The steep dropoff may have led to multiple layoffs of its phone bank workers.

The Republican National Committee, hit by a grass-roots donors’ rebellion over President Bush’s immigration policy, has fired all 65 of its telephone solicitors, Ralph Z. Hallow will report Friday in The Washington Times.

Faced with an estimated 40 percent fall-off in small-donor contributions and aging phone-bank equipment that the RNC said would cost too much to update, Anne Hathaway, the committee’s chief of staff, summoned the solicitations staff last week and told them they were out of work, effective immediately, the fired staffers told The Times.

The national committee yesterday confirmed the firings that took place more than a week ago, but denied that the move was motivated by declining donor response to phone solicitations.

“The phone-bank employees were terminated,” RNC spokeswoman Tracey Schmitt wrote by e-mail in response to questions sent by The Times. “This was not an easy decision. The first and primary motivating factor was the state of the phone bank technology, which was outdated and difficult to maintain. The RNC was advised that we would soon need an entire new system to remain viable.”

Fired employees acknowledged that the committee’s phone equipment was outdated, but said a sharp drop-off in donations “probably” hastened the end of the RNC’s in-house phone-bank operation.