Profilbillede af Asterisker
@Asterisker
Medlem siden 11. august 2016
4 Anbefalinger

Asterisker

Online Offline
Work with VoIP and PSTN, experience with the signaling protocols: SIP, SDP, RTP, IAX2, H323, SS7, TLS, SRTP. Interfaces DAHDI, AMI, AGI, PRI. Setting up and supporting Call centre, about 30 operators. Setting up VoIP using Asterisk, dialplan creating, developing Asterisk code, PHP, bash. Assisting developers with any service-related issues or feature requests. Jointly managing a network of 300 phones. Reporting based on CDR, CEL, queue_log database data. Configuring VoIP gateways Cisco, Addpac, Allvoip, Linksys, Snom, Polycom, GrandStream, D-Link, softphone Zoiper Communicator. PSTN ATS Panasonic KX-TDA100 KX-TDA200. Auto-provisioning with xml files via TFTP, HTTP, HTTPS protocols. Testing with sipp. Data quality for associated reporting systems. Configuring and monitoring VoIP equepment with Zabbix, Cacti, Monit, MRTG Extensive experience administering Linux servers. (Centos, Debian) . Services Apache, NGINX, DNS DHCP TFTP MySQL. Some experience with virtualization on VMware ESXi
$14 USD/hr
45 anmeldelser
5.0
  • 100%Jobs udført
  • 100%Indenfor Budget
  • 100%Til Tiden
  • 21%Genansættelsesfrekvens

Portfolio

Nylige bedømmelser

  • billede af i4net Bitrix integration $32.00 USD

    “sergei is very professional and dedicated programmer, he did the project on the best side and delivered the product working as asked. thanks a lot sergei .”

  • billede af EdRagimov FreePBX module $20.00 USD

    “Проект выполнен в срок и в рамках бюджета”

  • billede af Oguz E. Project 16499774 has been deleted $150.00 USD

    “Nice talking, friendly person, expert on voip business.”

  • billede af Camperage Fix Time/Date issues DST and American/Asutralian $94.00 AUD

    “Excellent Work... took a bit of time but Sergey spared no effort in finding a solution and he did!!. Will Hire Again Indeed.!! [26 February, 2018] Excellent Job on every time...!!! Very knowledgeable and reasonable priceing”

  • billede af Actus Project for Sergey S. $387.00 USD

    “very good”

  • billede af Miroslav L. Asterisk PBX in AWS €290.00 EUR

    “Very professional and polite person. Will hire him again if required.”

Erfaring

VoIP engineer

Nov 2014

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VoIP engineer

Jan 2011 - Nov 2014 (3 years)

Work with VoIP and PSTN, experience with the signaling protocols: SIP, SDP, RTP, IAX2, H323, SS7, TLS, SRTP. Interfaces DAHDI, AMI, AGI, PRI. Setting up and supporting Call centre, about 30 operators. Setting up VoIP using Asterisk, dialplan creating, developing Asterisk code, PHP, bash. Assisting developers with any service-related issues or feature requests. Jointly managing a network of 300 phones. Reporting based on CDR, CEL databases data.

Head of IT Department

Jul 2009 - Dec 2010 (1 year)

Administration of local corporate network in the city of Irkutsk. Work with equipment Cisco, D-link. Administration of the DNS, mail servers and billing running by Windows 2003 server, FreeBSD, RedHat. Knowledge of the basic routing protocols, TCP/IP protocol stack, as well as the principles of switching technology VLAN, VTP, STP.

CTO

Nov 2004 - Dec 2010 (6 years)

Participation in the project of constructing the optical transport network in the city of Irkutsk, maintenance of the existing operator's network. Administration of switches and routers of the company Cisco. Administration of the DNS, mail servers and billing running by Windows 2003 server, FreeBSD, RedHat. Knowledge of the basic routing protocols, TCP/IP protocol stack, as well as the principles of switching technology VLAN, VTP, STP.

Uddannelse

Bachelor's degree

1991 - 1996 (5 years)

Kvalifikationer

Certificate "Design networks" from company "D-Link Russia" (2012)

D-Link

network administration

Certificate "Design VoIP networks" from company "D-Link Russia" (2011)

D-Link

VoIP administration

Certificate "Asterisk. Level 2. The phone systems and securety" (2017)

Specialist

36 hours of lections and labs

Certificeringer

  • Unix Level 1
    95%
  • US English Level 1
    92%
  • Numeracy 1
    87%
  • Preferred Freelancer Program SLA
    84%

Verifikationer

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