Enterprise VoIP Development Services
OpenCollar Technologies architects, builds, and manages enterprise-grade VoIP solutions — from Cloud PBX systems and SIP trunking to full call-center platforms with IVR, WebRTC, call recording, and deep CRM integration. We deliver scalable, secure voice infrastructure that powers remote teams, multi-location offices, and high-volume contact centers worldwide.
Our VoIP Expertise
A decade and a half of hands-on experience across every layer of the VoIP stack — signaling, media, security, and integration.
SIP Protocol Configuration
Deep expertise in SIP signaling, call setup, registration, and interoperability between diverse VoIP endpoints and gateways.
Asterisk & FreePBX Administration
Production-grade deployment, tuning, and management of Asterisk-based PBX platforms with custom dialplans and modules.
PBX System Design & Deployment
End-to-end architecture of cloud and on-premise PBX systems — multi-tenant, highly available, and geo-redundant.
RTP Media Handling & QoS Optimization
Real-time media stream management with codec negotiation, jitter buffer tuning, and network QoS policies for crystal-clear audio.
WebRTC Integration
Browser-native voice and video calling with SRTP, DTLS, and ICE/STUN/TURN for seamless peer-to-peer and gateway connectivity.
VoIP Security (SRTP, TLS, Firewall)
Hardened VoIP infrastructure with encrypted media, signaling-layer TLS, intrusion detection, and toll-fraud prevention.
Session Border Controller (SBC) Setup
Deployment and configuration of SBCs for NAT traversal, topology hiding, DoS protection, and inter-network interoperability.
Call Routing & Dial Plan Configuration
Intelligent call routing with time-based rules, least-cost routing, geographic failover, and multi-level IVR trees.
API Integration (CRM & Ticketing)
Seamless integration between VoIP systems and CRMs (Salesforce, HubSpot), ticketing (Zendesk, Freshdesk), and business apps via REST and WebSocket APIs.
Latency, Jitter & Packet Loss Troubleshooting
Network diagnostics, SIP trace analysis, and proactive monitoring to ensure sub-150ms latency and near-zero packet loss across global deployments.
VoIP Applications We Deliver
Production-ready VoIP products and platforms built with battle-tested open-source and commercial stacks, tailored to your business requirements.
Cloud PBX System
Virtual phone system hosted in the cloud with auto-scaling, multi-tenant isolation, and enterprise-grade uptime SLAs.
Softphone Application
Cross-platform software phone for desktop and mobile with HD audio, presence, chat, and CRM screen-pops.
Call Center Platform
Full-featured inbound/outbound campaign management with ACD, skill-based routing, wallboards, and supervisor tools.
Auto Dialer System
Predictive, progressive, and preview dialer modes that maximize agent productivity while staying compliance-ready.
IVR System
Multi-level interactive voice response menus with speech recognition, DTMF input, and dynamic database lookups.
Voicemail-to-Email
Automatic transcription and delivery of voicemail messages to email with searchable archives and mobile notifications.
Video Conferencing App
Real-time voice and video communication with screen sharing, recording, virtual backgrounds, and calendar integration.
Call Recording System
Automatic and on-demand call recording with encrypted storage, PCI redaction, and compliance-ready retention policies.
SIP Trunking Service
Connects your PBX to public and private telecom networks with number porting, failover, and elastic channel scaling.
CRM Call Integration
Click-to-call, automatic call logging, screen pops, and disposition codes directly inside your CRM of choice.
Our VoIP Development Workflow
A proven 8-step delivery process that takes your VoIP project from requirements to production with zero downtime cutover.
Our Process
Discovery & Requirements Analysis
We audit your current telephony landscape, map call flows, document integration needs, and define KPIs — uptime, call quality (MOS), and cost targets.
SIP & PBX Architecture Design
Design the VoIP topology — SIP trunking, SBC placement, codec strategy, network QoS, high availability, and disaster recovery with documented architecture diagrams.
Development & Integration
Build PBX dialplans, IVR trees, call routing rules, WebRTC gateways, and API integrations (CRM, ticketing, analytics) with automated test harnesses.
Security Hardening
Enable SRTP, TLS, firewall ACLs, fail2ban, rate limiting, and SBC policies. Conduct toll-fraud and DoS penetration testing.
Load Testing & Call Quality Audit
Simulate thousands of concurrent calls, measure MOS scores, identify bottlenecks, and tune jitter buffers, codec selection, and network paths.
Cloud PBX Deployment
Provision cloud infrastructure (AWS, Azure, GCP), deploy HA clusters, configure DNS SRV, and migrate existing numbers with zero-downtime cutover.
Training & Go-Live
End-user and administrator training, runbook handoff, monitoring dashboards, and phased go-live with dedicated support during transition.
Managed Support & Optimization
24/7 monitoring, proactive capacity planning, monthly call-quality reports, and continuous optimization of routing, costs, and user experience.
What Businesses Need Most
The most requested VoIP setup combines Cloud PBX with full call-center capabilities — and that is exactly where we excel.
Cloud PBX + Call Center
Businesses predominantly need a Cloud PBX with integrated call-center features — IVR menus, intelligent call routing, automatic recording, and CRM integration — all managed from a single platform.
Scalable & Remote-Ready
Infrastructure that supports remote teams, multiple office locations, and dynamic scaling — softphones, WebRTC, and mobile apps that work seamlessly from anywhere in the world.
Secure & Cost-Efficient
Enterprise-grade security (SRTP, TLS, SBC), 99.99% uptime reliability, and cost-efficient international calling with least-cost routing and elastic SIP trunking.
Industries We Serve
Our VoIP solutions power voice communications across regulated, high-volume, and distributed industries worldwide.
Key Deliverables
Why Choose OpenCollar
Ready to Modernize Your Voice Infrastructure?
Schedule a complimentary VoIP assessment. We will evaluate your current telephony setup, map your call flows, and deliver a detailed architecture proposal with cost projections — no obligation.