ADS Environmental Services Model 3600 530002 A2 - Manual (Page 21)

2-6 ADS 3600 Flow Monitor O&M Manual
IS Modem and Telephone Interface Box
If the QS3600 flow monitor uses an IS modem instead of an EMU, it is located within
the QS3600 monitor housing and complies with IS regulations. This modem
communicates with the central computer via a telephone interface box, located on the
telephone pole or on a nearby pedestal. (The IS modem does not require a separate
battery for power; it uses the monitor’s battery pack.)
Routing the electricity through the telephone interface box prevents voltage from
going directly into the potentially explosive manhole environment. To protect the
telephone interface box from dangerous lightning and high voltages, the telephone
lines can first be run through a lightning protection module (ADS part number
103313A). The QS3600 flow monitor can be programmed to communicate at various
baud rates. For more information on the modem’s capabilities and installation, see
Chapter 5, “Monitor Installation and Activation.”
IS Modem on the Processor Board
IS Modem on the Processor Board