One of the key business drivers and hottest technologies in the enterprise space today is SIP and SIP trunks. Most Service Providers now offer enterprise customers a migration path from traditional PRIs to IP-based SIP trunks. The following benefits have been noted as drivers for this transition:

1. Reduce facilities costs – lower cost SIP trunks vs PRI
2. Centralized trunking into the data centers yields significant cost savings
3. Replacement of PRI with a more manageable SIP interface with remote monitoring capabilities
4. PBX feature interoperability (transfer, call waiting, park/pickup, etc.) across disparate locations
5. Accelerate acceptance of integrated voice and data facilities
6. Facilitate increased potential for On-Net traffic
7. Enhance disaster recovery and business continuity via data centric SIP solutions
8. Ability to introduce additional enhanced voice, video, multi-media and multi-modal services

There are challenges with SIP interoperability and PBX provisioning and configuration management can impede the deployment of SIP Trunking. Atlas has developed and deployed a SIP Trunking Interoperability program providing platform integration with the market leading IP PBXs/Centrex systems, Firewalls, SBCs and PSTN gateways.