Unified Communications & Enterprise Telephony: Deep proficiency in Cisco Unified Communications Manager (CUCM), Cisco Unity, CUP, Expressway, Microsoft Teams Direct Routing, Microsoft Operator Connect, and Team Phone Mobile.

SBC & Open-Source SBC Specialization: Oracle Communication Session Border Controller, AudioCodes SBC, Lingre SBC, Anynode SBC.

Alternative & Open-Source Communications: Extensive experience with Free SWITCH, Kamailio, Open SIPS, 3CX, and RingCentral, alongside global SIP trunking solutions.

Cloud & Virtualization: Advanced deployment capabilities across AWS, GCP, and Azure, complemented by virtualized laboratory environments utilizing VMware Workstation and GNS3.

Automation & Operations: Streamlining incident, problem, and change management through Python and shell scripting, alongside business intelligence and workflow automation via Power BI and Power Apps.