anchor.diff:    type sysmobts
     band GSM850
     cell_identity 0
  -  location_area_code 1
  +  location_area_code <%= @lac %>
     base_station_id_code 63
     ms max power 33
     cell reselection hysteresis 14
  
positive.code:   type sysmobts
    band GSM850
    cell_identity 5
    location_area_code 1
    base_station_id_code 63
    ms max power 33
    cell reselection hysteresis 14
  
negative.code:   type sysmobts
    band GSM850
    cell_identity 3
    location_area_code <%= @lac %>
    base_station_id_code 63
    ms max power 33
    cell reselection hysteresis 14
  