Freelancer logo How It Works Browse Jobs Log In Sign Up Post a Project
EXPLORE
Asterisk PBX MySQL Perl PHP Software Architecture
Profile cover photoundefined
You're now following .
Error following user.
This user does not allow users to follow them.
You are already following this user.
Your membership plan only allows 0 follows. Upgrade here.
Successfully unfollowed user.
Error unfollowing user.
You have successfully recommended
Error recommending user.
Something went wrong. Please refresh the page and try again.
Email successfully verified.
User Avatar
$120 USD / hour
Flag of UKRAINE
svitlovodsk, ukraine
$120 USD / hour
It's currently 11:39 PM here
Joined April 9, 2007
28 Recommendations

Olexander M.

@meral

monthly-level-three.svgpreferred-freelancer-v2.svg
4.9 (265 reviews)
8.5
8.5
$120 USD / hour
Flag of UKRAINE
svitlovodsk, ukraine
$120 USD / hour
100%
Jobs Completed
99%
On Budget
99%
On Time
22%
Repeat Hire Rate

Best VOIP Expert Available

I am working with asterisk more then 18 years. Have at least 15 years of extensive DEVELOPMENT work. My primary services are VoIP systems design, billing for VOIP, web for VoIP/reporting interfaces. I have compleated some autodiallers, including one with 20k concurrent calls, proved I can do complex modules for freepbx/trixbox, have done some a2billing contributions. Also I 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, I have near zero aborted projects, most of them from client-side. I have NO "work-in-progress-forever" list like a lot of users have. so the completion rate is REAL. The only thing I not do is graphical design work, I'm sorry, but it is hard to be professional in VoIP and design in the same time. I have choosed to be best in VOIP
Freelancer Asterisk PBX Developers Ukraine

Contact Olexander M. about your job

Log in to discuss any details over chat.

Portfolio Items

modified a2billing setup to do record of calls.

was installed a2billing.org software
created special changes and modules to support call recording
created modules to listen recording from web
full installation done, on my VPS.

design changes and initial page was done by client's side.
a2billing modification http://optag-opkald.dk
multiserver dialler with support of ivr
purpose: do surveys
support ivr with text-to-speach.
outbound dialler with ivr support
multiserver dialler with support of ivr
purpose: do surveys
support ivr with text-to-speach.
outbound dialler with ivr support
multiserver dialler with support of ivr
purpose: do surveys
support ivr with text-to-speach.
outbound dialler with ivr support
done by me:
   fax engine including inbound and outboudn faxing using t.38
   web interface
   full setup.
design provided by client.
inbound/outbound fax system for fax.c.is

Reviews

Changes saved
Showing 1 - 5 out of 50+ reviews
Filter reviews by: 5.0
$740.00 USD
Great job! Very knowledgeable and easy to work with.
System Admin Linux Asterisk PBX VoIP UNIX
V
Flag of Val M. @valentino55
26 days ago
5.0
$400.00 AUD
Brilliant work with FreePBX, knows his stuff.
System Admin Linux Asterisk PBX VoIP Network Administration
User Avatar
Flag of Liam B. @comcen
1 year ago
5.0
$250.00 CAD
Excellent guy to work with!
Linux Asterisk PBX VoIP
User Avatar
Flag of Khadim H. @khadimmail
2 years ago
4.8
$250.00 USD
it is always good
PHP Perl C Programming Python Asterisk PBX
+1 more
H
Flag of Burk H. @Hillburg
4 years ago
5.0
$285.00 USD
Great guy
PHP Perl C Programming Python Asterisk PBX
+1 more
S
Flag of Rob B. @starline250
5 years ago

Experience

master voip developer

UA Prime LTD
Mar 2003 - Present
Voip developer,work as freelancer. Working with complex voip system, virtualization, clustering.

voip developer

itmaster
May 2000 - Mar 2005 (4 years, 10 months)
Have created billing system for voip, voip support, dialup billing(internet access) system. Cisco, Asterisk, Sipura, Dlink, Polycom devices experience. Linux/Freebsd

Education

Specialist

Kyiv National Taras Shevchenko University, Ukraine 1999 - 2004
(5 years)

Bachelor\'s degree

Kyiv National Taras Shevchenko University, Ukraine 1999 - 2003
(4 years)

Qualifications

dCAA

Digium
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.

CISCO CERTIFIED NETWORK ASSOCIATE

cisco
2006
Cisco network level basic certification

Publications

Asterisk-support.ru

PBXWare.ru
Stackoverflow-like service, questions about asterisk/voip, top score profile http://asterisk-support.ru/users/159/meral/

Stackoverflow answers

SO
Top score on SO in asterisk category. http://stackoverflow.com/tags/asterisk/info (profile id is arheops)

articles about voip

asterisk-support.ru
FAQ/help for beginers

Contact Olexander M. about your job

Log in to discuss any details over chat.

Verifications

Preferred Freelancer
Identity Verified
Payment Verified
Phone Verified
Email Verified
Facebook Connected

Certifications

unix_1.png Unix 1 100% numeracy_1.png Basic Numeracy 1 98% general_orientation.png General Orientation Exam 1 90% preferredfreelancer-1.png Preferred Freelancer Program SLA 1 89% SQL_1.png SQL 1 83%

Top Skills

Asterisk PBX 197 PHP 144 MySQL 83 Software Architecture 32 Perl 30

Browse Similar Freelancers

Asterisk PBX Developers in Ukraine
Asterisk PBX Developers
PHP Developers
MySQL Developers

Browse Similar Showcases

Asterisk PBX
PHP
MySQL
Software Architecture
Previous User
Next User
Invite sent successfully!
Registered Users Total Jobs Posted
Freelancer ® is a registered Trademark of Freelancer Technology Pty Limited (ACN 142 189 759)
Copyright © 2023 Freelancer Technology Pty Limited (ACN 142 189 759)
Loading preview
Permission granted for Geolocation.
Your login session has expired and you have been logged out. Please log in again.