Broadband virtual private network signalling

In the corporate voice networks, the virtual private network (VPN) configuration is particularly useful where a shaved network infrastructure can be more cost effective and flexible than dedicated leased lines. Current standards for VPN use the international narrowband private signalling system QSIG. Private network signalling standards for broadband networks are also developing rapidly and one can expect that the new emerging signalling systems such as ECMA's BQSIG and ATM Forum's PNNI will play a leading role in the broadband VPN in the future.