IP Centrex/Pabx is a set of specialized business solutions (primarily, but not exclusively, for voice service) where the equipment providing the call control and service logic functions is owned and operated by the service provider and hence is located on the service provider\'s premises.
Since Centrex/IP Pabx frees the customer from the costs and responsibilities of major equipment ownership, Centrex can be thought of as an outsourcing solution.
Call control and service logic refer collectively to the functions needed to process a telephone call and offer telephone features.
The following are examples of call control and service logic functions:
IP pabx and IP centrex Functions
recognizing when the called party answers the phone and when either party subsequently hangs up, and recording the appropriate information for billing
recognizing that a party has gone off hook and that dial tone should be provided
determining whether the called party is available, busy, or has call forwarding, and then applying the appropriate treatment (e.g., ringing the phone, applying busy signal, applying a call waiting tone, delivering the call to voicemail, or forwarding the call to another party)
interpreting the dialed digits to determine where the call is to terminated
In traditional Centrex /pabx service (i.e., analog Centrex and ISDN Centrex, IP Pabx), call control and service logic reside in a Class 5 switch located in the Central Office. The Class 5 switch is also responsibility for transporting and switching the electrical signals that carry the callers\' speech or other information (e.g., faxes). Traditional Centrex service has a number of benefits that are discussed elsewhere on this site.
IP Centrex /pabx service is driving a compelling value proposition offering many benefits over traditional PBX and Centrex services. Business customers are attracted to extensive PBX-like call features, broad support of both legacy and IP devices, and self-management of their VPN configuration and features through web-based GUIs. CIOs are attracted to the capital and ongoing cost savings associated with outsourcing their IP-based voice services to a trusted service provider. Meanwhile, service providers are drawn to the cost-efficiencies of an IP infrastructure, differentiated features and functionality, and easy application deployment.
PowerTech support a broad range of IP Centrex media processing capabilities with carrier-class scalability and reliability. PowerTech servers, under the control of an IP Centrex application server, support a full range of VoIP media processing requirements for robust IP-based Centrex solutions. In addition, the voiceXML script processing capability supports complex IVR dialogs applicable to many IP Centrex features.
PowerTech’s integrated processing features provide a cornerstone to carrier scale IP Centrex /Pabx deployments including:
IP Centrex/Pabx Services Included:
Dynamically generated announcements (e.g. date or account balance)
Audio conference bridging and mixing
Customizable, multi-language announcements
DTMF tone detection and generation (both inband)
Digit collection for IVR control of IP Centrex features and capabilities