In March, when the $39 billion deal was disclosed, the companies said AT&T would pay the German group a record break-up fee of $3 billion, but they did not put a value on other parts of the agreement.
$3 billion would flow directly in cash, but Deutsche Telekom would also receive spectrum and a national roaming agreement, a Deutsche Telekom spokesman said.
The company did not put a value on that, but according to analysts' estimates the spectrum and roaming agreement would amount to $3 billion, he added.
Sources familiar with the matter had told Reuters on Thursday that the agreement included about $2 billion worth of spectrum and a roaming agreement valued at roughly $1 billion.
Deutsche Telekom CEO Rene Obermann said on Thursday that he was confident the transaction would be completed in the first half of next year.
The deal needs approval from the U.S. telecommunications regulator, the Federal Communications Commission, and the Department of Justice, which examines antitrust issues around mergers.
AT&T's chief executive, Randall Stephenson, defended the deal at a hearing held by skeptical lawmakers on Capitol Hill on Wednesday.
Obermann is due to testify later in May. (Reporting by Nicola Leske; Editing by Will Waterman)