Communication Ports
4.3.1 EoVDSL Wiring
Pin-Out
The following is the pin-out for the RJ11 connectors:
Note
All RJ11 connectors conform to the standard telephony pin configuration.
1
6
Figure 4.8
EoVDSL RJ11 Modem Port
Pin
Description
1
Reserved (Do
Not Connect)
2
Reserved (Do
Not Connect)
3
Ring
4
Tip
5
Reserved (Do
Not Connect)
6
Reserved (Do
Not Connect)
4.3.1
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:
• 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 Tele-
phone Network (PSTN).
• To reduce the risk of fire, use only #26 AWG or larger telecommunication line
cord.
• Twisted-pairs are an effective way of reducing both magnetic and capacitive in-
terference, as they reduce the magnetic loop area to nearly zero and maintain a
consistent distribution of capacitances to both ground and other sources. There-
fore, make sure twisting is consistent throughout the cable length.
• Open leads (also known as bridged taps or drop-lines) along the length of the ca-
ble 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 dis-
tances over the same wiring than higher speeds. Use the minimum speed that
will provide adequate data transfer speed.
RUGGEDCOM RS910L
Installation Manual, 02/2020, C79000-G8976-1030-06
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