GrandStream UCM6304 IP-PBX Phone System - Voice & Video

GrandStream UCM6304 IP PBX - Voice & Video - Overview:

This IP-PBX Phone System from Grandstream (UCM6304) is designed specifically for small business who need 4 analog lines (PSTN/FXO) capacity, 4 analog extension (FXS) with larger expansion trunk options for VoIP telephone lines. This SOHO (Small Office - Home Office) and medium sized business system has all features included at no extra license or monthly cost! This UCM 6304 offers one of the lowest TOC / Total Ownership costs on the market today.

With more and more businesses moving to VoIP (Voice-over-IP) telephone line service - this in house PBX System Model can handle the needs of most companies. It offers Video and Audio Conferencing for local and remote workers. also now provides pre-ship Configuration Services, as well as Extended Warranty options.

Install faster on site with our Configuration Services. Keep your phone system running and up to date with our Extended Warranty and Support plans!

ucm 6304 front back panel views

GrandStream UCM6304 Main Specifications:

This new generation of IP-PBX Telecommunications server offers faster 6 Core Processing CPU with faster Audio and Video throughput. It bridges the gap between older systems and new systems to offer local users and remote / home workers a more robust system for today's work and corporate business environments.

The GrandStream UCM6204 supports up to 350 concurrent SIP calls, up to 150 concurrent WebRTC calls, up to 200 audio conference participants and up to 40x 1080p HD participants.

  • NO LICENSING or Monthly Fees associated with features. This is an ALL-inclusive phone system.
  • 4 FXO (analog telephone line ports).
  • 4 FXS (analog extension ports).
  • Supports up to 2,500 SIP users (SIP + 4 FXO)
  • 150 SIP trunks.
  • Up to 350 concurrent audio calls.
  • 3x Gigabit RJ45 ports with integrated PoE Plus (IEEE 802.3At-2009).
  • Easy to use webGUI interface with access to all features and functions for system administrator.
  • Individual user webGUI access for extension users to access personal settings, call recordings, faxes, etc.
  • Zero configuration provisioning of Grandstream SIP endpoints.
  • Comprehensive network security protection using SRTP, TLS and HTTPS with hardware encryption accelerator, Fail2ban, Whitelist, Blacklist, alerts and more to protect against attacks.

UCM6304 IP-PBX Call Features and Functions:

These systems include all in telephony features such as:

  • Auto-Attendants / IVR (Interactive Voice Response).
  • Call Center Set-up + Call Reporting Functions.
  • Live Built-in Auto/Manual Call Recording.
  • CDR - Call Detail Records.
  • Zero-Config provisioning (for IP Phone Extensions).
  • Call Park/Orbit, Hold, Transfer, Follow-me,
  • Time Mode Scheduling.
  • Video Calling Capabilities.
  • Automated System Back-ups.
  • Web based PC and Mobile App based calling functions.
  • Fax to email, and much more!

Remote Worker PC and Mobile App - Workforce solutions

The IP-PBX UCM Series Phone Systems also include a suite of integrated solutions for small office, medium business and corporate connectivity and workflow.

ucm 63xx remote connect solutionsUCM RemoteConnect allows businesses to easily build a secure collaboration solution for remote workers and devices.

It offers a companion cloud service for the UCM6300 series that provides always on, automatic NAT firewall traversal to ensure secure connections by remote users. UCM RemoteConnect provides powerful audio and video collaboration tools to remote users through Grandstream’s Wave mobile and desktop app, GUV series of USB personal collaboration devices and SIP endpoints integrated with the UCM6300 series.

By providing a full eco-system of remote collaboration tools, services and management for the UCM6300 series, UCM RemoteConnect is the ideal platform for any organization looking to securely support remote workers.

GS Wave Mobile cell and PC calling appThe GS Wave app allows users to connect to their existing work / office extension. Work from home or when traveling to make and receive calls on the go.

GS Wave is a FREE soft phone application which allows users to make and receive voice/video calls through business or residential SIP accounts on any iPhone or Android™ device (version 4.1+) from anywhere in the world, via either cellular data or WiFi.

With Grandstream GW Wave - business and residential home workers users always have access to their SIP lines and can easily keep in touch with business or personal contacts without using expensive cellular data plans or third party solutions.

Brand Manufacturer:
SKU - Product Code:
Equipment Use Type:
IP-PBX Phone System Main Box
System Functionality :
Max. Call Capacity :
SIP Extension Capacity :
VoIP Trunk Capacity :
Analog (FXO) Phone Line Capacity :
Analog (FXS) Extension Ports :
Gigabit Network Ports:
Three self-adaptive Gigabit ports (switched, routed or dual mode) with PoE+
Expandable Storage Memory:
Yes - 2x USB + SD Card or powered USB drive
6 Core Processor
Internal Memory:
4 GB RAM and 128GB flash
Multi-Site Connect :
IVR - Auto Admins :
Multi-level - Up to five levels
Multi-Company Capable :
Live Call Recording Server :
CRD (Call Detail Records) :
Multi-Language Support :
Yes, Standard Installed and downloadble language sets
Supports SIP Video :
SIP Video Codecs :
H.264 - H.263 or H.263+
Security :
Yes - SRTP - TLS and HTTPS encyrption
Call Queue - Call Center Functions :
Call Monitoring - Call Recording :
Auto Configure SIP Endpoints :
Manual Configure SIP Endpoints :
Fax Functions - Fax to Email :
Conference System :
Conference Scheduling - Auto-Emails Notification :
Back-up - Recovery - Automation :
Yes - Scheduled+Manual - Configuration - Partial - Select & Full Back-up options + Call Recordings
Back-up to Remote Locations :
You save: $1,000.00
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Great for small business on the grow, and transitioning to VoIP + 4 analog primary lines or for use as back-up lines.

System FunctionalityVOICE/AUDIO & HD VIDEO CAPABLE Max. Call Capacity350 Processor6 Core Processor