* Complaint against Telefonica CR over 'margin squeeze'
* Telecom group faces similar suit, anti-monopoly case (Adds Telefonica comment, background, shares)
PRAGUE, Sept 17 (Reuters) - Czech telecoms firm Ceske Radiokomunikace is suing Telefonica Czech Republic for 3.1 billion crowns ($167 million) for abusing its dominant position, Telefonica CR said on Monday.
"We cannot comment on ongoing proceedings, but anyone can file a suit and it is up to the authorities to decide if it is legitimate or not," said Hany Farghali, a spokesman for Telefonica CR - a unit of Spanish group Telefonica and the country's largest telecom group.
The suit follows a March 2011 complaint from Czech group Volny, which claimed damages worth 4 billion crowns for squeezed margins in the ADSL internet segments.
The Czech anti-monopoly office also has an open case against Telefonica CR relating to its dominant position in high-speed internet connections. Telefonica has said that the case dated back to 2005.
Telefonica CR shares were flat on the day at 384 crowns, outperforming a 0.9 percent drop in Prague's index.
Ceske Radiokomunikace is owned by Macquarie Group funds. It is a market leader in the radio service market and the first company to start public digital television broadcasting in the central European country. ($1 = 18.53 Czech crowns) (Reporting by Jason Hovet; Editing by Dan Lalor) (email@example.com; +420 224 190 476; Reuters Messaging: firstname.lastname@example.org)