and
Marking
blocks enable inclusion of local interfaces into a single group (to
br1
block). They deal
with the traffic transmission rules,
Filter
blocks are responsible for the incoming traffic on the interface,
Marking
blocks—for the outgoing one.
