The NEC SL2100 is a smart, hybrid IP-PBX/PABX communication system designed for small and medium businesses supporting roughly 5 to over 100 users. It delivers enterprise-grade features—such as built-in VoIP, voicemail, auto-attendant, and mobility—in a cost-effective, scalable modular chassis. Key Features & SpecificationsFlexible Architecture: Supports traditional analog lines, ISDN, and SIP/VoIP trunks, alongside digital, analog, or IP extensions. Built-in Capabilities: Comes standard with auto-attendant (IVR), voicemail, audio/video conferencing support, music on hold, and mobile/remote extension routing. Unified Communications (InApps): Includes options for web-based UC clients, call recording, basic hotel features, and system health checks. Scalability: Easily expands from a compact single-chassis configuration to a multi-chassis setup as business requirements grow.