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RUGGEDCOM RS920W
Installation Guide
Section 3.3.3
EoVDSL Performance
The EoVDSL ports can be configured to operate in one of two modes: Auto Mode (default) and Manual Mode. In
Auto Mode, the device will step through the different speeds and automatically select the best bit-rate based on
the current line conditions. In Manual Mode, the user can select one of the speed settings and the device will only
attempt to attain the set speed. If the line conditions degrade (reducing the SNR or Signal to Noise Ratio), but the
device is able to maintain the link, an alarm will be triggered to notify the user of the reduced SNR. By configuring
the Rescan Mode parameter in ROS, the user can control at which point the scan process will be restarted
when the line conditions degrade. If Link only is selected, the device will restart the scan process if the line
conditions degrade such that the device is unable to maintain the current link. If Link or SNR is selected, the
device will restart the scan process if either the SNR has dropped below a pre-defined acceptable level or when
the device is unable to maintain the current link, or whichever comes first. Note that if Mode is set to Manual
Mode, the restart of the scan process will only attempt to attain the set speed in Manual Mode.
For information about configuring EoVDSL, refer to the RUGGEDCOM ROS for the RS920W.
NOTE
• EoVDSL ports are designed to be used on private communications lines for point-to-point
connections and are not to be connected to the Public Switched Telephone Network (PSTN).
• To reduce the risk of fire, use only No. 26 AWG or larger telecommunication line cord.
• In Manual Mode, assuming the distance can support the speed setting, the time to port up is typically
15-30 seconds.
On 24 American Wire Gage (AWG) Polyethylene Insulated Cable (PIC) twisted-pair wiring, the following
performance is typical with Universal EoVDSL ports:
Distance (km)
0.50
0.60
0.70
0.90
1.00
1.30
1.70
2.00
2.50
The following performance is typical with Long-Reach EoVDSL ports:
Distance (km)
0.50
1.00
1.50
EoVDSL Performance
Distance (feet)
1600
2000
2300
3000
3300
4300
5600
6600
8200
Downstream (Master
Distance (feet)
to Slave) (Mbps)
1600
3300
4900
Downstream /
Upstream (Mbps)
35
30
25
20
15
10
5
2.5
1.2
Upstream (Slave
to Master) (Mbps)
40
20
25
5
20
0.54
Chapter 3
Communication Ports
Time to Achieve Port Up
in Auto Mode (Seconds)
15
30
45
60
75
90
105
120
150
Time to Achieve
Port Up in Auto
Mode (Seconds)
15
30
45
17
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