Initially, neither the man nor a woman who was also in the vehicle could tell the dispatcher where they were or even what side of the city they were on, the tape reveals.

By the time authorities found them, three of the four people who had been inside a car that crashed off a 170-foot cliff into a rock quarry early Saturday were dead.

The victims were identified as Troy Adams, 24; Mark Gaches, 23; and Andrea Merriman, 21. Amanda Stone, 19, was seriously wounded.

Testing on an enhanced wireless system, technology that might help emergency responders find victims who are dialing 911 from wireless phones, began Tuesday in the Tulsa area.

The testing this week is focused on AT&T Mobility, the cellular phone provider with the largest number of towers in the Tulsa area, White said.

AT&T Mobility is testing in all of the 11 jurisdictions that make up the Regional 911 Board, said Darita Huckabee of the Indian Nations Council of Governments.

Those jurisdictions are Tulsa, Bixby, Claremore, Collinsville, Glenpool, Jenks, Owasso, Sand Springs, Sapulpa, Skiatook and Rogers County, she said.

Without enhanced 911, authorities can determine only the general location of the cell phone tower off which a 911 call from a cell phone might have bounced.

Ken White, operations manager for the Tulsa 911 center, said the testing had been planned to start on Tuesday for three or four weeks and was not started in response to the weekend crash.

“We are in the midst of testing right now,” he said Tuesday. “We will be testing all week with them. Barring any major problems — which we don’t anticipate — when we are done by the end of the week, we will be able to get the location of AT&T Mobility customers within 300 meters.”

In the city of Tulsa, AT&T Mobility has about 600 towers, he said. Other cellular phone providers need to test their equipment within about 90 days, but most of them should be done before that, White said.

In December 2005, voters in Tulsa County approved a surcharge — 50 cents per cellular phone per month — to fund enhanced wireless service.

Fees collected in the city of Tulsa in 2008 totaled more than $1.8 million, and more than $280,000 was collected in unincorporated parts of Tulsa County that same year, records show.

By law, the money must be placed in a special 911 account in each jurisdiction and spent only for 911 wireless services, including such things as equipment, service and mapping, Huckabee said.

Investigation continues: While the final report on the quarry crash at 137th East Avenue and 46th Street North is not complete, some new details have emerged. Officer Jason Willingham said Tuesday that police think the vehicle was going at least 69 mph when it left the roadway.

The preliminary investigation indicates that the driver drove through a locked gate, over two boulders and off a 170-foot cliff into the pit.

The first 911 call was received at 3:32 a.m. and was routed to a police dispatcher. The dispatcher talked to Stone and one of the male victims. Neither was able to tell the dispatcher where they were.

Willingham said that 21 minutes into the call, the male voice says “129th” followed by something unintelligible. The dispatcher believes that the man said “15th,” so police were dispatched to the area of 129th East Avenue and 15th Street, he said.

Stone apparently then placed a second call that did not go through. Then she placed another call at 4:45 a.m. Saturday, and it was routed to a dispatcher for the Emergency Medical Services Authority.

The EMSA dispatcher talked to Stone for more than an hour as emergency crews from Tulsa, Bixby and Broken Arrow searched creeks, ravines and cliffs. They could not determine her location until Stone said they might be at a rock quarry.

Once they found the scene of the crash, EMSA workers, police officers and firefighters helped carry Stone, strapped to a backboard, to an ambulance.

The other three were dead when rescue workers arrived, EMSA spokeswoman Tina Wells said previously.