Communication Ports
4.2.2 Configuration and Setup
• Twisted-pairs are an effective way of reducing both magnetic and capacitive
interference, as they reduce the magnetic loop area to nearly zero and maintain
a consistent distribution of capacitances to both ground and other sources.
Therefore, make sure twisting is consistent throughout the cable length.
• Open leads (also known as bridged taps or drop-lines) along the length of the
cable will cause an impedance mismatch and result in VDSL signal degradation.
• Make sure the cable impedance is consistent throughout the cable run. Avoid
mixing different wiring (e.g. wiring with different gages) in cable runs, as this
will cause an impedance mismatch and result in VDSL signal degradation.
• Make sure wiring is adequately separated between power and control circuits.
Switching spikes and surges in power and control circuits can couple noise onto
the VDSL line, causing interruptions in communications.
• Lower speeds are less susceptible to interference and will transmit greater
distances over the same wiring than higher speeds. Use the minimum speed that
will provide adequate data transfer speed.
4.2.2
Configuration and Setup
If the RUGGEDCOM RS930L and another device both have Universal EoVDSL ports,
configure one device to be the Master and the other the Slave. If both devices have a
Long-Reach EoVDSL port, no Master/Slave configuration is necessary, since the ports
will already be fixed as Master or Slave.
Once configured and connected together, each device will attempt to achieve the
maximum speed based on the line length and conditions. The RUGGEDCOM RS930L's
Link/Act
LED may flash on and off several times before setting on a final link speed
and declaring the port up.
For more information about configuring the RUGGEDCOM RS930L , refer to the
RUGGEDCOM ROS Configuration Manual
for the RS930L.
4.2.3
EoVDSL Performance
The following describes the behavior and performance characteristics of EoVDSL.
EoVDSL Modes
The EoVDSL ports can be configured to operate in one of two modes:
•
Auto Mode (default)
In Auto Mode, the device will step through the different speeds and
automatically select the best bit-rate based on the current line conditions.
•
Manual Mode
In Manual Mode, the user can select one of the speed settings and the device will
only attempt to attain the set speed.
RUGGEDCOM RS930L
Installation Manual, 04/2021, C79000-G8976-1034-09
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