Configuration & Maintenance: Configure and maintain telecom systems including gateways, routers, switches, firewalls, DNS, DHCP, network servers, multiplexers, calling card platforms, TDM, Dialogic, and VoIP systems (SIP, H.323 protocols, dial peers, VoIP carrier trunking). Technical Expertise: Proficient in the configuration and maintenance of gateways, routers, switches, firewalls, DNS, DHCP, network servers, multiplexers, calling card platforms, TDM, Dialogic, and VoIP systems (SIP, H.323 protocols, dial peers, and VoIP carrier trunking).