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SS7 to ISDN protocol converterSS7 to ISDN PRI Protocol Converter

“The SS7 to ISDN PRI Protocol Converter product provides cost-effective, scaleable SS7 to ISDN PRI conversion with optional R2 / CAS signalling support, allowing carriers to benefit integrating into an SS7 network”

SS7 to ISDN PRI Protocol Converter SVI9225_1000

SS7 to ISDN Protocol Converter

  • Single box SS7 to ISDN solution with R2 CAS support
  • Scales from 2E1s to 72E1s, upgrade path 4E1, 8E1, E1/T1 interfaces
  • Supports 1+1 Redundancy
  • PCI Form Factor
  • Delivered in 1U, 2U and 4U PCI 19’ Telco Grade Chassis’
  • Typically deployed by wholesale carriers and ISP’s in 4, 8 and 16 E1 configurations to deliver reliable, high quality voice traffic between SS7 and ISDN networks

SS7 to ISDN PRI Protocol Converter


The SVI_9225 SS7 to ISDN PRI protocol converter is supplied as standard with the following functionality :-

Intelligent Call Routing

Intelligent call routing

Incoming Calls Routed based on

  • Called and Calling Party Information
  • Protocol Information
  • Originating Network
    • Trunk Group
    • Hunt Group (VoIP and TDM)
    • VoIP Destination
    • Protocol
  • Time Of Day
  • Cost Of Route

Outgoing Call Manipulation

  • Called and Calling Party Information
  • Protocol Information

Enhanced Call Completion Algorithms

  • Reattempt call
    • Same destination and/or different destinations
    • Reattempt based on call failure reason
  • Load share across different destinations
    • Hunt high, low, odd, even, incremental, decremental, percentage, ASR


  • Reject Call with Protocol Reason
  • Reject Call with announcement

SS7 MTP Configurations

At the core is a comprehensive and configurable SS7 to ISDN PRI routing engine with both A and F link support. This allows complex routing to be configured and enabling the sophisticated routing of any protocol/circuit to any protocol/circuit.

MTP configurations


  • ITU-T Q.701-707
  • ANSI T1-111.1-111.8
  • Chinese GF 001-9001
  • PNO-ISC/SPEC/005


  • 128 Signalling Links
  • 32 Originating Pointcodes
  • 128 Linksets
  • 1024 Destination Pointcodes

Operation, Administration and Maintenance (OA&M)

Web based GUI

Web Based GUI

The globally deployed SVI platform empowers its users with an advanced level of expertise and functionality.

Building upon the SVI command line interface the web based GUI brings the user powerful tools to manage system resources, ensuring swift new user adoption and delivering a real-time OA&M, offering:

  • Dashboard interface
  • Wizard library
  • Customisation - via XML
  • Secure multi-user features
  • Extensive help resources
  • Compatibility with the entire SVI range


Real time system setup, onboard resource and call routing management


Comprehensive statistical service monitoring and system status tool


Rapid tracing, diagnosing and CDR analysis compatible with Wireshark and Ethereal

Command line interface

Command Line Interface

Expert user tools accessed through wide vocabulary of command line queries via high speed MMI interface.


  • High speed real time configuration
  • Full ‘secure’ remote access


  • Low Level MMI Interface
  • Full onboard database inspection and control
  • Real time resource status display
  • Controlling system recourses


  • Configurable logfiles, capturing all aspects of system performance
  • Compatible with Wireshark and Ethereal for full graphical protocol traces


  • Extensive onboard CDRs and statistics generation
  • Call minutes, ASR, PDD, ACD, etc
  • Resource Statistics
  • Trap Reports Network

Network Monitoring

  • Trap capture
  • Statistic monitoring, graphing and alarming

Billing Interfaces

Billing interfaces

Call Data Records

  • On board CSV files contains all call attempts
  • Over 36 fields of call information

FTP Server

  • Client or Server controlled CDR retrieval


  • Full AAA support (Authentication, Authorisation and Accounting) support
  • Integrated with many Third party RADIUS


  • Direct writing of CDRs to client’s SQL database


1+ 1 Dual Plane Worker / Hot Standby

  • Database and signalling information check pointed between planes
  • Replicated Hardware and Software

Maintain calls in answer on failover

Eliminates Single Points Of Failure

Five Nines up time (99.999)

Single Point code spread across dual plane architecture

Real Time Maintenance Upgrades


  • 1+1 Dual Plane Redundancy
  • Hot Swap PSU, Fans


External Routing APIs

External routing APIs

External Routing APIs allow for customers to fully control routing through their own applications


  • SVI calls SQL stored procedures into customers SQL database, which returns routing information
  • PostgreSQL and MYSQL support


  • RADIUS Authorisation response contains routing information




  • Integrated Firewall
  • Username, password protected
  • Secure external protocols used for access (SSH, SCP)
  • Reports on unauthorised access
  • Client challenge procedures