Design, development, implementation and support of a non-standard solution for VOIP traffic termination
The scope of responsibility covered:
-Selection of suitable technologies;
-Design of system architecture;
-Leading a development team
-Server part programming, low-level programming (including modification of the Ubuntu kernel, reverse engineering of ARM processor code)
When choosing technologies, the key factors were
-Highly loaded system
- Fault-tolerant solution (downtime is unacceptable)
- Load requirements
-Cost of specialists (development and implementation)
-Cost of equipment
Technology stack:
Ubuntu Server 14.04 LTS, Astreisk, php, c++/gcc, nginx, php-fpm, Google Speech API, MySQL, SIP/RTP, H323, mikrotik, e171/e173/e1550, simbank, goip, Raid, bcache, bonding (mirroring , master, slave)
OpenVPN TAP UDP, ARM assembler/IDA-pro, 3G
Result:
The system was successfully installed in 5 locations.
In each location there were up to 96 simultaneous terminating 3G connections at a peak.
The company made a solid profit.