Progline said:
I beleive that the backcountry guys are "WILDERNESS" units, and the Front Country Types are "RECREATION"
On Forests that are using the functional call signs this is correct. The first number following the functional name is the ranger district and that is followed by the persons rank in that function on that district. On those that still use numbers only, such as the Sierra National Forest, all recreation units identify with a number following the the district number that is quite often a six, but might be a four as it was before the Los Padres NF started using funcitonal call signs, and a five, in the case of the Cleveland, before they switched theirs. So a call sign for a wilderness ranger might sound like "3-6-5". On the Toiyabe National Forest, which borders Yosemite and several R5 Forests with wilderness areas, the recreation function has a number of two, and follows the agency number (7 in this case which is short for Forest number 17 in R4), followed by the district number, followed by the function, and finally by the rank.
When I was in Region 3 (Arizona and New Mexico) recreation was always designated by the number five. Some regions do not use numbers for any individual, instead using the persons last name. Regions 1 (Northern) and 2 (Rocky Mountain) do this, but some of the Forests in those regions are beginning to change as using a last name does not work well when people need to work other agency radio systems.
Some other regions have Regional Work channels as well with Regions 1 and 6 (Pacific Northwest) coming to mind. When I worked for the USFS I would have liked them to standardize the system nationwide. The functional callsigns work the best, especially during interagency operations.
Law enforcement in R5 id's with the Forest Number first, a letter next with Edward for LEO, Lincoln for Patrol Captain, David for Special Agent, and Charles for a special agent in charge of one of three different forest groups in R5 (grouped according to geographical location), and followed by the district number or rank among LEO's on the entire Forest. So the Inyo is Forest #4 and the Mammoth District is #2 so their LEO is 4-Edward-2. They tried to design a system that fit in better with the rest of law enforecement when they did this.
Other functions you may hear in R5 include: wildlife, timber (when the timber management function is large enough so it isn't lumped in with Resources), Resources (typically range, wildlife, hydrology, if they are lumped), Wildlife (big enough function on some districts to warrent this), Lands (administration of special use permits, easements, and land acquisistion/exchange), Recreation, and Wilderness. Engineering (engineers, building maintenance, road maintenance, and the like) usually uses Utility as a call sign. The rest are in fire and are self explanatory.
Hope that helps.