Subscribing for the SIP Trunking service businesses can integrate their IP based PBXs and extensions with operator’s network over an IP connection. The IP connection between the customer and the operator’s network comprises multiple voice/fax sessions depending on the enterprise needs.

SIP Business Trunking solution allows operators to attract corporate customers with new services and benefits. Customer’s extensions behind the PBX have connectivity to the public networks and can now be integrated with customer’s employees’ mobile phones in a common numbering plan. The operator can also add a rich set of integrated IP Centrex services to both mobile phones and PBX extensions of corporate customers on top of SIP Business Trunking solution.

The service allows businesses to use a single broadband connection for both voice and data traffic, which eliminates the need for dedicated trunk facilities, lowers telephony costs, and greatly improves the communications experience for users.

Applicata proposes its SIP Business Trunking solution that replaces the conventional ISDN trunking with broadband IP packet based trunking. It brings new opportunities for opening new markets, providing additional value added services, revenue generation and lowering operational costs.

The solution supports SIP or H.323 connectivity between the service provider’s IMS network and enterprise IP PBXs. Legacy circuit switched PBXs are supported by adding SIP Gateways. Clusters of PBXs are supported behind SIP Redirect and Proxy servers. Connections between the service provider and enterprises are secured by tunnelling over the normal infrastructure using VPN or IPSec.

The solution collaborates natively with other nodes in the IMS core—SBC, S-CSCF, HSS, MGC/MGW, MS in providing the SIP Business Trunking service. Being part of IMS architecture it integrates easily with other services in the service provider’s network: Voice Mail, Coloured Ringback tones, Converged VPN, Multiringing and MultiSIM, Network Presence, Billing, etc

• Use the SBT service as base for entering a whole new market opportunities
• Offer additional services to the new and existing subscribers
• Have flexibility for targeting small and big business customers
• Gain competitive advantage from traditional and alternative operators
• Improve corporate customers’ loyalty and increase ARPU figures

• Save on line rental costs compared to traditional ISDN lines, increase resiliency
• Re-use broadband infrastructure with multiple services
• Enjoy rich set of new convergent integrated services and call routing options
• Keep the existing phone numbers
• Integrate fixed extensions and mobile numbers in common numbering plan
• Apply flexible and manageable control over mobile subscriptions
• Have a single account for billing, maintenance and service assurance