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Sergey K. | Elance
 
176985602337900
Last Sign-in: Dec 16, 2016

Sergey K.

Hands-on VoIP, Networking, Telephony
   United States
  |   Brooklyn, NY
  |  8:04 am Local Time

Overview

Broad skills including: VoIP (SIP, RTP), call control, audio/video codecs, PSTN, WebRTC.

Integration/configuration/coding of Telephony software apps and drivers. Programming on C, C++, JavaScript, PHP, Perl, SQL.

Protocols and hardware debugging in VoIP, TDM, PBX, IVR, ISDN, SS7, RTP over NAT systems from small home business to enterprise. Troubleshooting using Wireshark, tcpdump, memory traces, log analysis and special programming tools/technique.

Telecom and networking equipment installation for real-time, media processing and...

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Nov 25, 2015|Other IT & Programming|Private|Working
Sep 14, 2015|Other IT & Programming|Private|Completed
|
5.0
Aug 22, 2015|Software Application|Private|Completed
|
5.0
Aug 2, 2015|Software Application|Private|Completed

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Portfolio

http://www.teq1systems.com/webrtc/

Skills (10)

Tested
C++
My Score
avg
Passed
VoIP
TDM
PSTN
PBX
Telephony
TCP/IP
My Score
avg
Passed
Linux
My Score
avg
Passed

Service Description

Everything related to Telephony, VoIP (SIP, H.323, RTP), call control (1PCC, 3PCC), codecs, TDM, ISDN, WebRTC, SS7: programming, configuration, integration, debugging, inter-op.

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Employment

Telecom/Telephony - Contractor/Consultant
Freelancer
2015 - 2015
VoIP, SIP, RTP, digital and analog telephony, signalling, media, WebRTC, networking, PBX, PSTN, protocols, codecs, programming (C/C++, Perl, PHP, JavaScript).
Comcast, Philadelphia, PA
Contractor
2014 - 2014
• Developed tools for emulation and back-to-back testing of VoIP calls between set-top boxes and WebRTC backend server infrastructure. • Implemented software with third-party tool integration for...
Dialogic Inc., Parsippany, NJ
Software Engineer
2007 - 2014
• Daily sustaining engineering tasks solving customer’s issues with VoIP, including: initial triage, reproduction customer cases with software/hardware, implementation fixes, unit and regression...
City of New York
Consultant
2005 - 2007
• Project to upgrade Department Computer Telephony distributed phone system with call control and voice recording (IVR), including migration to Windows servers, implementation of software and...
EZTel, New York, NY
Contractor
2005 - 2005
• Develop algorithms of Least Cost Routing calculation for wholesale VoIP traffic with programming/scripting, database, and web interface (LAMP). This solution had immediate monetary effect and...
American Communication Systems, Brooklyn, NY
Software Engineer
2001 - 2005
• From the ground up designed and implemented E-commerce Web-frontend system for customers of land-mobile radio communication equipment worldwide. • Worked in a team of 6 offshore developers using...
IT Contractor
overseas projects
1995 - 2001
• Developed software for regional telecom carriers: Network Management System (using SNMP) based on Solaris using HP OpenView and SQL database. (C and C++) • Developed visual forms and batch...

Education

Technical university
MS Systems Engineering
1989 - 1995
Overview  |  Job History  |  Portfolio  |  Resume/C.V.

Keywords

SIP H.323 RTP IVR ISDN PBX VoIP Telephony Telecom TDM PSTN ISDN Linux Windows WebRTC SS7
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Elance Level
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  • 12 months
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Private
Private
Total
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Identity
Username
TeqSystems
Type
Individual
Member Since
January 2015
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Sergey K. | Elance

Sergey K.