(Telecompaper) Cogeco Communications said that its Atlantic Broadband unit has agreed to buy all of MetroCast's brand name cable systems from Harron Communications for USD 1.4 billion. Cogeco said the deal will help the company expand in North America and further into the US cable market. Under the agreement, the Caisse de depot et placement du Quebec will invest USD 315 million for a 21 percent stake in Atlantic Broadband's holding company. The rest of the purchase price will be financed by secured debt financing from two banks.