use provisioning;

DELETE FROM voip_preferences WHERE attribute IN (
  "AMR_bitrate",
  "AMR_octet_align",
  "AMR_mode_set",
  "AMR_mode_change_period",
  "AMR_mode_change_neighbor",
  "AMR_CMR_interval",
  "AMR_mode_change_interval",
  "AMR_WB_bitrate",
  "AMR_WB_octet_align",
  "AMR_WB_mode_set",
  "AMR_WB_mode_change_period",
  "AMR_WB_mode_change_neighbor",
  "AMR_WB_CMR_interval",
  "AMR_WB_mode_change_interval");
