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RS900 Family Installation Guide
3 Ethernet Ports
3.1 RJ11 Ethernet over VDSL Port
3.1.1 Overview
The Ethernet over VDSL (EoVDSL) port operates in pairs with one unit configured as the Master
and the other as the Slave. In VDSL literature the terms Central Office (CO) or Line Termination
(LT) are used interchangeably for the Master and the terms Customer Premise Equipment (CPE)
or Network Termination (NT) are used interchangeably for the Slave. The Master unit dictates the
line configuration settings to the Slave so all EoVDSL configuration is done on the Master. Data
flowing from the Master to the Slave is designated “downstream” while data flowing from the Slave
to the Master is designated “upstream”.
RuggedCom offers two flavours of VDSL: Universal EoVDSL and Long-Reach EoVDSL. Universal
EoVDSL ports are Master/Slave selectable and offer symmetric data rates up to 35 Mbps with
distances up to 2.5 km. Long-Reach EoVDSL ports are fixed as either Master or Slave but offer
asymmetric data rates up to 40 Mbps with distances up to 5 km. The Universal and Long-Reach
EoVDSL ports are physically indistinguishable from each other; however, you can determine which
port you have either from the order code or through the software.
3.1.2 Wiring
VDSL typically operates over 2-wire Category 3 (CAT-3) unshielded twisted-pair (UTP) wiring;
however, other categorized or uncategorized twisted-pair wiring will work although the performance
will vary depending on the distance and cable characteristics. It is important that the wiring used
does not have any open leads (also known as bridged taps or drop-lines) along its length because
this will impact performance by degrading the signal.
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