4
LUMA X
3/2022
1
Introduction
The LUMA X is an optical modem for fast, reliable wireless underwater communication. Each
LUMA X is a full transceiver and thus capable of half-duplex communication (transmission and
reception).
2
Operation
Note: while submerging the LUMA X, a small number of bubbles may come out of the
pressure compensation vent at the connector end of the modem. When LUMA X is back on
the surface a small amount of water may come out of the vent.
2.1
Initial setup guide
Note: before first operation, the LUMA X needs to be configured.
The following sections describe the initial network setup and LUMA configuration.
On factory default, LUMA X has the default IP address 192.168.102.101, and will send telemetry
to a host computer that has the IP address 192.168.102.100. The first step is thus to set the
host computer to this address for the initial configuration.
For the purpose of initial setup and testing, the default network configuration and IP addresses
are used, as shown in Figure 1. For operational use, the IP addresses of the LUMA X modem and
the computers connected to them can be configured differently to suit individual network
requirements.
Note:
As the LUMA modems form a bridge, they should not be connected to the same cabled
network (i.e. do not plug both modems into the same switch). Doing so may lead to a loop in
the network, where one LUMA picks up traffic from the other LUMA and feeds it back to the
switch, flooding the network with packets. The modems should be connected to two separate
cabled networks as shown below.
Figure 1: Typical initial test setup
