plot \
transmit_data using (0):(0):($1 - t0):($1 - t0 + $8):(0):(0.5) with boxxy \
fs solid noborder lc "#90caf9" title 'outgoing calls', \
- receive_data using ($1 - t0):(0.5) with impulses lw 2 lc '#ff3d00' title 'ingoing rings', \
+ receive_data using ($1 - t0):(0.5) with impulses lw 2 lc '#ff3d00' title 'incoming rings', \
receive_data using ($4 > 0 ? $1 - t0 : 1/0):(0.53):(-$4):(0) with vectors arrowstyle 1 notitle, \
receive_data using ($4 > 0 ? ($1 - t0) - ($4 / 2) : 1/0):(0.56):(morse_symbol(strcol(6))) with labels notitle, \
receive_data using (end_of_signal(strcol(6)) ? ($1 - t0) : 1/0):(0.61):(text_character(strcol(6), strcol(8))) with labels font "Courier,14" notitle, \