For Skype, the line could be going dead.

At issue is a key piece of software code licensed to Skype by a company called Joltid. For months, Joltid and Skype have been scrapping over the legal rights to the code – and now, the battle has gotten serious enough that eBay, which owns Skype, is getting worried. If Skype loses the right to the software code, “Skype’s business as currently conducted would likely not be possible,” eBay said in a quarterly filing with the US Securities and Exchange Commission.