Real infrastructure problems, documented without exposing client details.

A business needed part of its mailbox population on Google Workspace while other users continued on a legacy mail platform under the same domain.

Designed a controlled coexistence model around mail routing, split delivery, DNS, MX handling, SPF, DKIM and staged validation so both platforms could operate during transition.

A workable coexistence path was validated before wider migration, reducing the need for a single disruptive cutover.

Browser-based agents were failing to register reliably and could not place calls consistently through a VICIdial/Asterisk WebRTC deployment.

Traced the path across browser WebSocket connectivity, TLS certificates, Asterisk HTTPS/WSS configuration, DTLS settings, firewall policy and WebRTC phone parameters.

Browser phone registration and calling were restored after the certificate, WSS and firewall configuration were aligned with the telephony stack.

Infrastructure inventory, monitoring, topology, backups and operator workflows were spread across separate tools and manual processes.

Integrated NetBox, Zabbix and Grafana with a custom operations portal, including inventory synchronization, monitoring visibility, topology workflows, device discovery and configuration-backup capabilities.

The environment gained a more centralized operational view and a foundation for repeatable discovery, monitoring and configuration-management workflows.