Consulting

Business solutions by foobar




Telecommunication, IP Centrex, VoIP

Project description:

Development of a IP Centrex (internet telephon system) solution medium-sized provider.

Environment:

Linux, Asterisk, OperSER, MySQL

Project content:
  • Configuration and customisation of the OpenSource components.
  • Development of services for configuration and administration of the system, e.g. control of Asterisk administration interfaces.
We:
  • Configuration of OpenSER, Routing to Asterisk and back.
  • Receiving, treatment and storage (MySQL) of Asterisk events.
  • Configuration tools

Telecommunication, VoIP domain

Project description:

Development of a large VoIP solution based on OpenSource software

Environment:

Linux, PostgreSQL (Cluster), OpenLDAP (HA with DRBD), FreeRadius

Project content:
  • Collaboration in a large development team, that included the OpenSource software OpenSER as base component in a scalable solution.
  • Connection of the supporting systems (PostgreSQL, OpenLDAP, freeradius) and customisation/development of the required interfaces.
  • Integration of high availability for the whole system (DRBD, PostgreSQL Replication, automatic failover with heartbeat)
We:
  • Software development and Customisation (C) in OpenSER (among others LDAP module, adaption of the Radius interface)
  • Implementation of the complex routing logic within OpenSER (conditional and unconditional forward, authentification, loop detection)
  • PostgreSQL in a PGCluster (several patches for PGCluster, configuration)
  • automatic configuration of the operating system (Debian Linux) and the components.

Telecommunication, Unified Messaging System

Project description:

Development of a large unified messaging system for a provider.

Environment:

Linux, GFS (connected by Fiberchannel), OpenLDAP

Project content:
  • Collaboration in a large development team, used the OpenSource software qmail as central component for the system and adapted it to the customers special wishes.
  • Configuration and customisation of the supporting systems (OpenLDAP, IMAP and POP).
  • High availability by GFS and heartbeat.
  • Automatic configuration of the operating system (RedHat Linux) and the components.
We:
  • Customisations in qmail and the POP/IMAP server (C).
  • Scripting of tools for configurations and monitoring.
  • Configuration of heartbeat.
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