Configuration
devolo G3-PLC Modem 500k
31
The current status of the device is displayed in the
State
column. The
Online
status
means that the device is ready for communication.
The
Timestamp
specifies the time of the most recent PLC network activity for the re-
moved device.
The number of connections to this G3-PLC network is displayed in the
Join count
col-
umn.
A measure of the connection quality is specified under
LQI/Costs
. Here there is a dis-
tinction between the device hardware used:
Modems with a type number of "MT 2638" specify the connection quality as LQI (line
quality indicator). The higher this value is, the better the connection. For example:
Modems with a type number of "MT 2746" or higher specify the connection quality in
terms of costs. The lower this value is, the better the connection. Here the costs are also
displayed between the repeater stages, just like with the path information.
You can find the algorithm for calculating the LQI in ITU-T G.9903, Annex B 'Routing cost'.
Example
: The logical topology is specified in the
Path
column. In the depicted topol-
ogy overview, devices with a node ID of 1 through 5 are connected directly to the PAN
coordinator (= node ID 0). The modem with a node ID of 6 uses the modem with a node
ID of 5 as a repeater.
The costs between modems 0 and 1 are 6. Between modems 2 and 3, the costs are 5.
The topology information is not determined until the menu is opened or the
Refresh
button is pressed. You can open specific topology information by selecting individual
modems and then confirming the selections by pressing the
Refresh
button.
Press the
Invert selection
button to deselect the selected devices and vice versa. This
simplifies operation in many cases.
LQI
SNR/dB
Modulation
0xff/255
53,75
D8PSK
0x80/128
22
D8PSK
0x50/80
10
D8PSK
0x41/65
6,35
DQPSK
0x33/51
2,75
DBPSK
0x23/35
-1,25
ROBO mode
0x00/0
-10
ROBO mode
Summary of Contents for G3-PLC Modem 500k
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