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CenterStage NX Series

CenterStage NX5000/NX5100

CenterStage NX5000/NX5100 overview

The CenterStage NX5000 and NX5100 are communications servers designed for large-scale carriers and optimized to serve as a foundation for Next Generation Network(*1)(NGN) services.

CenterStage HAPF (OKI's proprietary high-availability(*2) middleware) delivers the high level of availability and performance demanded by NGN, cutting maintenance and management costs with high 99.9999% availability, call processing performance that reaches 1 million busy hour call attempts (BHCA), and 800,000 subscriber capacity (per server). New functionality preserves the conventional softswitch architecture while enhancing call session control functions in IMS to effect a transformation from softswitch to CSCF (Call Session Control Function) in preparation for the advent of true NGN.

The NX5000 implements functionality defined by I-CSCF, S-CSCF, and BGCF, while the NX5100 provides functionality defined by P-CSCF. These capabilities dramatically simplify not only audio, video, and data session control but also the transition from conventional IP phone networks to NGN.

CenterStage NX5000/NX5100 scope

Implementing PSTN/ISDN simulation over NGN

Using the CenterStage HAPF platform, OKI has implemented audio services and applications similar to those provided by public telephone service. In addition to PSTN/ISDN simulation(*3) on NGN, this capability enables PSTN/ISDN emulation(*4).

Support for future services with ISC interfaces

CenterStage now includes improved support for ISC interfaces(*5) defined by groups such as 3GPP(*6) in the IMS(*7) standard. This capability will allow new and future services such as push to talk over cellular(*8) and multimedia instant messaging as well as FMC(*9)-related services to be supported through linkages with application servers such as OKI's SipAs™ on WebLogic, an application server that fuses IT and communications.

CenterStage HAPF

The CenterStage NX Series applies CenterStage HAPF (OKI's proprietary high-availability middleware) to deliver the exceptional performance, capacity, and reliability demanded by NGN.

  • *1NGN(Next Generation Networks)

    A next-generation network architecture for which the ITU-T is currently developing the specification. Based on the Internet Protocol (IP), this next-generation communications network assumes the enhancement and expansion of IP networks and incorporates conditions such as QoS and the separation of service and transport functions. NGN standardization efforts at the ITU-T began with Study Group 13 (SG13) during the second half of the last session (2000 to 2003). Intensive consideration of the technology continues today based on an organization known as FG-NGN (Focus Group on NGN), which was created in 2004 to accelerate the consideration of NGN specifications.

  • *2HA(High Availability)

    A system that stays operational for a high percentage of the time. Carrier-grade systems are required to provide 99.9999% reliability (about 33 seconds of down time each year).

  • *3PSTN/ISDN Simulation

    Service using an IP phone adapter that is roughly equivalent to conventional public fixed phone service.

  • *4PSTN/ISDN Emulation

    Service that does not differ from conventional public fixed phone service.

  • *5ISC (IMS Service Control) Interface

    Interface for controlling services over IMS (IP Multimedia Subsystem, a MMD [Multimedia Domain] in 3GPP2), which 3GPP is working to standardize.

  • *63GPP(3rd Generation Partnership Project)

    Industry group charged with standardizing the third-generation (3G) mobile communications system. 3GPP was formed in December 1998 with a core membership of communications standards organizations consisting of ETSI and T1 in Europe and the U.S., ARIB and TTC in Japan, TTA in South Korea, and CWTS in China. OKI Electric has a seat as a member of TTC (Telecommunication Technology Committee).http://www.3gpp.org/

  • *7IMS(IP Multimedia Subsystem)

    Specification defining a platform for providing audio, video, and data services on an all-IP mobile core network as standardized by 3GPP. IMS is seen as a standard platform for both mobile and fixed networks.

  • *8Push to Talk over Cellular

    Service allowing mobile handsets to be used as transceivers, with parties alternatively pressing a button to transmit audio. Push to talk over cellular is supported by IMS-compliant systems an initial IMS service.

  • *9FMC (Fixed and Mobile Convergence)

    Service that combines fixed and mobile telephony.

  • *Company and product names appearing on this page are the trademarks or registered trademarks of their respective owners.

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