Amcom Telecommunications and Vocus Communications are preparing their legal teams to fight TPG Telecom through the West Australian courts after shareholders voted for their $1.2 billion merger.

Amcom shareholders on Monday beat TPG Telecom's attempt to scuttle their $1.2 billion merger with Vocus Communications. The companies wanted to join forces and become a national telecommunications powerhouse with the products and market share required to take on Telstra, Optus and TPG.

TPG subsequently tried to kill the deal by using its much-larger cash holdings to buy a 19.9 per cent blocking stake. This meant that over 75 per cent of Amcom shares that were not owned by TPG had to show up and vote in favour of the merger for it to win – most similar events only see a 50 to 70 per cent voter turnout.

Amcom shareholders created history by voting en masse in favour of the deal and against TPG – the first time a scheme of arrangement vote has succeeded in the face of such a large blocking stake.

More than 90 per cent of the proxy votes outside of TPG's holdings showed up and were in favour of the deal. The alternative would have seen Amcom wither on the vine because other would-be buyers would have faced the same problem.