Chapter 2: Network Requirements
2-2
DLE28-MA User’s Guide
2.3
100BASE-TX NETWORK
The DLE28-MA, with a DELTX-UI installed in ports 25 and 26, provides
an RJ45 connection that supports Category 5 UTP cabling. The device at
the other end of the twisted pair segment must meet IEEE 802.3u
100BASE-TX Fast Ethernet network requirements for the devices to
operate at 100 Mbps.
2.4
100BASE-FX FIBER OPTIC NETWORK
Ports 25 and 26 of the DLE28-MA support the DIGITAL DELFX-UI and
DELF3-UI fiber optic interface modules. The device at the other end of
the fiber optic segment must meet the 100BASE-FX Fast Ethernet
network requirements to operate at 100 Mbps.
Single Mode Fiber Cable Lengths
The maximum single mode fiber optic length of a 100BASE-FX segment
may be no more than 5 km between Data Terminal Equipment (DTE to
DTE) in half duplex mode or 20 km (DTE to DTE) in full duplex mode.
The DLE28-MA with a DELFX-UI installed is capable of
operating at either 10 or 100 Mbps. The DELFX-UI can
automatically sense the speed of the other device and adjust its
speed accordingly.
