• Welcome
  • U3PBX Specifications
  • Purchase U3PBX

Welcome to Sipbox.co.uk

The SipBox is an IP VoIP PBX designed for the small office and home office user.

A recent survey revealed that over 90% of businesses in the UK employed 10 people or less. With the growth in take up of SIP and VoIP PBX systems, we realised that there was a place in the market for a device especially targeted towards this user base.

Experience told us that many small businesses were currently using devices that were far more powerful than what they actually needed yet still having the same vulnerabilities and points of failure that components like fans and spinning disks introduced.

Experience in field service showed that in the majority of cases failure resulted from one of three main areas. The three main areas of failure we found in VoIP PBX systems currently available are PSU, hard drive failure or components overheating and failing as a result of fans failing.

The SipBox addresses all of these issues whilst delivering a rock solid VoIP IP PBX for 20-30 users with up to 10 concurrent calls. In testing we will show it comfortably handling more than this but we would not be able to recommend you use it this way.

Block Diagram

Board Detail


Processor Samsung Exynos4412 Prime Cortex-A9 Quad Core 1.7Ghz with 1MB L2 cache
Memory 2048MB(2GB) LP-DDR2 880Mega data rate
3D Accelerator Mali-400 Quad Core 440MHz
Video supports 1080p via HDMI cable(H.264+AAC based MP4 container format)
Video Out micro HDMI connector
Audio Standard 3.5mm headphone jack
HDMI Digital
LAN 10/100Mbps Ethernet with RJ-45 Jack ( Auto-MDIX support)
USB2.0 Host High speed standard A type connector x 3 ports
USB2.0 Device ADB/Mass storage(Micro USB)
Display HDMI monitor
Storage (Option) MicroSD Card Slot
eMMC module socket
Power (Option) 5V 2A Power
System Software Linux : Xubuntu 13.10 or latest version
Android : u-boot 2010.12, Kernel 3.0.x, Android 4.x
Full source code is available now.
PCB Size 83 x 48 mm
Weight 48g including the heat sink

Purchase SIPBox U3PBX

  • Pre-Built with FusionPBX and Freeswitch
  • Recommended for up to 30 users
  • Easily support 30 concurrent calls
  • No need for setup, Just add credit
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