GS-UCM6304A - Grand Stream 4 FXO, 4 FXS, 1000 Users AUDIO ONLY | Aztek Computers
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SKU: WKNU0S5QLI |  Mfg. Part: GS-UCM6304A  | UPC: 6947273703570  | 
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GS-UCM6304A - Grand Stream 4 FXO, 4 FXS, 1000 Users AUDIO ONLY

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$418.21  $564.58

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Product Overview

- Supports up to 1000 users and up to 120 concurrent calls
- Zero configuration provisioning of Grandstream SIP endpoints
- Built-in Instant Messaging (IM), Audio Conferencing & Web Meetings platform that supports access from computers, mobile devices, and SIP endpoints
- Free Wave App allows easy voice & Instant Messaging (IM) communications using desktops, Web, and Android/ iOS devices
- API available for third-party integrations, including CRM and PMS platforms
- Advanced security protection with secure boot, unique certificate and random default password to protect calls and accounts
- Three Gigabit auto-sensing RJ45 network ports with integrated PoE+ and support NAT router
- Automated NAT firewall traversal service facilitates secure remote connections
- Enhanced reliability with support for Hot Standby High Availability and local dual deployment
- Supports Full-Band Opus voice codec,jitter resilience up to 50% packet loss
- Compatible with GDMS for cloud setup, management and monitoring
- Based on Asterisk* version 16 open source telephony operating system

Expert Overview

The GRAND STREAM GS-UCM6304A is an audio-only IP PBX system designed for businesses requiring a unified communication solution for up to 1000 users. This unit supports a maximum of 150 concurrent calls and integrates a built-in platform for instant messaging and audio conferencing, accessible via computers, mobile devices, and SIP endpoints. It features four FXO ports and four FXS ports, providing connectivity for traditional phone lines and analog devices. The system offers zero-configuration provisioning for Grandstream SIP endpoints and includes the free Wave App for voice and IM communications across various devices. For IT environments, it provides advanced security features like secure boot and unique certificates, along with three Gigabit RJ45 network ports with integrated PoE+. The GS-UCM6304A also supports API for third-party integrations, such as CRM and PMS platforms, and is compatible with GDMS for cloud management, making it suitable for organizations needing a scalable and secure communication infrastructure.

Technical Specifications

Maximum Concurrent Calls: 150
Number FXO Ports: 4
Number FXS Ports: 4
Wall or Rack Mountable: Wall
Color: Gray

Product Details

  • Manufacturer:
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  • ASIN:
  • UPC:
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  • GRAND STREAM
  • GS-UCM6304A
  • B09MJ66WKR
  • 6947273703570
  • New
  • 2.95 lbs
  • 15 X 5 X 9
  • Jul 28, 2026
  • Oct 29, 2025
Product Identifiers: Brand: Grand Stream • Part #: GS-UCM6304A • UPC: 6947273703570 • ASIN: B09MJ66WKR • Category: Business Phones

Frequently Asked Questions

What is the maximum user capacity and concurrent call limit for this system?

The system supports up to 1000 users and can handle a maximum of 150 concurrent calls.

What types of ports are included for connecting to phone lines and analog devices?

It includes 4 FXO ports for connecting to traditional phone lines and 4 FXS ports for analog devices.

Is this system suitable for remote users or multi-site deployments?

Yes, it features automated NAT firewall traversal for secure remote connections and supports Hot Standby High Availability for enhanced reliability, making it suitable for remote and dual deployment scenarios.

What kind of network connectivity does the GS-UCM6304A offer?

It provides three Gigabit auto-sensing RJ45 network ports, all with integrated PoE+ support, and can function as a NAT router.

GS-UCM6304A - Grand Stream 4 FXO, 4 FXS, 1000 Users AUDIO ONLY

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Reviews for Grand Stream GS-UCM6304A

$418.21