Hi Ry,
If I understand your question correctly, you would like to run two VoIP lines off the HG2700, taking your total number of lines to 8.
You can do this with ‘Broadband Voice’, our standard business VoIP package. Find out more about Broadband Voice.
Cost benefits include cheap line rental and capped international rates.
If you select the ‘Broadband Voice Plus’ tariff, your local and national calls are free (subject to the fair use policy) and you can also currently select a free geographic number to apply to your VoIP line.
Due to the large range of PBX and switch systems in the market, BT is unable to currently offer support on using these 3rd party products with Broadband Voice.