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Typical Applications

1 Signaling conversion/signaling gateway
　some telecom equipment from overseas can not communicate with the local telecom network. The versatile interfaces of SPAS programmable Switch support the comprehensive standards at lower cost, and help realize the conversion among R2MF, SS7, ISDN PRA, CAS, Access network V5X signaling.
　Voice codec may be incompatible when the interface of the input is different from that of the output. Multi-function signal tone board, in this case, can be used to realize the conversion of the voice codec. An example is the voice conversion between E1 A LAW and T1 U LAW.

2 Low cost remote multi-point access
　SPAS programmable Switch can support multi- module remote via E1. Many types of user interfaces including analog, DDN and FXO/FXS users can be attached to the remote modules with the adoption of SPAS-2000 SAS . SPAS provides accesses of signals externally through SPAS-2000 DTS and is adaptable for multi-point access networking at lower cost.

3 Virtual operator intelligent routing
　One IP telephone operator may have many partners globally, which may provide different services. In order to save costs and improve the quality of the services, IP telecom operators need to select intelligent call routing based on the time, rate, quality and the success rate. SPAS programmable Switch provides the programming interface for developing application level software using computers to help realize many advanced functions. Intelligent routing is one of the simple functions. SPAS may connect with IVR via E1 and many types of gateways at the same time, SPAS used for tandem.

4 CallCenter application
　SPAS programmable Switch supports CTI programming interface and can be used as the central ACD in the CallCenter system.

　　　　　　　　　　　　　　　　　Application Case Studies

1 Guiyang Mobile 1860, Hengyang Mobile 1860, Beijing Unicom 1001:Distributed signaling conversion
　As a signaling conversion equipment, SPAS realizes both way conversion between SS7 and PRA. 32E1x32E1 conversion is adopted by Guiyang Mobile. Since SPAS single module consists of 56 E1 in distributive manner, they can be scaled smoothly. SPAS can cascade up to4 modules to realize the signaling conversion of large capacity.
　Main module mainly deals with:
　> Information processing at the No. 7 MTP layer processing of TUP information and PRA information within this module
　> Distribution of TUP information to sub-component via Ethernet (100Base-T)
　> Receiving information from other sub-module via the Ethernet interface and sending it to the MTP layer
　Sub-module mainly deals with:
　> Receiving TUP information via Ethernet (100Base-T), carrying out call handling, and transferring to PRA
　> PRA call handling
　> Transmitting the TUP information to the Ethernet interface to be sent to remote end
　Independent call handling and routing are realized in each sub-module. Load balancing is achieved among the main MPU and the sub MPU, which improves the call handling capabilities greatly.
　　　　　　　

2 A virtual telecom operator: Virtual telecom operation business platform
　SPAS programmable Switch connects with CISCO 3530 gateway, HARRIS switch, and HuaweiCCO8 switch respectively. These switches belong to other operators connected with this operator, and routings and cost of the operators may be different. As a tandem switch, SPAS has 48 E1 and with PRA as the connection signaling. The calling controller may communicate with SPAS-2000 Switch via the programmable interface and control the flow, routing, billing and other personalization value-added services.

3 A Telecom operator:Voice conversion system between U LAW and A LAW
　SPAS connects with the switches in Guangzhou and H.K. respectively, both adopting PRA signaling. But T1 is used in H.K., E1 in Guangzhou. U LAW is the voice codec for T1 voice channel, whereas A LAW is the codec for E1. Apart from the PRA signaling conversion between E1 and T1, SPAS-2000 programmable Switch needs to also realize the voice conversion between U LAW and A LAW.