quantum-espresso/test-suite/epw_wfpt/ph.in

--
&inputph
  prefix   = 'BAs'
  reduce_io = .true.
  epsil    = .true.
  fildyn   = 'BAs.dyn'
  ldisp    = .true.
  fildvscf = 'dvscf'
  nq1 = 2
  nq2 = 2
  nq3 = 2
 /