Unified Communications
MiVoice Office 400
MiVoice Office 400 serves millions of users across retail, healthcare, professional services, hospitality, and engineering — available on dedicated SMBC hardware or as software for single-site or multi-site deployments.

All-in-one communications for SMB
Tiered user profiles (Entry, Premier, Elite) unlock voice, chat, softphone, collaboration, and specialist services. Mitel One delivers cloud-based voice, video, and messaging on desktop and mobile, while Mitel CX adds dedicated contact center capabilities.
Features
- Wide selection of wired, cordless, and softphone devices
- Softphone for PC or mobile with voice, presence, and chat
- Hot desking, DECT, and mobile client for mobile workers
- Video collaboration and onboard audio conferencing
- API, CSTA, and TAPI integration with business applications
- Onboard voicemail, auto attendant, and audio conferencing
- Web-based tools for users and administrators
- Advanced call routing, workflows, and CRM integration
- Operator console — standalone or PC-based
- Vertical solutions for hospitality and healthcare (PMS, nurse call, billing)
Key benefits
- Designed specifically for SMB needs and budgets
- Wide range of integrated business applications
- Full device portfolio with flexible deployment options
- Upfront or subscription-based pricing models
- Future-proof with ongoing feature updates and strong retention
Related products
MiVoice MX-ONEOpen, distributed SIP platform supporting 500 to 500,000 users with on-premises, private cloud, and AWS/Azure deployment.MiVoice BusinessComplete UC and collaboration platform scaling from 5 to 65,000 users — on-premises, private cloud, public cloud, or hybrid.MiVoice Border GatewaySIP-aware edge gateway for secure teleworker access, SIP trunking, WebRTC, and remote management of Mitel platforms.