ZXSS10 SS1b, the core device in Softswitch architecture, implements such functions of call control, media gateway access, routing, authentication, protocol processing, accounting, etc., independent of bottom bearer protocol.

Cooperating with an application server of SCP at the service layer, the ZXSS10 SS1b not only provides PSTN basic and supplementary services, but also provides multimedia, traditional IN, individual IP-based and value-added services.

Features

• Interoperable capability

• Flexible scalability

• Extensive service capability

• Perfect access capability with integrated devices

• Massive networking capability

• Manageability and operability

• High reliability

Applications

• Backbone data network for toll services

• Enterprise network for VoIP services

• Internet for IP value-added services

• Metropolitan network for local services

• Multimedia services

• Integrated IN services

• PSTN and IN interoperation services

Functions

• Processes basic and enhanced calls

• Protocol Adaptation

• Provides service platforms with an open and standard interface - supports future expansion

• Interconnects and interoperates with peers

• Supports accounting, authentication, maintenance, etc.

• Address resolution: Converts E.164 address to IP addresses

• Controls whether media gateway shall adopt voice compression and provides optional algorithms as necessary

• Provides strong dual-homing mechanism

• Centrally managed system resources such as resource allocation, release and control

Protocol Capability

• Call control protocols: ISUP, TUP over IP, SIP, SIP-T, SIP-I, H.323, BICC, V5.2, R2, PRA

• Transport control protocols: TCP, UDP, SCTP, TCAP/SCCP,  M3UA, M2UA, M2PA, IUA, V5UA

• Media control protocols: H.248/MEGACO, SIP, MGCP, NCS

• Service application protocols: INAP(CS2), LDAP, RADIUS, MAP

• Maintenance management protocols: SNMP, FTP, Telnet

Performance Capability

• System Capacity:
   Subscribers: 16,000,000 (max.)
   Trunks: 1,600,000 (max.)
   Signaling gateway numbers: 1000 (max.)
   Max number of signaling point: 1024
   Max number of signaling link: 1500 64k or 100 2M
   Media gateway numbers: 2 million
   Black/While list: 5 million
   Accuracy of billing: ≥ 99.9999% 
  Cascading frames: 8 (max.)

• Processing Capability:
  Single frame: BHCA: not less than 2M for subscribers (max.)
  Single system: BHCA: not less than 16M for subscribers (max.)

• Reliability:
   Recovery time: less than 5 minutes (max.)
   Annual failure time: 5.3 minutes (total)

Services

• Voice services: 100% with PSTN/ISDN basic and supplementary services

• Softswitch services: Wide area IP Centrex, Broadband IP phone bar services, etc.

• Integrated voice / data services: Click-to-dial, Web 800, Web conference, ONLY, prepaid, etc.

• Multimedia: Videophone, Video conference, SoftDA , etc.

• Cooperated with application server: Unified information,  Prepaid, Voice-mail, etc.