Installation manual

21
Chapter 4
Cabling
10BASE-T, 10BASE2, 10BASE5, or 10BASE-FL Choices
The T, BT, AT, and FT versions of the AT-1500 Plug and Play all
have a shielded RJ45 receptacle for connection to 10BASE-T
network segments. The AT-1500 Plug and Play is compatible
with 100 Ω Unshielded Twisted Pair (UTP) or Shielded Twisted
Pair (STP) wire. The AT-1500AT Plug and Play supplements the
RJ45 with an Attachment Unit Interface (AUI) to which
10BASE2, 10BASE5, or 10BASE-FL, an extension of the earlier
Fiber Optic Inter-Repeater Link (FOIRL) specification, may be
adapted by adding the appropriate transceiver. The AT-
1500Plug and Play BT has a BNC connector—in addition to the
RJ45—for direct connection, with T-connector and terminator, to
a 10BASE2 Ethernet segment (thin wire Ethernet or “cheaper
net”). The AT-1500FT Plug and Play includes ST-type transmit
and receive connectors for fiber optic media.
Auto or Pre-Set Port Selection (BT, AT, and FT)
An auto port-select option configures the AT-1500BT, AT, or FT
Plug and Play to sense which of its two ports is connected. In
auto mode, the factory default mode, the card checks to see if the
twisted-pair port is connected. If not, it attempts to use the other
port. The alternative is to pre-set the port selection using the
CardAssistant configuration menu. In pre-set mode, both ports
can remain connected to network segments of different media.
The active port is the one selected in CardAssistant.