.inputs
  = f.input :sip_account_id, :label => t('pager_groups.form.sip_account_id.label'), :hint => conditional_hint('pager_groups.form.sip_account_id.hint')
  = f.input :callback_url, :label => t('pager_groups.form.callback_url.label'), :hint => conditional_hint('pager_groups.form.callback_url.hint')