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

--
&inputph
  prefix   = 'sic'
  fildvscf = 'dvscf'
  outdir   = './'
  ldisp    = .true
  epsil=.true.,
  fildyn   = 'sic.dyn'
  nq1=3,
  nq2=3,
  nq3=3,
  tr2_ph   =  1.0d-12
 /