Nice to meet you here

My name's Konstantin, I'm a senior software/VoIP engineer (CV).
I've been working as a freelancer and designing solutions in the field of communications (Telephony, VoIP, DVB, etc).
This site contains various projects of mine and the place for downloads, updates and documentations.
For ideas, job offers or product purchasing, please visit a contact page.

Products

• sttd

  High performance, easy to use, multilingual, neural based Speech-to-Text system.
  Allows to arrange a complete local Text-to-Speech service on regular servers.

• ttsd

  High performance, easy to use, multilingual, neural based Text-to-Speech system.
  Allows to arrange a complete local Speech-to-Tpeech service on regular servers.

• emPBX

  Lightweight software PBX based on libRE and Baresip.
  Designed to be used as a basis for developing small and portable VoIP applications.

• wIM

  Small and portable instant messenger serve based on XMPP protocol.
  Lightweight solution to arrange intercom communications, initially was written for my needs.
  

---

• sIVR

  Freeswitch module that allows to arrange user interaction through old plain IVR.
  Provides web based management interface, visual designer, voice input and menu speaking.
  

• xConf

  High performance and resource saving conference module for Freeswitch.
  Allows to arrange audio/video conferences with chat supports over SIP/WebRTC.

• QuickJS module

  Fast and lightweight alternative for mod_v8 / mod_spidermonkey.

• Freeswitch TTS modules

  Collection of Text-to-Speech modules for integration with TTS services. (OpenAI, Google, etc)

• Freeswitch STT modules

  Collection of Speech-to-Text modules for integration with STT services. (OpenAI, Google, etc)

Research and experimental projects

• tSIP

  The software to arrange secured telephone communications over analog (PSTN) or digital (VoIP) channels.
  Experiments with analog scrambling and attempt to create something similar to Gretacoder, but in software

• HATS (Home Amateur Telephone Service)

  The goal was to create private telephone service using regular (and specialized) HAM equipments.
  Experiments with VoIP, codecs, narrow/wide bandwidth and so on...
  

• bigEAR

  I've been always interested in spacecraft and Deep Space Communications (NASA DSN) and reading another articles, I wandered, is it possible to hear the Voyagers through inexpensive satellite equipment (2m parabolic dishes, for example)...

Other projects

• Inventory

  RFID based tracking / inventory system

• Renesas chips utilities

  Utilities for reprogramming Renesas's SoC (R8C, RL78, ...)

• Old projects and my GitHUB