Planning Cable Runs - Philips IntelliVue Telemetry System Infrastructure Installation And Service Manual

Chapter 2: Planning Your ITS Deployment
The location of equipment closets is a relevant consideration as these closets will
be used to house the supporting AP and ICN infrastructure. For this reason,
equipment closets must be located within 328 feet (100 meters) cable length of
each IntelliVue ITS AP to be installed.
Equipment closets must house the ICN network switches, APCs, PoE Units, and
Sync Units. You should assess the needed or available rack space within each
equipment closet at this time.

Planning Cable Runs

The ITS APs require an infrastructure to support their datapath, RF synchronization
and power needs. Network switches, Power over Ethernet (PoE) Units, and Sync
Units are connected serially between the AP and the devices that receive its data.
The devices are connected as shown in Figure 2-11.
From a design perspective, careful analysis of the site's layout, wire run options and
equipment closet locations will dictate the optimal ITS infrastructure layout. Ideally,
each PoE/Sync Unit pair will support 12 APs, as each has 12 ports available on it.
For this to be the case, the APs must all be located within 328 ft (100m) of the
network switch to which they are connected, as the Ethernet wire run limitation for
data cables applies; and the PoE and Sync Units must be placed within this run, as
they (PoE and Sync Units) do not buffer and re-drive the data signals like some other
network devices do.
Thus, each Network Switch/PoE/Sync Unit must be co-located in an equipment
closet within 300 feet of each AP they support. In instances where available wiring/
equipment closets are located more or less centrally within or near the coverage
area, 12 APs may be within a 300 foot radius of the equipment closet.
However in an extreme case, if all 12 APs are linearly placed in a single corridor and
separated by 40 feet (for example), the resulting coverage area would be nearly 500
feet long. This means that unless the available POE/Sync/Network Switch
equipment closet was in the center of that coverage area, the POE/Sync/Network
2-12
LAN Cable
Maximum
Total Distance
from Switch to
Access Point =
100m (328 ft)
Figure 2-11: Maximum AP to Switch Cable Length
"Data, Power, & Sync" Ports
- data, 48VDC, & Sync Signal
"Data & Power" Ports
- data & 48 VDC Power
"Data" Ports
- data only
Switch Port Settings
100 Mbps/Full Duplex