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Chapter 3
Communication Ports
Status LED
NOTE
All RJ11 connectors conform to the standard telephony pin configuration.
The following is the pin-out for the RJ11 connectors:
6
Figure 14: EoVDSL RJ11 Modem Port
The following sections describe the EoVDSL ports in more detail:
•
Section 3.3.1, "EoVDSL Wiring"
•
Section 3.3.2, "Configuration and Setup"
•
Section 3.3.3, "EoVDSL Performance"
Section 3.3.1
EoVDSL Wiring
VDSL operates over 2-wire Category 3 (CAT-3) or higher twisted-pair wiring. Other twisted-pair wiring with
similar characteristics may work, although the performance will vary depending on the cable characteristics and
distance.
When wiring EoVDSL ports, note the following:
• Twisted-pairs are an effective way of reducing both magnetic and capacitive interference because 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 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 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.
16
State
Off
1
Description
No link detected
Pin
1
Reserved (Do Not Connect)
2
Reserved (Do Not Connect)
3
4
5
Reserved (Do Not Connect)
6
Reserved (Do Not Connect)
RUGGEDCOM RS900L
Installation Guide
Description
Ring
Tip
EoVDSL Wiring
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