Chapter 2 System Description Gen 3 Site Controller System Manual
Site Controller
2-6 68P80801E30-A 5/1/2002
■ 32 MBytes of FLASH on the PPC bus
■ 64 MBytes of SDRAM on the PPC bus
■ 16 MBytes SDRAM on the MPC8260 local bus
■ 32 KBytes battery backed SRAM with real time clock on the MPC8260
local bus
■ Four E1/T1 span lines supported by a single quad E1/T1 framer/line driver
IC
■ One 10/100BaseT ethernet port
■ Three 10Base2 ethernet ports
■ One X.21 port
■ One IEEE 1284 parallel port
■ Two RS232 serial ports
■ Internal or remote GPS Receiver
■ Three time/frequency reference outputs
Environmental Alarm
System
EAS/EAS2 Functional Description
The EAS/EAS2 (Environmental Alarm System) provides a central location
for site alarm signal processing. The EAS/EAS2 monitors site
environmental conditions, including AC power, smoke alarms, intrusion
alarms, antenna tower lights, etc.
Alarm wiring routes directly from the EBTS equipment and power supply
equipment to the EAS/EAS2. The EAS/EAS2 sends alarm status to the site
controller via the IEEE 1284 parallel connection.
The EAS/EAS2 can monitor up to 48 inputs, each of which must be a
contact closure between the alarm input and its return. Alarm inputs are
optically isolated. The EAS/EAS2 also provides eight relay outputs. Four
RJ45 connectors replicate the physical interfaces to the three RF cabinets
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