The GRANDSTREAM UCM6308 IP PBX Appliance is a robust, on‑premises telephony platform designed for growing businesses that need reliable, scalable voice services and seamless integration with existing networks. Built on a powerful 6‑core processor and running Asterisk 16, it delivers enterprise-grade performance with clear, high‑quality calls.
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Model: UCM6308
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Brand: GRANDSTREAM NETWORKS, INC
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Processor: 6‑core
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RAM: 4GB
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User Capacity: up to 5,000 users (5,000 users total with 500 concurrent calls)
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Ports: FXS/FXO for versatile analog device integration
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Software: Asterisk 16
This appliance is ideal for businesses seeking a scalable, on-site telephony solution that can grow from small teams to large enterprises without migrating to the cloud. The combination of a robust processor, ample RAM, and native Asterisk 16 features enables advanced call routing, voicemail, IVR, conferencing, and customization tailored to your workflows. With FXS/FXO ports, you can bridge traditional analog devices and PSTN lines alongside IP endpoints for a gradual, cost‑effective transition.
Specifications
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Model: UCM6308
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Brand: GRANDSTREAM NETWORKS, INC
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Processor: 6‑core
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RAM: 4GB
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User Capacity: 5,000 users (500 concurrent)
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Ports: FXS/FXO
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Software: Asterisk 16
Frequently Asked Questions
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What is the maximum number of concurrent calls supported? Up to 500 concurrent calls.
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Does it support analog phones? Yes, through FXS/FXO ports.
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What operating system does it use? It runs on Asterisk 16.
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Is the device suitable for large enterprises? Yes, it supports up to 5,000 users.
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What is the RAM capacity? The device includes 4GB of RAM.
