* XO Communications of Reston wrote the Federal Communications Commission yesterday to protest negotiations underway between the major local and long-distance phone companies. The FCC-sponsored talks are an attempt to reach private agreements governing the rates that long-distance companies such as AT&T must pay to offer local phone service over networks owned by regional companies such as Verizon Communications. XO says in the letter that it has been excluded from the "secret and exclusive" talks and called on the FCC to expand their scope.

* PEC Solutions, a Fairfax professional services firm, acquired Integrated Information Technology, a satellite communications engineering and information technology provider for the federal government, for $33 million in cash and $2 million in employee retention bonuses. IITC is headquartered in Denver and employs more than 270 people.

* DigitalNet, a Herndon information technology government contractor, said the Air Force Material Command awarded the company a $16 million Air Force System Networking contract. DigitalNet will continue to support the system networking program and will modernize portions of the Air Force's worldwide network communication infrastructure.

* Talk America, a Reston local and long-distance phone provider, said its board authorized a share buyback program to purchase up to $50 million of its outstanding common stock. Shares may be purchased in the open market or in private transactions.

* Elantic Telecom of Richmond named Brett Lindsey president. Lindsey was most recently vice president of sales and marketing at City Signal Communications.

Compiled from reports by Washington Post staff writers, Reuters, Business Wire and PR Newswire.