/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: VladimirAstafiev https://cdn.slidesharecdn.com/profile-photo-VladimirAstafiev-48x48.jpg?cb=1522976685 Over 15 years of experience in IT and Telecommunications industries. Experienced in Roaming, CAMEL, GSM/3G technologies, VOIP and PSTN Telephony. High-scale, high load system optimization and tuning, clustering, Hiper-V, VirtualBox cloud services Corporate network infrastructure & services (Firewall, DNS, VPN, Mail, WEB, SQL, NAS, Backup, Monitoring, Log Analysis, Statistics, Accounting, Optimization, Security control & tracking, segmentation, and security perimeter control). Linux, Solaris high load system installation, optimization, support. Specialties: IP, SS7, H323/SIP, Roaming/CAMEL/SMS Hubbing. Kamailio, Freeswitch Cisco Certified Design and Network Professional