Jackson, 6-3, 311-pound, was previously with the Packers' practice squad Oct. 2-5.
"I kept up with the teams that seemed to be interested and I wasn't surprised by the call from Green Bay," Jackson said.
The 25-year-old Jackson, a three-year starter as a collegian at LSU, originally was signed by the Dallas Cowboys as an undrafted free agent in 2000. After seeing action at both right and left guard in the preseason as a rookie, he was inactive for the first 10 games of the regular season, then appeared in three of the Cowboys' last six contests. He was inactive for all 16 regular-season games in 2001.
Allocated to the Rhein Fire of the NFL Europe League for the NFLEL's 2002 season, Jackson garnered all-league honors at guard as he helped fellow honoree and teammate Jamal Robertson finish third among running backs with 792 yards and 8 touchdowns on 151 carries. He returned to training camp with Dallas in July and was with the Cowboys through the preseason before being waived in the team's final roster reduction for the regular season Sept. 1.
Jackson, who joined the Packers on the practice field today, has been assigned jersey No. 64. He said he's looking forward to Sunday night's game at Lambeau Field.
"It's exciting, that atmosphere," Jackson said.