Putnam is very similar to Dutchess. Each engine(2), tanker(4), ambulance(7), rescue(6) and ladder truck(5) has its own number which would be followed by the deptartment number.Department numbers for example Lake Carmel 17, Mahopac 18, Carmel 12. It works alphabetical. So when an engine signs enroute it would go like this" 40 control this is 17-2-1(Lake Carmel'sengine) , 17-2-1 enroute." or "40 control this is 18-5-1 (mahopacs Ladder truck), 18-5-1 on location."Also in some Putnam County departments Captains respond to the scene and they have there own numbers.Lake Carmel has three and there numbers are 17-9-4,17-9-5 and 17-9-6. It is the third number in the line that represents the rig or person that is reponding. The way Putnam dispatchs has its moments. One good thing is 40 control dispatchs on one channel(46.38 ) and Fire Departments sign enroute on another channel(46.54) then the department has a home channel(fire ground)(46.50, 46.30).