240+ Concurrent Calls
3 Countries
99.97% Uptime
SaaS Platform Case Study

Building a High-Availability Contact Center SaaS for Providers in USA, UAE, and KSA

How INVASSO engineered a multi-tenant, cloud-based call center platform with SIP integrations, real-time operations, and full CRM capabilities.

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Executive Summary

A growing cloud contact center provider operating across the UAE, KSA, and USA partnered with INVASSO to build a scalable SaaS call center platform capable of:

Managing 240+ concurrent active calls
Handling inbound & outbound VoIP traffic across multiple carriers
Integrating any SIP trunk instantly
Providing real-time dashboards & analytics
Offering a fully integrated CRM system
Operating as a multi-tenant SaaS with strong security boundaries
Implementing automated call workflows
Ensuring enterprise-grade uptime & failover resilience

The result was a carrier-agnostic, high-availability contact center ecosystem engineered for stability, clarity, and global scalability.

Context & Industry Stakes

Modern contact centers are expected to deliver:

Low latency
High call quality
Real-time reporting
Multi-channel communication
Advanced routing & IVR
CRM-level customer insight
Automated call workflows
AI-driven quality monitoring

Before INVASSO's transformation, the provider faced:

Infrastructure instability under heavy concurrent loads
Difficulty onboarding clients across multiple countries
Limited CRM capabilities
Lack of unified analytics
Difficulty integrating new SIP carriers
No multi-tenant segmentation for customer data

Scaling globally would be impossible without a robust, cloud-native contact center engine.

The Challenge

01

High Concurrency Requirements

The platform needed to reliably support 240+ simultaneous calls with no audio degradation.

02

Global SIP Trunk Integrations

Different clients used different carriers in USA, UAE, and KSA — the system had to support all.

03

Multi-Tenant SaaS Architecture

Each client needed isolated dashboards, users, queues, campaigns, CRM data, reports, and call recordings.

04

Integrated CRM + Call Center in One Platform

Agents needed customer insight without switching systems.

05

Low-Latency Call Routing

Cross-region traffic had to remain stable regardless of call volume.

06

Strict Security Requirements

The platform needed encryption, audit logs, and role-restricted access to meet enterprise and government standards.

Why the Provider Chose INVASSO

Proven Experience in High-Load, Real-Time Systems

The platform required serious engineering — not typical web development.

Deep Knowledge of Telephony, VoIP & SIP Protocols

Inbound/outbound routing, codecs, failover logic, and carrier integration required specialized engineering.

Ability to Build a True Multi-Tenant SaaS

Role-based access, data isolation, and tenant-level analytics were critical.

End-to-End Product Ownership

INVASSO delivered everything: cloud infrastructure, backend engine, admin interface, dashboards, CRM, analytics, and multi-tenant logic.

Transformation Strategy — A Modern Cloud Contact Center Ecosystem

INVASSO designed and delivered a platform built on five core pillars:

1

Carrier-Agnostic SIP Trunk Integration

The platform supports ANY SIP provider globally: UAE (Etisalat, Du, etc.), KSA (STC, Mobily, Zain), USA (Twilio, Telnyx, Bandwidth, etc.). Instant provisioning for inbound & outbound calling.

2

Multi-Tenant Contact Center Engine

Each tenant receives isolated call queues, routing rules, agent groups, data storage, CRM profiles, reports, and API keys. Perfect for SaaS scalability.

3

Advanced Call Center Features

Including IVR (multi-level), call recording, warm/blind transfer, call barging/whispering, skill-based routing, auto/predictive dialer, campaign management, real-time SLA monitoring, and call tagging.

4

Fully Integrated CRM

Agents see customer profiles, previous calls, notes, tickets, interactions, cases, and lead/opportunity status. No need to integrate external CRMs unless desired.

5

Real-Time Dashboards & Analytics

Live monitoring for concurrent calls, agent states, queue performance, SLA compliance, campaigns, average handling time, and first call resolution.

6

AI-Driven Quality Monitoring

AI-driven tools ensure consistent call quality across all regions.

Implementation 4-Phase Engineering Framework

← Swipe to see all phases →

01

Discovery

Mapped telephony workflows
Defined multi-tenant structure
Modeled routing logic
Identified global SIP providers
Established KPI goals for call concurrency

Results & Measurable Impact

240+ Concurrent Calls With Zero Audio Degradation

Optimized RTP & SIP routing ensured flawless quality.

99.97% Uptime Across All Tenants

High availability architecture with automatic failover.

35% Faster Call Handling Time

CRM integration reduced agent switching.

62% Improvement in Routing Accuracy

Skill-based routing and IVR logic improved resolution speed.

48% Cost Reduction in Telephony Operations

Carrier flexibility lowered cost per minute.

3× Increase in Onboarding Speed

New clients activated in hours, not days.

Future State Transformation Realized

The provider now operates a world-class SaaS contact center platform with:

Scalable multi-tenant operations
Carrier-agnostic SIP flexibility
Built-in CRM
Enterprise-grade reporting
Global readiness
High concurrency support
Competitive telephony features
Automated call workflows

Automated call workflows

Smart routing, auto-classification, and workflow automation reduced manual agent actions and improved response times.

The platform has become the core SaaS product powering the provider's expansion across USA, UAE, and KSA.

Technologies & Integrations

SIP, RTP, VoIP
ACD/IVR engines
WebSockets for real-time analytics
Cloud-based multi-tenant architecture
CRM module with custom workflows
Role-based access control
Failover & redundancy systems
Real-time monitoring & alerting systems

Strategic Takeaways

1

Multi-tenant architecture future-proofs SaaS businesses

2

Carrier-agnostic SIP routing reduces operational cost

3

Real-time dashboards improve performance KPIs

4

Integrated CRM leads to faster resolution

5

High concurrency support is critical for enterprise clients

6

Implementing automated call workflows enhances efficiency

7

AI-driven quality monitoring ensures consistent call quality

Build With Confidence

Design a Cloud Contact Center Platform Built for Global Scale

INVASSO engineers telephony systems, CRMs, SaaS platforms, and multi-tenant infrastructures.

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