StarTrinity.com

Measuring quality

StarTrinity VoIP software architecture - general view

The diagram shows internal structure of StarTrinity VoIP software products - modules, technical concepts, protocols, technologies. Only major modules are shown. Reason of publication of the diagram is to visually show software's main features on a single page, give links with details, and to make our software transparent for technical people.

Executables

SIP Tester desktop GUI

SIP Tester CLI

Unit Tests Launcher

Softswitch Windows Service: routing and billing engine

High-level
C# ViewModels
- modules, directly
connected with GUI

Low-level
runtime modules:
calls processing

System
libraries

Protocols

Call generator, scheduler

SIP call

SIP trace

Settings

Incoming, outgoing scripts

Log

Charts: 1, 2

Current calls list, CDR list

Summary reports for measured VoIP call quality indicators

Statistical probability distribution analyzers

Registrations, auth. credentials (UAC, UAS)

Web UI, REST API for ViewModels:
embedded web server,
web framework, AJAX

HTTP client for integration with 3rd party APIs

Packet Analyzer:

• SIP, RTP parser
• Jitter analyzer
• Packet loss analyzer
• RAM packets storage
• G.107 MOS E-model
• PCAP file reader, writer
• RTP→WAV decoder

CallXML script interpreter:

• Implementations of CallXML elements
• Parsers: XML, math. expressions, substitution, time

SIP stack:

• Softswitch Core
• INVITE UAC, UAS
• REGISTER UAC, UAS

CSV file reader, writer

T.38 fax module

Email alerter, reporter

Media stack:

• Media threads manager
• MGCP implementation: terms and connections
• Player: WAV, PCAP, MP3
• Recorder: WAV
• Audio verifier: exact match, PESQ
• G.711, G.723, G.729 codecs
• Mixer for conferences and recording
• SAPI5 text-to-speech player
• RTP jitter, loss impairments generator
• RTCP module

Settings (XML file)

Synchronization with cluster of servers

MSSQL DB connection

ODBC CDR export

File cache

.NET

WPF

WinPCAP

Windows Multimedia API

WinSockets

SAPI5 (text-to-speech)

.NET SQL client

ODBC drivers

WCF

Google Speech API
(voice recognition)

SIP

SDP

RTP

RTCP

SRTP

TCP

UDP

TLS

T.38/T.4

SMTP

SMB

DB connection protocols

HTTP