Specifications

ES1008 Operating Manual Page 5
more frames from entering by forcing a collision signal on all receiving half-duplex ports in order to stop incoming
traffic.
The latency (the time the frame spends in the switch before it is sent along or forwarded to its destination) of
the ES1008 switches varies with the port-speed types, and the length of the frame is a variable here as it is with all
store-and-forward switches. For 10Mbps-to-10Mbps or 10Mbps-to-100Mbps or 100Mbps-to-10Mbps forwarding, the
latency is 15 microseconds plus the packet time at 10Mbps. For 100Mbps-to-100Mbps forwarding, the latency is 5
microseconds plus the packet time at 100Mbps.
3.0 LOCATION OF THE ES1008 SWITCHES
The location of a Waters’ ES1008 switch is dependent on the physical layout of the network. The switch can
be placed in a central wiring location or preferably a workgroup area where groups of network devices need to be
connected in order to communicate with each other. With Waters’ rugged enclosed housing, the switches are
typically wall mounted, or, with the rubber feet, they can also be installed on a shelf or tabletop. The rugged housing
of the ES1008-switch protects the electronics from environmental conditions and limits any tampering of the
connections. For power, locate an AC receptacle that is within six feet (2 meters) of the location of the switch.
Maintain an open view of the front to visually monitor the status LEDs. Keep an open area around the unit so that
cooling can occur while the unit is in operation.
3.1 Connecting Ethernet Media
The ES1008 Switches are specifically designed to support all standard Ethernet media types within a single
switch unit. The various media types supported along with the corresponding IEEE 802.3 and 802.3u standards and
connector types are as follows:
IEEE Standard Media Type Max. Distance Port Module
Fiber:
100BASE-FX
mm
1
fiber 2 km (6,562 ft) ES1008-MSC, MST
sm
2
fiber 18 km (95,000 ft) ES1008-SSC
small form factor mm
1
fiber 2 km (6,562 ft) ES1008-MTRJ, VF45
Copper:
10BASE-T & 100BASE-TX twisted pair 100m (328 ft) RJ45
1
mm = multimode
2
sm = singlemode
3.2 Connecting Twisted Pair (RJ45, CAT3, CAT5, Unshielded or Shielded)
The RJ45 ports of Waters’ ES1008 switch can be connected to the following two media types: 100BASE-TX
and 10BASE-T. Category (CAT) 5 cables should be used when making 100BASE-TX connections. When the ports
are used as 10BASE-T ports, CAT3 may be used (although the use of CAT3 cabling is not recommended). In either
case, the maximum distance for unshielded twisted pair cabling is 100 meters (328 ft).
Media IEEE Standard Connector
Twisted Pair (CAT3, 4, 5) 10BASE-T RJ45
Twisted Pair (CAT5) 100BASE-TX RJ45
Note : It is recommended that high quality CAT5 cables (which work for both 10Mbps and 100Mbps) be used whenever possible in
order to provide flexibility in a mixed-speed network, since dual-speed ports are auto-sensing for either 10 and 100Mbps.