Telecom & VoIP Services
Business telephony belongs in the cloud today — no longer in a grey cabinet in the attic. The ROTZ Hosted PBX runs on hardened Asterisk/FreePBX, with Tier-1 SIP trunks, HD audio via the Opus codec and native integration with Microsoft Teams.
Choose between the Kiezel (turnkey) or a fully tailored ROTZ PBX. You manage call routes, opening hours, IVR menus, queues with SLA reporting and VIP priority. We set it up, document every change and stay available for continuous optimisation.
Call directly from Teams with our SIP trunks via Direct Routing or Operator Connect — without Microsoft Calling Plans. One numbering plan, one address book, one app for chat, meetings and calls. We handle SBC, certificates and number porting.
HD audio via Opus and G.722 over QoS-tuned networks: DSCP tagging, jitter buffers and SBC-based transcoding. No crackle, no echo. End-to-end encrypted with SRTP and TLS. Call with Yealink/Snom handsets, softphones (Zoiper, Bria) or our own mobile app.
Click-to-dial, screen pop and call logging in HubSpot, Salesforce, Pipedrive, Exact, Teamleader or a custom CRM. Webhooks and an open REST API for custom work. Real-time wallboards and historical reporting help your team be measurably more reachable.
Tech stack
We build on proven, enterprise-grade components — open where possible, closed where necessary. No vendor lock-in, no surprises. Just transparency about what we deploy and why.