This service compliments or replaces your existing analogue or ISDN lines, connecting to your existing telephone system. Unlike ISDN lines, they can be enabled immediately and provide the same functionality at a substantially lower cost. You can also have any geographic number to suit your business and a unlimited number of lines. Our tariff is one of the most competitive available:   VoiceFlex BT Saving Setup £10.00 per line £125.001 92% Monthly rental £6.00 £15.00 60% Local call costs 1.4p 3p National call costs 1.4p 5p International       North America 1.4p 10p     France 1.4p 12p     Italy 1.9p 12p     Germany 1.6p 12p Other VoiceFlex Users Free 5p The number of SIP Trunks you need depends on the number of concurrent calls and the bandwidth of your internet connection. An average a BT ADSL internet connection will handle 6 SIP Trunks. A business SDSL will carry 24 SIP Trunks. This means you can make or receive 24 calls at the same time. Contact us for a more drtailed breakdown of your SIP needs. To start experiencing the excellent call quality and obvious saving 1 BT Costs cost per channel 1 year term contract for first 15 channels. £80 for a 3 – 5 year term contract. £0 per channel 3 – 5 year contact using BT Commitment