Installation guide

Ethernet Wiring Configuration
2-8
Ethernet Wiring Configuration
The RoamAbout R2 supports the 100BaseT Ethernet cabling standard with auto
negotiation. If you have an existing 10BaseT Ethernet cable in place, you can connect the
cable directly to the RoamAbout R2. You can also connect the Ethernet cable to the remote
power injector, then connect the remote power injector to the RoamAbout R2.
The RoamAbout R2 supports auto-crossover detection. You can use straight-through or
crossover cables for Ethernet connectivity.
CAT 5 Cabling Standards
There are four common CAT 5 Cabling Standards. Three of these, EIA 568A, EIA 568B,
and EIA 356A, are recommended for RoamAbout R2 installations. The fourth standard,
USOC, has advantages when dealing with telephone wiring but is strongly not
recommended for use in data applications.
All CAT 5 information presented here also applies to CAT 3. However, CAT 3 is not
recommended for 100BaseT Ethernet connections.
• If new wiring is installed for the RoamAbout R2, it is extremely important to know
which standard was used to install the existing wiring.
• It is also important that new wiring complies with and is tested to CAT 5 Cabling
Standards. Miswiring of data pairs can result in a faulty Ethernet connection and
possible power problems.
• In the event of data or power miswiring when using the RoamAbout R2 power supply
and remote power, the power supply folds back and does not damage the R2.
• If you are not using a RoamAbout R2 power supply, miswiring of data or power may
damage the R2. Use care when installing the wiring for the Remote Power feature.
CAUTION: If you are installing the RoamAbout R2 in Air Space or a
Plenum environment, the RoamAbout R2 must only be powered by the
Remote Power Splice through a Plenum-rated CAT-5 cable. The Remote
Power Splice, Power Supply, and Security Cover do not meet Plenum
requirements and must be kept out of Plenum areas.
Before you install the RoamAbout R2 in Air Space or a Plenum
environment, you should check with your local building and electrical
inspector for local regulations concerning electrical code requirements
for Plenum installations.