Motorola ML900 HK1223 Owner's Manual page 69

The modem interfaces to the equipment's controller by using the data
interface port. The protocol supported over this link is a Native Control
Language (NCL).
Although the modem has embedded software, it has built in
application software. All application software must be separately
installed and run from the device to which the modem is
connected.
Features
The PRM240 Modem has the following features:
− Serial communications interference port (TTL level)
− Indicator lights shown the status of the network coverage and power
supply.
− Four configurable digital Input/outputlines for external
control/monitoring
−Software configurable RF calibration adjustments to suit
specificnetworks
− High sensitivity reception
− Small footprint and low profile design
− Low-voltage and low standaby current consumption for battery based
products
− Auto-wake up of host on incoming messages
− Roaming capabilities as used in DataTAC network
− Easy to install, service and update
FeaturesThe PRM240 modem is easily connected to many other
devices and can be incorporated into a variety package formats.
The modem has a TTL serial port.
2-26 Operating Your Computer