Grandstream UCM6304A Audio IP PBX, 1000 Users, 4 FXS + 4 FXO

Overview

A medium office with several landlines and analogue phones, but no need for video meetings, can run a phone system (IP PBX) in its own building without a rack. The Grandstream UCM6304A is a voice-only phone system for up to 1000 users from the UCM6300 Audio series, with instant messaging and audio meetings built in, four analogue phone ports (FXS) and four landline ports (FXO), in a compact desktop or wall-mount unit.

Is it right for you?

• Suits medium offices with up to 1000 users and up to 150 calls at once (120 with SRTP encryption).
• Suits offices that want voice, instant messaging and audio meetings but not video: unlimited rooms, up to 7 public rooms at once and 120 participants in total.
• Suits offices keeping four analogue phones or fax machines (FXS) and four landlines (FXO) alongside IP phones and Session Initiation Protocol (SIP) trunks.
• Choose the UCM6302A for a smaller office, or the UCM6304 if you want video meetings.

Key features

• Up to 1000 registered users and 150 concurrent G.711 calls (120 with SRTP encryption).
• 4 FXS (analogue phone) and 4 FXO (landline) RJ11 ports, all with power-fail lifeline, so an analogue phone can still reach the landline in a power cut.
• Audio meetings and built-in instant messaging: unlimited rooms, up to 7 simultaneous public rooms and 120 participants in total.
• Three Gigabit network ports that work in switched, routed or dual mode, with PoE+, and a NAT router mode, so it can sit behind your router or act as one for the phone network.
• Call queues with skills-based distribution and up to 64 IVR (voice menu) layers.
• Free Wave app for desktop, web and mobile, so staff on the move use their extension from a laptop or phone.
• Secure boot, a unique certificate, a random default password and hot standby high availability.
• A 320 x 240 colour touch screen on the unit, two USB 3.0 ports and an SD card slot.

What else you need

• A SIP desk phone, Wi-Fi phone or the Wave app for each user. Grandstream phones get zero-configuration provisioning; other makes register over standard SIP. Phones are bought separately.
• SIP trunks from a provider for outside calls, or four landlines (FXO) on the FXO ports. Trunks are bought separately.
• A network switch for the phones, connected to the LAN port, and your internet router, connected to the WAN port.
• Power from the included 12 V DC adapter (2 A output). The PBX itself needs mains power or an uninterruptible power supply (UPS) to keep working in a power cut; only the analogue ports have lifeline.
• Only if staff work from outside the office, a UCM RemoteConnect (UCMRC) cloud plan, which handles NAT traversal for remote users and devices.

Installation

A phone system installer or IT team should set it up. The hardware side is a desktop or wall-mount job: connect the WAN port to the internet router and the LAN port to the phone switch, then plug in the adapter. The rest is configuration in the web interface: extensions, trunks, voice menus, queues, voicemail and meeting rooms.

The unit measures 270 x 175 x 36 mm and is rated for 0 to 45 °C, so it belongs in a dry, ventilated spot such as a network cabinet or office shelf.

Software and licences

The system runs on an Asterisk 16 based operating system. The Wave app is free and runs on desktop, web and mobile. UCM RemoteConnect is a cloud plan for remote users, bought separately. Grandstream Device Management System (GDMS) provides cloud management, and a full API allows integration with CRM (customer relationship management) and hotel PMS (property management system) software.

Before you buy

• Phones and SIP trunks are bought separately.
• If you want video meetings, look at the UCM6304 in the UCM6300 series instead.
• It is a desktop or wall-mount unit, not a rack unit.
• Built-in analogue capacity is 4 FXS and 4 FXO.