Ventura FD no longer has their own channels, they are dispatched by Ventura County Fire, and are on the Ventura County fire radio plan.
Oxnard FD uses: 154.145 (141.3) for dispatch, and 154.07 (123.0) for tactical/command operations.
Ventura County Fire's channel 1 (155.055) is used for any unit that is available/not assigned to a call. That means units driving around, in station, in bed, etc.... Once a unit is assigned to a call, they are immediately switched to one of the command channels (Channel 8 for the eastern part of the county, Channel 5 for the western county, and channel 2 for brush fires).
The unit is sent their two-tone signal on 155.055 with no pL tone. But, all of the units in the field have a pL tone set on receive to 82.5Hz. The reason is that a unit can be driving around, and since their radio is set with a receive pL tone, they won't have to listen to the tones all day as units get dispatched. That is because the VERBAL part of each dispatched is transmitted with the pL of 85.4, but the initial tones are not.
The units don't verbalize their en route status via radio, unless they are a non-MDC unit. If the unit does acknowledge en route (no MDC, or MDC malfunction), then they do so on their assigned command channel (2,5,8), not on channel 1. Channel 1 is reserved for units not assigned to a call.
The MedNet channels are rarely used. Mostly on drills for MCIs. Most traffic for any call is on the command channel, and then once on scene of significant incidents, the "worker bees" will switch to the assigned tactical channel (Channel 3,6,9) while the incident command personnel keep a radio on command, and another on tactical, so that they can talk to not only the units on scene, but also the dispatchers.
Los Padres: Emergency traffic is dispatched on Forest Net 170.55. They don't use tone out... all units just monitor the radio during the day. Service net 171.55 is used for non-emergency radio traffic, or non-fire/law personnel. It is also used as a backup dispatch channel if the primary forest net is being used heavily for an incident. For example, if there is a big incident in the Monterey District, the Mount Pinos guys won't hear the radio traffic. Dispatch will advise all units not on the incident or in the Monterey District to switch to service net until the incident is concluded. And dispatch does not have access to the tactical channels.