Zoom Telephonics Inc. said its normalized net income for the first quarter came to a loss of $454,840, compared with income of $2,860 in the year-earlier period.

Normalized net income excludes unusual gains or losses on a pre- and after-tax basis.

The normalized profit margin dropped to negative 16.7% from 0.1% in the year-earlier period.

Total revenue declined 11.1% on an annual basis to $2.7 million from $3.1 million, and total operating expenses grew 13.8% on an annual basis to $3.4 million from $3.0 million.

Reported net income came to a loss of $678,400, or a loss of 5 cents per share, compared to income of $4,570, or 0 cents per share, in the prior-year period.