Grandstream UCM6308A Audio IP PBX | 1500 Users & 8 FXS/FXO Ports
The Grandstream UCM6308A is a high-end, audio-only Unified Communications (UC) solution designed to be the heart of a large organization's voice network. Based on the reliable Asterisk version 16 open-source telephony operating system， it provides a scalable platform that centralizes all essential business communications, including voice calls, instant messaging (IM), voice meetings, audio web meetings, mobility features, and intercoms onto one powerful network.
Key Features & Specifications
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High Capacity for Large Enterprises – Supports up to 1500 users, 200 concurrent G.711 calls, and 150 concurrent SRTP encrypted calls.
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Extensive Analog Connectivity – Includes 8 FXO ports for connecting to traditional PSTN telephone lines and 8 FXS ports for connecting analog phones or fax machines. All ports have lifeline capability.
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Superior Audio Quality – Features the Full‑Band Opus voice codec and advanced jitter resilience technology, maintaining clear call quality even with up to 50% audio packet loss.
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Seamless Collaboration – Comes with a built‑in platform for instant messaging and audio conferencing, accessible from computers, SIP endpoints, or the free Wave App on desktop, web, and mobile.
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Secure & Reliable – Provides advanced security with secure boot, unique certificate, and random default passwords. Supports hot standby high availability and local dual deployment to ensure business continuity.
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Remote Work Ready – Automated NAT firewall traversal and GDMS cloud management platform facilitate secure remote connections for distributed teams and simplified system administration from anywhere.
Why Choose the UCM6308A for Your Business?
For large‑scale enterprises, call centers, or businesses with a mix of modern IP phones and legacy analog devices, the UCM6308A offers the ideal blend of capacity, features, and reliability.
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Complete Voice Solution – Replaces separate systems for VoIP, analog lines, and messaging.
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Future‑Proof & Scalable – Its high user and call capacity provide ample room for business growth.
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Flexible Integration – The available API allows for seamless connection with third‑party applications like CRM systems, creating a unified workflow.
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Unified Management – Manage the entire system through a single, intuitive interface.
The UCM6308A delivers a comprehensive, secure, and highly reliable business communication platform tailored for large organizations.
Technical Specifications
Frequently Asked Questions
Q1: How many users can the UCM6308A support for my business in Pakistan? +
It is designed for up to 1500 users, making it perfect for large-scale corporate offices, call centers, or multi-branch operations across Pakistan.
Q2: Does it work with PTCL analog lines and old analog phones? +
Absolutely. The UCM6308A has 8 FXO ports for PSTN lines (like PTCL) and 8 FXS ports for analog phones or fax machines, with lifeline capability to keep basic lines functional during a power outage, Additional capacity can be added by connecting external gateways.
Q3: What call center features does it offer? +
It includes powerful call center features like multiple configurable call queues, Automatic Call Distribution (ACD) based on agent skills and workload, and in-queue announcements, making it an excellent choice for a high-volume customer support team.
Q4: How good is the voice quality on inconsistent Pakistani internet connections? +
Very reliable. It supports Full-Band Opus and other advanced codecs with jitter resilience up to 50% packet loss. This ensures stable, clear call quality even on fluctuating broadband or 4G networks.