The company, whose parent, the Telecom Group, has a 19.9 percent stake in H3GA and a seat on the H3GA board, claimed in a statement the deal would give it "undeniable advantages in the hotly contested business market".
A spokesperson for AAPT said while the deal initially involved reselling H3GA services, it may rebrand the offerings at a later date.
The company recently started offering flat-rate priced voice over Internet Protocol services.