1. Telephony & All-IP Migrations (CUCM / MS Teams / Webex)

Vendor-independent guidance for complex architecture transformations – from large-scale corporate enterprise environments to specialized mid-sized infrastructures:

• Transitioning Legacy PBX / Cisco CUCM to Microsoft Teams Phone: Conceptual design, routing architecture, Direct Routing, and global PSTN connectivity.
• Webex Calling & Hybrid Deployments: Setup of Webex Calling on UCM, Hybrid Data Security (HDS), Hybrid Calendar, and SSO integrations (including via Citrix Netscaler).
• Provider PSTN Integration: Connecting complex SIP trunks, routing tables, and executing All-IP migrations.

2. Session Border Controller (SBC) & Gateway Architecture

Planning, sizing, certificate management, and implementation of security gateways at the boundary between internal networks and Public Switched Telephone Networks (PSTN):

• AudioCodes Mediant & OVOC: Configuration, routing rules, and integration with MS Teams, Zoom, or Cisco nodes.
• Cisco CUBE (ISR Routers): Setup, IPv4/IPv6 translation, dial-peer optimization, and security hardening.
• Anynode SBC: Flexible software SBC integration for heterogeneous multi-vendor environments.

3. Multi-Vendor Video Conferencing & Collaboration Platforms

Seamless interconnection of diverse video systems within the organization for modern hybrid workspaces:

• Interoperability: Connecting Cisco VCS/Expressway, Cisco Meeting Server (CMS/Acano), and Pexip Infinity with Microsoft Teams (CVI) and Zoom.
• Infrastructure Migrations & Datacenter Moves: Secure relocation of conferencing systems within multi-tiered firewall environments.

4. Audits, Security, Certificate Management & Troubleshooting

Deep-dive analysis and hardening of existing voice and data infrastructures:

• UC Infrastructure & Toll-Fraud Audits: Reviewing security configurations, preventing fraud/abuse, and conducting configuration audits against industry best practices.
• Deep-Dive Troubleshooting: L3 support, logfile and packet analysis using Wireshark & TranslatorX, debugging complex latency, jitter, and call quality issues.
• Certificate Management: Implementation and maintenance of encrypted signaling and media (TLS/SRTP, mTLS) across complex clusters and firewalls.

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