Why Host Your VOIP System With Rackzar?
South African businesses need reliable telecommunications infrastructure.
Our local datacenters provide the performance and compliance your VOIP system demands.
Ultra-Low Latency
We only use Juniper and Arista at the core and edge of our network allowing a stable platform for your business to deliver upon.
99.9% Uptime
Our datacenters feature redundant power, UPS systems, and diesel generators. Your phone system stays online during any power outage.
POPIA Compliant
Keep call recordings and customer data within South African borders. Full compliance with data protection regulations.
Instantly Scalable
Start small and scale as you grow. Add more resources or upgrade to dedicated servers without downtime or data migration.
Engineered for Real-Time Communications
VOIP workloads demand deterministic performance. Rackzar operates a fully redundant, high availability network architecture purpose-built for latency-sensitive workloads.
Our network is engineered with multiple BGP upstream providers and diverse routing paths, enabling automatic failover during upstream events with zero manual intervention. Every packet finds the optimal path to its destination.
Routing and switching infrastructure is deployed exclusively on Juniper Networks and Arista platforms, delivering sub-millisecond jitter, predictable latency, and carrier-grade stability that VOIP demands.
We peer nationally at over 400Gbps, operate a full dual-stack IPv4 and IPv6 network, and support customers bringing their own IP address space (BYOIP) to run directly on our infrastructure.
Learn more about our infrastructure and hosting facilities across South Africa.
Supported VOIP Platforms
We support all major VOIP and call center platforms. Choose your preferred solution and we'll help you deploy it.
3CX Phone System
The world's leading software-based PBX. Perfect for businesses wanting a modern unified communications solution with video conferencing, live chat, and mobile apps.
- Web-based management console
- iOS and Android mobile apps
- Video conferencing built-in
- CRM integration support
- WebRTC softphone included
- Live chat & Facebook integration
Yeastar P-Series
Enterprise-grade PBX system designed for growing businesses. Combines traditional telephony with modern UC features for maximum flexibility.
- Linkus UC softphone
- Call recording & monitoring
- IVR & auto-attendant
- Queue management
- API for custom integrations
- Multi-site deployment
ViciDial Call Center
Open-source contact center solution with enterprise features. Ideal for outbound sales teams, customer service centers, and telemarketing operations.
- Predictive & progressive dialing
- Real-time agent monitoring
- Inbound & outbound campaigns
- Detailed reporting & analytics
- Skills-based routing
- CRM & database integration
FreePBX / Asterisk
The most flexible open-source PBX platform. Perfect for businesses needing complete customisation and control over their telephony infrastructure.
- Completely customisable
- No licensing fees
- Extensive module library
- Web-based GUI
- Active community support
- Commercial modules available
FusionPBX
Multi-tenant PBX built on FreeSWITCH. Excellent choice for service providers and businesses needing to manage multiple PBX instances.
- Multi-tenant architecture
- High availability support
- Built-in billing system
- Conference bridges
- Fax server integration
- White-label capable
Custom Solutions
Have a specific VOIP platform in mind? We support virtually any SIP-based telephony solution. Contact us for custom deployment options.
- Kamailio / OpenSIPS
- Issabel (formerly Elastix)
- Wazo Platform
- SRTP/TLS encryption
- Custom SIP configurations
- WebRTC implementations
Recommended Server Specifications
Choose the right hosting plan based on your concurrent call requirements and feature usage.
Small Business
Up to 15 concurrent calls
Medium Business
15 - 50 concurrent calls
Enterprise / Call Center
50+ concurrent calls
VOIP Hosting Use Cases
We understand the needs of your VOIP business and what is important.
Office Phone Systems
Replace expensive legacy PBX hardware with a modern cloud-based phone system. Reduce costs while gaining features like mobile apps, video conferencing, and remote work capabilities.
Outbound Call Centers
Power your sales teams with predictive dialers, campaign management, and real-time agent monitoring. ViciDial and similar platforms help maximise agent productivity.
Customer Support Centers
Handle high volumes of inbound calls with intelligent queue management, skills-based routing, and comprehensive call recording for quality assurance.
Healthcare Practices
POPIA-compliant communication systems for medical practices. Secure patient communication with appointment reminders and after-hours routing.
Legal & Professional Services
Secure call recording and detailed call logs for compliance and billing purposes. Integration with practice management software for streamlined operations.
Multi-Branch Retail
Connect multiple locations under one phone system. Centralised management, inter-branch calling, and unified customer experience across all branches.
What's Included With VOIP Hosting
Every VOIP hosting plan includes essential features to keep your communications running smoothly.
Dedicated IP Address
Every VOIP server includes a dedicated South African IP address, essential for proper SIP trunk registration and firewall configuration.
DDoS Protection
Enterprise-grade DDoS mitigation protects your VOIP infrastructure from volumetric attacks that could disrupt your communications.
Automated Backups
Daily backups on selected plans to ensure your PBX configuration, call recordings, and voicemails are always protected and recoverable.
QoS Optimised Network
Our network prioritises VOIP traffic with Quality of Service settings, ensuring clear calls even during high bandwidth usage periods.
Root / Admin Access
Full root access to your server means complete control over your VOIP configuration, security settings, and software installations.
24/7 Technical Support
Our South African support team is available around the clock to assist with server issues, ensuring minimal downtime for your business.
Ready to Deploy Your VOIP System?
Get crystal-clear calls with our low-latency South African infrastructure. Start with a VPS or go enterprise with dedicated servers.
Other solutions you might be interested in
VPS Servers
Browse our range of powerful Virtual Private Servers and find something within your budget.
Pastel Cloud
Say goodbye to worries about data loss with backups on remote servers with immediate restoration options.
Dedicated Servers
Is your business growing?
Push past constraints and choose a dedicated server.
Frequently Asked Questions
Everything you need to know about VOIP hosting on Rackzar infrastructure.
You can host virtually any VOIP software including 3CX, Yeastar P-Series, ViciDial, FreePBX, Asterisk, FusionPBX, Issabel, Kamailio, OpenSIPS, and more. Our Linux and Windows VPS options support all major PBX platforms. If you're unsure about compatibility, contact our team for guidance.
Requirements depend on your concurrent call volume. For small deployments (up to 15 concurrent calls), we recommend 2-4 vCPUs, 4-8GB RAM, and 50-100GB SSD. Medium deployments (15-50 calls) need 4-8 vCPUs and 8-16GB RAM. For call centers with 50+ concurrent calls, dedicated servers are recommended for optimal performance.
Yes, all our servers are hosted in South African datacenters that are fully POPIA compliant. Your call data, recordings, voicemails, and customer information remain within South African jurisdiction, meeting all data protection requirements. This is particularly important for healthcare, legal, and financial services industries.
Absolutely. Our servers support connections to any SIP trunk provider including South African carriers like Vox, MWEB, Telkom, and ECN, as well as international providers. You have full control over your SIP configuration for redundancy, least-cost routing, or geographic number coverage.
Your VOIP server remains fully operational during load shedding. Our datacenters feature UPS systems and diesel generators with automatic failover. Staff can continue making calls via mobile apps (3CX, Linkus) using cellular data even if your office loses power.
We implement Quality of Service (QoS) policies that prioritise VOIP traffic, ensuring low latency and minimal jitter. With servers in South African datacenters, latency to major metros is typically under 20ms. We also provide unmetered bandwidth so your calls are never throttled.
Yes, we offer both self-managed and fully managed VOIP hosting. With managed hosting, our team handles server maintenance, security updates, backup management, OS patching, and basic PBX administration such as extension setup and trunk configuration. Contact us for a custom quote.
Yes, we can assist with migrating your existing on-premise or cloud-hosted PBX to our infrastructure. For platforms like 3CX and FreePBX, we can perform configuration backup and restore to minimise downtime. We'll help coordinate the migration of your SIP trunks and phone numbers.
Your server is protected by enterprise-grade DDoS mitigation, network firewalls, and intrusion detection. You receive a dedicated IP address and can implement fail2ban, IP whitelisting, SRTP encryption for calls, and TLS for SIP signalling. We recommend regular security updates which we can manage for you.
All VPS and dedicated servers support backup plans based on your requirements, this can be added during checkout.
3CX is designed for business phone systems with video conferencing, live chat, mobile apps, and CRM integration—ideal for office communications. ViciDial is purpose-built for call centers with predictive dialing, campaign management, and agent monitoring. 3CX requires fewer resources; ViciDial often needs dedicated servers.
Yes, our infrastructure is designed for seamless scaling. Start with a VPS and upgrade to higher resource tiers as call volume increases. When you outgrow VPS hosting, we can migrate you to a dedicated server with zero data loss. Upgrades typically complete within hours with minimal disruption.