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 Freeswitch, Asterisk, Kamailio, dialplan creating, developing FreePBX module code, PHP, bash. Assisting developers with any service-related issues or feature requests. Reporting based on CDR, CEL, queue_log database data.
Configuring VoIP gateways Cisco, Addpac, Linksys, Snom, Polycom, GrandStream. PSTN ATS Panasonic KX-TDA.
Auto-provisioning with xml files via TFTP, HTTP, HTTPS protocols with own Web GUI. Testing with SIPp.
Debuging with Voipmonitor, Homer, sngrep, tshark.
Data quality for associated reporting systems.
Configuring and monitoring VoIP equepment with Zabbix, Nagios, Monit, MRTG
Extensive experience administering Linux [login to view URL] Apache, NGINX, DNS DHCP TFTP MySQL. Some experience with virtualization on VMware ESXi