GE Medical Systems Dash 3000, Service Manual, Page: 50 / 232

INSTALLATION: Optional Ethernet Communication
3-8 Dash 3000/4000 Patient Monitor Revision B
2000966-105
Bridge A bridge is more selective than a repeater with the data that it passes
between segments. It also acts as a transceiver between two segments,
but it only passes signals if a node on one of the segments is attempting
to communicate with a node on the other segment. Since the majority of
communication on the network occurs within a single segment, the
bridge does not pass all of the data from one segment to the other. This
lowers the amount of data traffic passing between segments, and makes
the network more efficient than a system that is connected with
repeaters.
Twisted Pair Cabling
(10BaseT) Twisted pair is an IEEE 802.3 local area network that uses flat and small
diameter cable containing four pairs of twisted wires to connect devices.
Twisted pair operates at the same speed as thin-net and thick-net (10
megabits/second), but the cable distances extended up to 100 meters (328
feet).
A twisted pair transceiver passes data back and forth between the
network device and the LAN. It is attached directly to the network device
at the at the 15-pin D-type connector. The twisted pair cable is connected
from the RJ-45 connector at the transceiver and the RJ-45 connector at
the concentrator.
NOTE: Some devices (like Octacomm/Solar 8000M patient monitor)
have 10BaseT standard meaning that the RJ-45 connector is
part of the product and the twisted pair transceiver is not
required.
Symbol PC Card
(Wireless LAN) The Symbol PC card, installed in the monitor, uses a 2.4 GHz frequency
band and a Frequency Hopping spread spectrum (FHSS). The Frequency
Hopping spread spectrum meets IEEE 802.11 standards.
Two diversity antennas, installed in the handle of the monitor, radiates
the RF energy through the air to a Symbol Access Point. The Symbol
Access Point also uses a 2.4 GHz frequency band and the Frequency
Hopping spread spectrum.
NOTE: Refer to the Wireless LAN (Symbol Access Point) Installation
and Service Manual for detailed information on the Symbol
Access point.
NOTE: The following is required for the monitor to roam from access
point to access point while maintaining Wireless LAN
communication with the Unity Network.
• Installation of the RF LAN (Wireless LAN) option.
• Configuration and verification of the monitor’s RF LAN
operation.
• Activation of the RF LAN by disconnecting the monitor’s
Ethernet cable.