A federal negotiator planned to meet separately Wednesday with US WEST officials and representatives of the striking union to set the agenda for further negotiations.

US WEST spokeswoman Emily Harrison said she expected both sides will begin meeting face to face once a format for talks is established.Outside the negotiating arena, both sides in the four-day-old strike are complaining to the National Labor Relations Board about actions on the other side of the table.

US WEST filed a complaint Tuesday, alleging the union called the strike unlawfully, is intentionally dragging its feet to avoid bargaining and that it is "engaging in surface bargaining with no intent to reach an agreement."

The union is complaining US WEST is not providing information it needs to proceed with negotiations.

Also outside negotiations, US WEST has offered a $10,000 reward for information about damage to telephone network equipment in Colorado Springs, where it says an "expert" vandalized wiring boxes, knocking out service to about 1,000 telephone customers Saturday and Sunday.

The company has reported other vandalism incidents in Denver, Albuquerque and Farmington, N.M., since the strike began but has not implicated the union or striking workers in the incidents.

US WEST covers Utah, Arizona, Colorado, Idaho, Iowa, Montana, Minnesota, Nebraska, New Mexico, North Dakota, South Dakota, Oregon, Washington and Wyoming.