Why PoC
The end of repeaters, licences and dead zones.
Push-to-Talk over Cellular runs your mission-critical voice on carrier-grade infrastructure that already covers 54 African countries. No towers to build. No spectrum to buy. No regions you cannot reach.
Carrier-grade core · at a glance
- 99.95%
- core uptime SLA
- <200ms
- voice latency
- AES-256
- end-to-end
- 50k+
- concurrent units
Headline benefits
What you actually get on day one.
Nationwide & cross-border coverage
Ride the full LTE/5G footprint of MTN, Vodacom, Safaricom, Orange and Airtel — no repeaters, no licensing, no line-of-sight. From Cape Town to Cairo, your team talks on the same channel.
Sub-200ms voice latency
Carrier-grade media servers, geographically distributed nodes and optimised codecs deliver PTT call setup under 300ms and voice latency under 200ms — faster than most legacy DMR networks.
70% lower total cost of ownership
No tower builds, repeater maintenance, spectrum fees or frequency coordinators. One per-user monthly fee replaces capex-heavy TETRA and DMR estates.
Voice + GPS + safety on one platform
Push-to-talk, live location, geofencing, man-down, SOS, dispatch console and incident workflow run from a single carrier-grade core — not five bolted-together vendors.
Under the hood
Engineered like a mobile network — not a mobile app.
Highly available core
Active-active media servers across multiple data centres with automated failover. Designed for 99.95% uptime even when a regional carrier dips.
End-to-end AES-256 encryption
Every voice call, GPS update and message is encrypted on the device and decrypted only at the authorised endpoint. FIPS-compliant key management.
Open APIs and SIP gateway
REST and WebSocket APIs for dispatch, location and recording. SIP trunk bridges your PoC fleet into existing PABX, call centres and DMR/TETRA gateways.
Voice recording & playback
Every transmission is recorded with timestamp, GPS coordinate and channel metadata. Searchable archive supports POPIA, GDPR and ISO 27001 audit requirements.
Scales from 50 to 50,000 users
Add a unit in seconds, not weeks. Horizontal scaling means a 20-guard contract today and a 20,000-guard contract next year run on the same platform.
Group, individual & broadcast
Unlimited talk groups, dynamic regrouping, one-to-one calls, all-call broadcasts and priority pre-emption for supervisors and emergency users.
PoC vs legacy radio
A side-by-side decision.
Operations that benefit most
If voice downtime costs you money, PoC pays for itself in weeks.
Teams already running on NexusPoC report faster response times, fewer lost-time incidents and dramatically lower communications spend versus the radio fleets they replaced.
See case studies- 24/7 armed-response control rooms
- Multi-site mining and construction crews
- Long-haul logistics fleets across borders
- Oil & gas mustering and lone-worker safety
- Event security with dynamic talk groups
- Agricultural operations across vast farm blocks
Ready to retire the repeater?
Book a 30-minute discovery call. We will size a pilot for your sites, your carriers and your control room workflow.