The Bulgarian National Bank (BNB) said that it has signed a 660,000 levs ($371,000/337,000 euro) agreement for the purchase of communications equipment with local Telelink Business Services. The contract also includes maintenance of the supplied equipment for a three-year period, the central bank said in a notice on Monday. The deal was signed on March 25, according to the notice. Two companies tabled offers in the tender for the contract. Telelink Business Services is a wholly-owned subsidiary of Telelink Business Services Group (TBS Group), which is currently seeking admission to trading on the Bulgarian Stock Exchange.