The board of Nippon Telegraph & Telephone Corp. is planning this week to discuss a proposed takeover of Dell Inc.'s Perot Systems division, according to two people with knowledge of the matter.

The board of Japan's biggest phone company will discuss issues including a price range its NTT Data Corp. unit would offer for the technology consulting business, said the people, who asked not to be identified because the deliberations are private. An offer could be approved as soon as this month, one of the people said.

An acquisition — Nikkei has reported the offer may exceed ¥400 billion ($3.6 billion) — would be NTT Data's biggest ever as the network-services provider looks to acquisitions to increase sales outside of Japan.