UPDATE 1-Plantronics Q1 profit beats; sees weak Q2 revenue

* Q1 adj EPS $0.58 vs est $0.48

* Q1 rev $170.7 mln, up 21 pct

* Sees weak Q2 sales

* Shares down 6 pct in extended trade

July 26 (Reuters) - Plantronics Inc (PLT.N) posted a better-than-expected quarterly profit, helped by strong demand for its office and contact center (OCC) products, but the headset maker forecast second-quarter sales below estimates, sending its shares down 6 percent in extended trade.

The company, whose brands include Plantronics and Clarity, forecast second-quarter adjusted earnings of 48 cents to 52 cents a share, excluding items, on revenue of $158 million to $163 million.

Analysts were looking for earnings of 50 cents a share, excluding items, on revenue of $167.7 million, according to Thomson Reuters I/B/E/S.

The second quarter typically shows a slowdown in incoming purchase orders during July which intensifies in August, especially for its higher margin OCC business, which includes corded and cordless communication headsets, the company said in a statement.

For the first quarter ended June 30, the company posted a net income from continuing operations of $25.9 million, or 52 cents a share, compared with a profit of $10.7 million, or 27 cents a share, a year ago.

Excluding items, the company earned 58 cents a share, ahead of analysts' estimates of earnings of 48 cents a share.

Revenue rose 21 percent to $170.7 million and beat analysts' estimates of $163.6 million. Revenue from its office and contact center business was $117.6 million, up 23 percent from last year.

Shares of the Santa Cruz, California-based company were down $1.86 at $31.50 in extended trade. They closed at $33.36 Monday on the New York Stock Exchange. (Reporting by Saqib Iqbal Ahmed in Bangalore; Editing by Aradhana Aravindan)