Compared to ISDN, our SIP Trunk is cheaper on a per channel basis, more flexible in terms of what telephone numbers you can have, and quicker to install. It works by connecting your site using an IP circuit to carry and terminate your voice calls across the public telephone network. This can either replace or complement your current ISDN, and is designed to work successfully with all the leading IP PBX brands in the UK market. When installed together with ISDN it offers a very robust business continuity service, where two completely different technical solutions can be used together to carry your calls.

The benefits?

• FREE calls between your sites and lower cost calls overall compared to traditional telephony.
• Lower cost than ISDN, number presentation is included in the price, and DDI ranges are competitively priced.
• Scalable on a per channel basis unlike ISDN where you order in units of two.
• Easy to order and provision.
• Very flexible in terms of numbering. You can work from London on a Leeds number or vice versa. You can have 5 different geographical numbers on the same line to present a “UK wide” image without the overhead of different locations.
• Compliments a converged network with lower costs and simplified architecture.

SIP Trunks are suitable for a wide range of businesses through from small to large enterprises.