Virginia-based Teligent recently sent form letters about theimpending cutoff to a number of owners and businesses in OrangeCounty, San Diego and San Jose. Teligent spokeswoman Tita Thompsonwon't say what other markets across the US might also be affected,but that the company will continue to service customers in LosAngeles.

Teligent's decision to stop servicing some markets means manybuilding owners and tenants will have to find a new provider fortheir telephone and Internet service. Lining up new providersbefore the June 25 cut-off date could be a difficult task, becausemany such providers are backlogged with work.

Compounding problems, Teligent isn't the only telecommunicationscompany to recently curtail service or file for bankruptcyprotection. NorthPoint Communications, which had signed up morethan 100,000 customers, has gone out of business and WinStarCommunications also recently filed for bankruptcy.