UPDATE 1-Plantronics Q2 beats market, gives strong Q3 EPS view

* Q2 adj EPS $0.40 vs est $0.31

* Q2 rev $167.4 mln, down 23 pct

* Sees adj Q3 EPS $0.38-$0.42 vs est $0.37/shr

Oct 27 (Reuters) - Headset maker Plantronics Inc (PLT.N) posted a quarterly profit that beat market estimates, helped by stable demand in its office & contact center business, and forecast third-quarter earnings above analysts' expectations.

The company, whose brands include Plantronics, Altec Lansing and Clarity, said it expects adjusted third-quarter earnings of 38 cents to 42 cents a share, on revenue of $155 million to $160 million.

Analysts on average were expecting earnings of 37 cents a share, on revenue of $164.2 million, according to Thomson Reuters I/B/E/S.

For the second quarter ended Sept. 30, the company posted a loss of $746,000, or 2 cents a share, compared with a profit of $17.6 million, or 36 cents a share, a year ago.

Excluding items, the company earned 40 cents a share, ahead of analysts' estimates of earnings of 31 cents a share.

Revenue fell 23 percent to $167.4 million but beat analysts' estimates of $155.1 million.

Revenue from its office & contact center business was $93.5 million, down 3 percent sequentially.

Shares of the Santa Cruz, California-based Plantronics closed at $24.87 Tuesday on Nasdaq. (Reporting by Saqib Iqbal Ahmed in Bangalore; Editing by Unnikrishnan Nair)