Migrate from Legacy to
Modern UC Without Disruption
When moving from legacy digital systems to IP-based unified communications, enterprises need a migration path that minimizes risk and disruption. OpenScape 4000 provides that path with a hybrid IP/PBX architecture that preserves existing infrastructure investments while introducing modern UC capabilities. Designed for complex, multi-site deployments of up to 12,000 users, OpenScape 4000 keeps your workforce connected, your operations resilient, and your migration timeline firmly in your hands.
Benefits of OpenScape 4000
Deployment Flexibility Without Forced Migration
OpenScape 4000 delivers converged IP and TDM infrastructure that lets you migrate at your own pace—whether maintaining on-premises control, deploying VMware-based private cloud, or implementing hybrid configurations. This architectural flexibility protects your investment while supporting modern SIP-based communications and legacy digital endpoints simultaneously.
Investment Protection Through Technology Evolution
Built on proven enterprise technology with active-standby dual node architecture, OpenScape 4000 ensures zero calls lost during system failovers while supporting up to 12,000 users on a single system. Mitel licensing enables seamless portability across the entire OpenScape solution family, protecting your software investment as business requirements evolve.
Enterprise Scale with Operational Resilience
OpenScape 4000 scales from 300 to 12,000 users per system with network capability extending to 100,000 users, while industry-leading DECT wireless deployments and cost-effective branch office survivability solutions ensure reliable communications across distributed operations. OpenScape Management Applications provide zero-touch maintenance, reducing operational overhead for IT teams.
OpenScape 4000 Configurations for Enterprise Scale
For Large Centralized Enterprises
Single-system deployment supporting 300 to 12,000 users with full redundancy and resilience.
OpenScape 4000
For Multi-Site Global Operations
Networked configuration enabling up to 100,000 users across distributed locations with centralized management.
OpenScape 4000 Network Configuration
For Virtualized Data Centers
VMware-based private cloud deployment with flexible resource allocation and active-standby architecture.
OpenScape 4000 Eco Server
Key Features
Hybrid Architecture for Migration Control
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Supports simultaneous operation of legacy digital TDM endpoints and modern IP-based SIP devices, enabling phased migration strategies that protect existing hardware investments while introducing unified communications capabilities at the enterprise's preferred pace.
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Delivers standards-based SIP connectivity for modern endpoints, softphones, and third-party integrations without requiring proprietary protocols, ensuring interoperability with current and future communications technologies across the enterprise ecosystem.
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Enables private cloud deployment on VMware, Nutanix, Hyper-V and Proxmox infrastructure with flexible resource allocation, providing cloud economics and management benefits while maintaining full on-premise data control for organizations with sovereignty or compliance requirements.
Enterprise-Grade Reliability
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Implements geographic redundancy with automatic failover that ensures zero calls lost during system switchovers, protecting mission-critical communications for healthcare facilities, financial trading floors, emergency services, and manufacturing operations where downtime means lost revenue or compromised safety.
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Supports distributed deployment with survivable branch configurations and centralized management, ensuring communications continuity even when WAN connectivity to headquarters fails—critical for retail chains, distributed healthcare systems, and multi-site manufacturing operations.
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Integrates with OpenScape Management Applications suite for automated software updates, configuration management, and system monitoring, reducing IT operational overhead while ensuring systems remain current with security patches and feature enhancements without manual intervention.
Scalable Connectivity Solutions
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Delivers secure wireless mobility for frontline workers in healthcare, manufacturing, warehouses, and hospitality through dedicated DECT spectrum that avoids Wi-Fi congestion, supporting mobile teams who need reliable voice communications while moving across large facilities or campuses.
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Provides distributed survivability through SoftGate, Branch, EcoBranch, and Enterprise Gateway solutions that ensure local calling continuity when WAN links fail, protecting communications for remote offices, retail locations, and distributed operations without requiring full PBX infrastructure at every site.
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Enables license portability across the entire OpenScape Enterprise solution family, protecting software investment as business needs evolve and allowing migration between OpenScape 4000, OpenScape Voice, and other OpenScape platforms without repurchasing user licenses.
- White Paper
Mitel Named Leader Again in the 2026 Aragon Research Globe for Intelligent UC&C
OpenScape 4000 in Action
Schloss Fuschl, A Luxury Collection Resort & SPA
Schloss Fuschl, A Luxury Collection Resort & Spa, is a 5-star superior resort in the Salzburg region of Austria. It is renowned for its idyllic setting on Lake Fuschl and luxurious amenities such as a golf course, spa facilities, and classic car excursions, making it one of Europe’s top destinations for unforgettable stays.
InterContinental Nha Trang
The InterContinental Nha Trang is the ultimate luxury beachside retreat on Vietnam's southern coastline. In addition to 277 elegantly furnished rooms and suites, the hotel offers many facilities and amenities for guests to enjoy. These include a fitness center featuring three outdoor pools, an on-site spa offering extensive treatments, and a choice of all-day a-la-carte dining experiences. Thanks to its standout location, exceptional facilities, and attentive customer service, the hotel regularly gets 5-star reviews from guests and visitors.
Starwood Hotels - Resorts
When Starwood went looking for a better way to handle their communications, they knew exactly what they wanted. With nearly 1,200 properties and more than 170,000 employees in about 100 countries worldwide, they needed technology that could be integrated across all their existing solutions, in all types and sizes of properties.
Hyatt Hotels Corporation
Hyatt manages luxury hotels and resorts around the globe, and both customers and employees needed a lot from their communications system.
Awards
Services for Your Enterprise Communications Evolution
Mitel Services help plan, deploy, and support large-scale communications platforms built around your operational requirements and migration timeline.
- Consulting: Strategic guidance for hybrid architecture design, capacity planning, and phased migration strategies
- Deployment: Efficient implementation across distributed sites with minimal disruption to ongoing operations
- Support: 24/7 enterprise-grade support with zero-touch maintenance and proactive system monitoring
Features Comparison
| Features | OpenScape | OpenScape 4000 Eco Server |
|---|---|---|
| Maximum Users (Single System) | 12,000 | 12,000 |
| Network Capability | 100,000 users | 100,000 users |
| Deployment Type | On-Premise | VMware Private Cloud |
| Hybrid IP/TDM Support |  | |
| Active-Standby Redundancy | | |
| Geographic Redundancy | | |
| Native SIP Support | | |
| DECT Wireless Integration | | |
| OpenPath Licensing | | |
| OpenScape Management Apps | | |
| Branch Survivability | | |
| Zero-Touch Maintenance | | |
Related Products
Frequently Asked Questions - Your Questions About OpenScape 4000 Answered
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OpenScape 4000's converged IP/PBX architecture allows you to maintain existing digital TDM endpoints while introducing SIP-based devices and UC applications at your preferred pace. You can operate both technologies simultaneously, migrate user groups strategically, and retire legacy infrastructure when business timelines allow—not when vendors force upgrades.
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OpenScape 4000 provides true deployment flexibility: maintain on-premises control for data sovereignty, implement VMware-based private cloud for infrastructure efficiency, or deploy hybrid configurations mixing on-premises and cloud resources. Cloud-only platforms force all communications and data into public cloud infrastructure, which may conflict with regulatory requirements, security policies, or existing IT investments.
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Yes. OpenScape 4000 delivers industry-leading DECT wireless capabilities through dedicated spectrum that avoids Wi-Fi congestion, supporting secure mobile communications for healthcare clinical staff, manufacturing floor workers, warehouse operations, and hospitality teams who need reliable voice while moving across large facilities or campuses.
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OpenScape 4000 supports cost-effective survivability through SoftGate, Branch, EcoBranch, and Enterprise Gateway solutions that ensure local calling continuity when WAN connectivity to headquarters fails. Remote sites maintain essential communications for customer service, operations, and safety without requiring full PBX infrastructure at every location.
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Mitel licensing provides portability across the entire OpenScape Enterprise solution family, meaning your user licenses can move between OpenScape 4000, OpenScape Voice, and other OpenScape platforms as business needs evolve. This protects your software investment and provides migration flexibility without vendor lock-in or license repurchase requirements.