ATM, Analysis Skills, Call Routing, Cisco Network Systems, Communication Skills, Customer Support/Service, Firewalls, Frame Relay, IP (Internet Protocol), IP (Internet Protocol) Routing, ISDN (Integrated Services Digital Network), Identify Issues, MPLS (Multi-Protocol Label Switching), Multilingual, Multitasking, Network Architecture/Engineering, Network Operations Center, Network Switching, On Call, Open Systems Interconnection (OSI), PSTN (Public Switched Telephone Network), Presentation/Verbal Skills, Problem Solving Skills, Protocol Analysis, Routing Protocols, SIP (Session Initiation Protocol), SS7, T-3 / DS3, TDM (Time Division Multiplexing), Telecommunications Industry, Testing, VoIP (Voice over IP), Writing Skills