That is VoiceStream's primary technology, and Hamilton notes that AT&T plans to overlay its network based on TDMA technology with GSM--a system prevalent throughout Europe. AT&T Wireless is expected to partner in its bidding with Alaska Native Wireless, which made an impressive down payment of more than $238 million. AT&T Wireless owns a stake in Alaska Native Wireless, which was formed to bid in this auction by Arctic Slope Regional, Doyon and Sealaska, all of Alaska. Other down payments made included those by Verizon Wireless at just over $130 million and Sprint PCS at just under $70 million. Cingular Wireless affiliate Salmon PCS led the pack at just over $238 million. Verizon Wireless is a joint venture of Verizon Communications and Vodafone, and Cingular Wireless is a BellSouth - SBC Communications joint venture.