Covad Communications

(COVD)

, which last week said it would

delay reporting its fourth-quarter results, said Tuesday it would take restructuring charges for 2000 and 2001 of $50 million to $100 million.

The charge was included in new information on its revenue recognition procedures provided at the request of

Nasdaq

.

Trading in the company's shares, which was halted since last week, resumed at 12:30 p.m., ET. The shares recently plunged $1.19, or 40%, to $1.69.

The company, which previously announced a $20 million fourth-quarter 2000 charge for layoffs facilities closings, said it has also started a review of its contracts, billings and marketing development funds and credits, as well as restructuring and impairment charges.

The provider of high-speed digital subscriber line service, based in Santa Clara, Calif., said the impact of its revenue-recognition review could reduce 2000 revenue by about $52 million and increase earnings before interest, depreciation, taxees and amortization, or

EBIDTA, losses by about $17 million, even as "further analysis is required to confirm these estimates."

Covad also said it informed Nasdaq that restructuring charges and tangible asset impairment charges for 2000 and 2001 could be in the range of $50 million to $100 million. It expects credits recorded against revenue from customers in 2000 to be $15 million, and marketing development funds to be $38 million.

In addition, Covad said it recorded goodwill and other intangible assets of about $120 million from its purchase of DSL provider

BlueStar Communications

. The company said it has yet to determine the magnitude of any write down and that it would take "at least several weeks" to complete its entire review.

The broadband services provider has not been the only DSL provider to be hit by

difficulties. Rival

NorthPoint Communications

(NPNT)

filed for bankruptcy last month while

Rhythm NetConnections

(RTHM)

recently eliminated about 23% of its workforce.

Shares of Rhythm slipped 22 cents, or 15.91%, to $1.19 in afternoon activity on the Nasdaq.