GrandStream UCM6204 IP-PBX Phone System Small Business

Contact us for a price
On backorder
Payment options
Our advantages


System FunctionalityVOICE/AUDIO + Limited Video Max. Call Capacity35 Processor2 Core Processor

GrandStream UCM6204 IP PBX Overview:

The Grandstream UCM6204 - IP-PBX Phone System is an excellent telecommunications model for small business who need 4 line PSTN/FXO capacity.

It includes all the same great built-in PBX telephone system features designed for big business users! No extra licensing costs required - this system features all functions in one complete low cost solution for any sized business operation.

This model is primarily designed for small business, medium size businesses who are growing and need ample room to expand and upgrade as needs change.

Grandstream UCM6204 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 (for Phone Extensions)
  • Call Park/Orbit, Hold, Transfer, Follow-me,
  • Time Mode Scheculing
  • Video Calling Capabilities
  • Automated System Back-ups
  • Fax to email, and much more!

GrandStream UCM6204 Main Specifications:

With a dual-core 1GHz processor, 1GB of RAM and 4GB of flash memory this IP PBX appliance provides secure enterprise-grade features. Moreover, no licensing fees are required and no additional costs per features or recurring monthly fees are necessary.

The GrandStream UCM6204 supports up to 75 concurrent SIP calls, up to 35 concurrent WebRTC calls, and up to 3 conference bridges.

  • SMB (Small / Medium Business) IP-PBX with 4 FXO (analog telephone line ports).
  • 2 FXS (analog extension ports).
  • Supports up to 500 users (SIP + 2 FXO), 50 SIP trunks, and up to 30 concurrent calls.
  • Dual 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.

UCM6204 IP-PBX Integrated 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.

GrandStream GS Wave App - iPhone and AndroidThe 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.

This application supports integration of up to 6 SIP accounts, 6-way voice conferencing, and allows users to monitor the company IP PBX (Grandstream's UCM6200 series IP PBX & UCM6510 IP PBX cmopatible) while utilizing speed dial with up to 24 virtual BLF keys (Presence watcher)). GS Wave also supports advanced SIP telephony features including call transfer, LDAP phonebook integration and more. With Grandstream Wave, business and residential 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.

GrandStream Affinity PC Console APPGrandStream UCM6204 Series IP-PBX Systems also allow for a PC console called Affinity. Dial and access callers from the PC console with select GXP170xx Series, GXP2170 or GXP2135 Series IP Phones.

GS Affinity is a Grandstream CTI application that offers a smooth call management and control interaction between the GXP17xx/GXP21xx color phone series and the computer running the application.

Some additional steps required to connect to your IP Phone Extension both on the phone and in the settings for the PC application.

Brand Manufacturer:
SKU - Product Code:
Equipment Use Type:
IP-PBX Phone System Main Box
System Functionality :
VOICE/AUDIO + Limited Video
Max. Call Capacity :
SIP Extension Capacity :
VoIP Trunk Capacity :
Analog (FXO) Phone Line Capacity :
Analog (FXS) Extension Ports :
Gigabit Network Ports:
1 WAN - 1 LAN + PoE Capable
Expandable Storage Memory:
Yes - USB + SD Card or powered USB drive
2 Core Processor
Internal Memory:
512 MB DDR RAM - 4 GB nand 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 :

UCM6204 Datasheet - English (datasheet_ucm6200_series_english.pdf, 534 Kb) [Download]

UCM 6200 Series Comparison Sheet (ucm6200_series_comparison.pdf, 1,039 Kb) [Download]