• Support 80 FXO/FXS or 20E1/T1 in A Single System

  • Hi-Scalability for Distributed and Centralized System

  • Soft Switching Technology Based on IP Networks

  • Hi-Scalability for Hosted and Cloud VoIP Application

In Mobile Internet Era with diverse and rapidly-growing needs of Instant Messaging, Synway SPBX adopts the latest NGN-IP SoftSwithing and opens a new milestone to maximize network value for SP and application developers. One of major advantage of softSwitching is its BLL and Control Layer’s  complete independence from equipment, which reduces time to market and introduces innovative applications more efficiently and effectively. Tailored to satisfy diverse customers’needs, softSwitching SPBX,with its open and standardized format,enables users to develop a range of applications.

The open architecture of Synway SPBX allows for standard protocols between different network components and ensures high independence and interoperability, which better caters to sophisticated communications. Also, in the Mobile Internet Era, SPBX brings about efficiency and unparalleled cost advantages for developers by optimizing R&D and integrating an array of data, voice, video and other applications. Compared with the legacy IP and TDM technology, SPBX embraces high availability and offers the thorough user-experience of multimedia applications for end-users, system developers and operators, with more cost-effectiveness and flexibility in Mobile Internet Era.

  • Highlights
  • Specifications
  • Resources

Softswitching Technology

Based on distributed switching/control layer, SPBX separates call controls from application layers, and could be seamlessly compliant with multiple communication devices and add applications on effortlessly.

Multimedia Convergence

Adopt 1000M-Ethernet switching chipset, SPBX’s media stream exchanges in IP packets, and access to softswitching system via Media Gateway Controller,ensuring high-level applications are streamlined.

High Scalability

Flattening architectures based on SoftSwitching ensures unlimited expandability from low density and high density. Modular design allows for easy configurations, system upgrading or general maintenance.

Diverse Media Resources

Support high-capacity voice playback and Codecs, conferencing, faxing and video; Support T.38/T.30; Set up Built-in IVR and ACD applications, with EXT IVR server or GUI management.

Standard TSAPI Interface

With standard TSAPI, the SPBX could be compatible with existing TSAPI-based call center and other applications, which greatly reduces development costs and shortens time to market.

Embedded Switching Application

SPBX possesses a complete range of switcher features, and helps set up efficient enterprise communication and call center systems,without developing any additional PBX software

Telco Grade Reliability

Dual power system with standby redundancy; Intelligent cooling system reassures telco robustness; Special ash cleaner protects against dust accumulation; Internal temperature controller and alerts

Multimedia & Signaling

Voice Processing

Support voice call recording (on-demand or permanent);

All voice channels could be converted to conferencing channels;

Two voice channels could be converted to a fax session on demand;

CODECs: support A-law, μ-law, PCM8, PCM16, IAM-ADPCM, VOX, MP3, GSM, G.729A, etc;

Voice file format: support standard WAV format file and any non-format file;

Support conversion among various (de)coding formats;

Support real-time file replay from RAM and server;

Support real-time recording to RAM and server (Dynamic Storage);

Support DTMF and FSK transmission/reception;

Support (standard/self-defined) tone transmission and detection;

Support R2 transmission and reception;

Support Barge-in function;

Support simultaneous recording/replay;

Compliant with G.168 echo cancellation, with up to 128ms tail length;

Support AGC/ALS;

Support Answer Machine Detection;

Support full-duplex recording and replay;

Signaling Protocols

E1/T1/J1: support R1, R2, CAS, SS7 and ISDN PRI;

Signaling interface: CAS supports MFC, R2 and so on; 

Signaling interface: SS7 supports MTP, TUP and ISUP, SCCP, TCAP, MAP;

Support signaling redundancy, changeover and reset; SS7/ISDN data links could be on any timeslot, not only on timeslot 16;

Support 96 64Kbps signaling links or 48 Hi-Speed Links;

Support calling distribution among signaling links or among signaling link groups;

Support call transfer among various signaling points or direct-connectivity mode;

Support multiple source signaling point-codes as well as projected signaling point-codes;

Support real-time signaling link’s adding, removing, activating, reset, normal setup, emergency setup, anti-congestion;

Support multiple signaling points and signaling point transference;

ISDN supports network terminal and subscriber terminal;

Support overlapping in reception/transmission of called number;

VoIP Resources

RTP Protocol

Compliant with RTP/RTCP protocol (RFC3551, RFC3552);

Coding/Decoding: G.711(A-law/μ-law)/GSM/G.729A;

Self-adaptive echo cancellation (voice enhancement);

RTP DTMF loading (RFC2833);

Support NAT/Firewall monitoring and tunneling;

SIP Protocol

Supported SIP standards:

IETF RFC 3261 (SIP: Session Initiation Protocol);

IETF RFC 2327 (SDP–Session Description Protocol);

IETF RFC 3550 and 3551 (RTP/RTCP);


SIP Protocol Stacks

Support signaling transmitting over UDP;

Support call holding;

Support Digest Authentication;

Intelligent URL Scheme analysis algorithm;

Support INVITE/RElNVITE in calling processing;

Support VIA rPort setting (for NAT/Firewall tunneling);

Support REFER call forwarding;

Allow DTMF tone transmission/detection in three modes: inner-band/SIP-INFO/out-of-band (RFC2833);

Support REGISTER messaging and authentication;

Inner multiple-threads mechanism;

Support SIP server;

Support UDP “pulse-holding” mechanism;

Support INFO messaging;

Conference/Fax resource

Support distributed conferencing mode, with conferencing resource in each voice channel;

Fully support SIP-based Fax T.38 standard;

Support V29/V27/V17 standards, with faxing rate up to 33.6Kbps (automatically slowing down);

Support ECM (Fax/Error Correction Mode) for reception/transmission (optional for EXM/non-ECM mode);

Support TIFF files input in MH/MR/MMR format and transmission/reception in MH, MR format;