I have always had 501.7375 programed in (not sure where I got It) They seem to have a lot of trouble with there West Comm dispatch (tg 4768). It wasn't working at all, then one day last week radio maintenance was doing radio checks on it and after that they started using it again. However today it seems like 4,5, and 11 cars are back to using 501.1625 and not using the trunk. West is where a lot of the activity is.