Airlink Raven GPRS - Manual (Page 50)

Modbus/BSAP Configuration
42 Cingular GPRS Raven User Guide Version 2.01
RTU settings
Other parameters may need to be changed, but this is dependent on the RTU type
being used. As a minimum, this typically involves setting the proper serial settings
to match your RTU.
FIGURE 9. Raven mounted in an enclosure with an RTU