Grandstream UCM6304A - PBX Phone System Voice/Audio

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The Grandstream UCM6304A IP-PBX is Voice / Audio only capable phone system designed for small business offices, start-up business and remote offices.

Our most popular IP-PBX Phone System for small business on the grow! Packed with features and options for small, medium and larger based businesses!

Our most popular and widely used PBX Phone System. Great for home office / small office (SOHO) or medium sized and branch offices needing site to site and remote worker capabilities with full telephony features.

Short Specifications:
Communication Functions Audio / Voice only
Analog Line Ports (PSTN/FXO) 4
VoIP SIP Trunk Line Capacity 150
Extension Capacity 1,000 IP Extensions + 4 Analog (FXS)
Concurrent Call Capacity 150
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Grandstream UCM6304A-Audio IP-PBX Overview

The Grandstream UCM6304A-Audio Only IP PBX is a 4 FXO, 4 FXS port IP PBX that brings robust functionality and enhanced functionalities to any small business. The UCM6304A offers business the ability to have a centralized device for voice, video calling, video conferencing, surveillance, data tools, analytics, mobility options, facility access, intercom and more.

The Grandstream UCM6304A is an easy to manage device that does not require licensing fees and can support up to 1,000 users and up to 150 concurrent calls. It features advanced technology including three Gigabit auto-sensing RJ45 network ports with integrated PoE+ and support for a NAT router. This enterprise-grade IP PBX can be integrated with third-party CRMs and PMS allowing for custom integrations.

When paired with Grandstream Zero-Configuration IP phones, you can simplify and unify your office telecommunications with remote office extensions and mobile device app (Free GrandStream App for Android and iPhone) to stay connected when out of the office.

Main PBX GrandStream UCM6304a Features

  • Supports up to 1,000 users and 150 concurrent calls.
  • Auto Discovery and Zero Configuration of GrandStream SIP endpoints.
  • Integrated 4 PSTN trunk FXO ports, 4 analog telephone FXS ports with lifeline capability and up to 120 SIP trunks.
  • Gigabyte network ports with Integrates PoE, USB, SD card.
  • Supports up to a 5-level IVR (Interactive Voice Response).
  • Up to 120 Voice Conference parties.
  • Built-in call recordings server; recordings accessible via web user interface.
  • Built-in Call Detail Records (CDR) for tracking phone usage by line, date, etc.
  • Supports multi-language auto-attendant and call queue to efficiently handle incoming calls.
  • Strongest possible security protection using SRTP, TLS and HTTPS encryption.
  • Supports GrandStream Integrated IP Phones + any SIP video endpoint that uses the H.264 & Opus codecs.
GS UCM6304A - all views screen shot

Grandstream UCM6304a PBX Highlights

Call Center - Includes Reporting Statistics, multiple call queue methods, automated call back, Agent Management, Agent monitoring: whisper / listen / call barge.

Live Call Recording.

Fax monitoring / internal fax to email solutions and extension user webGUI faxing capabilities.

Audio Conference Room system built in - with scheduling and automatic attendee email reminders, conference room codes for admins and attendees, conference room live recording.

Supports VoIP (Voice-Over-IP) SIP Trunks and Analog Telephone lines for expansion.

Automated regular back-ups to storage devices or offsite server.

Manufacturer Grandstream
Model UCM6304A
Analog / FXO Line Capacity 4
SIP Trunk Capacity 120
Concurrent Call Capacity 150
IP Extension / User Capacity 1,000
FXO Analog Extension Capacity 4
Gigabit Network Ports 1 WAN, 1 LAN, 1 HA + PoE Capable
Memory / Storage Expansion USB + SD Card
IVR / Auto Admins Up to 5 levels
Multi-Company Capable Yes
Call Recording Server Yes
CRD (Call Detail Records) Yes
Multi-Lanugage Support Yes
Supports SIP Video No
Security Yes, SRTP, TLS and HTTPS encyrption
Call Queue / Call Center Functions Yes

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