Profile image of meral
Flag of Ukraine Svitlovodsk, Ukraine
Member since April, 2007
10 Recommendations

Alexander Merkulov 

We are working with asterisk more then 15 years. Have only linux admins with 20+ years experience in team and asterisk expert with at least 10 years of extensive DEVELOPMENT work. Our primary services are voip systems design , billing for VOIP, web for voip/reporting interfaces. We have done some autodiallers, proved we can do complex modules for freepbx/trixbox, we have a2billing contributors in team. Also we have experience with multi-server voip clusters end virtualized voip services,including ones in amazon ec2. -small and large VOIP system based on SIP protocol -general voip architecture design -web and billing for voip -support for asterisk, freepbx/trixbox and a2billing, openser/kamailio/opensips. -modules and addons for asterisk, freepbx, a2billing -load balance using openser/kamailio/opensips -virtualization with openvz, xen, amazon ec2 service. -support for linux systems and supply services for voip. -create network storage clusters, mysql replicated setup, mysql-clustered experience -per hour support and consulting for all above every finished project have free limited 10 day support&bugfixes. note, we have very few aborted projects, most of them from client side. We have NO "work-in-progress-forever" list like alot of users have. so completion rate is REAL. Only thing we not do is graphical design work, we are sorry but it is hard to be proffessional in voip and design in same time. We are choosing be best in VOIP
$60 USD/hr
243 reviews
  • 90%Jobs Completed
  • 99%On Budget
  • 98%On Time
  • 22%Repeat Hire Rate

Recent Reviews


master voip developer

Mar 2003

Voip developer,work as freelancer. Working with complex voip system, virtualization, clustering.

voip developer

May 2000 - Mar 2005 (4 years)

Have created billing system for voip, voip support, dialup billing(internet access) system. Cisco, Asterisk, Sipura, Dlink, Polycom devices experience. Linux/Freebsd



1999 - 2004 (5 years)

Bachelor\'s degree

1999 - 2003 (4 years)




Cisco network level basic certification

dCAA (2012)


The Digium Certified Asterisk Administrator (dCAA) program is intended to validate basic competency with Asterisk. It requires general telephony and VoIP knowledge as well as specific Asterisk knowledge related to installing, configuring, and administering an Asterisk system. Digium Certified Asterisk Administrator certification is awarded after earning a passing score on the dCAA examination.


articles about voip

FAQ/help for beginers

Stackoverflow answers

Top score on SO in asterisk category. (profile id is arheops)

Stackoverflow-like service, questions about asterisk/voip, top score profile