Image de profil de Asterisker
@Asterisker
Membre depuis le 11 août 2016
4 Recommendations

Asterisker

En ligne Hors ligne
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 commentaires
5.0
  • 100%Travaux complétés
  • 100%Selon le budget
  • 100%Dans les temps
  • 21%Taux de Réembauche

Portfolio

Avis récents

  • image de 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 .”

  • image de EdRagimov FreePBX module $20.00 USD

    “Проект выполнен в срок и в рамках бюджета”

  • image de Oguz E. Project 16499774 has been deleted $150.00 USD

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

  • image de 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”

  • image de Actus Project for Sergey S. $387.00 USD

    “very good”

  • image de Miroslav L. Asterisk PBX in AWS €290.00 EUR

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

Expérience

VoIP engineer

Nov 2014

[login to view URL]

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.

Éducation

Bachelor's degree

1991 - 1996 (5 years)

Qualifications

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

Certifications

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

Vérifications

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