![]() If you’ve made changes in FreePBX and they haven’t taken effect, look out for Apply Config in the top-right corner. ![]() When complete, the number of options and screens may be a bit bewildering, but don’t worry: RasPBX is very sensibly set up by default and we don’t need to change anything to get up and running. FreePBX will now start up and walk you through a simple process where you’ll create an administrator account for the system. If this doesn’t work, establish the IP address of your Pi using a tool like Fing for iOS/Android, as we’ll need it later. Once you have the basic configuration in place, open up a web browser then open. Installation requires a few steps and these are detailed here. Download the image from and burn to a microSD card (we used Etcher). Luckily, some dedicated folks have put together RasPBX, a Stretch distribution with Asterisk installed and including FreePBX, a web-based front-end. To paraphrase: with great power comes great configuration. The capabilities and features of this product are staggering, especially given its open-source status. All being well, the phone’s IP address will be displayed.Īsterisk is a popular and mature software implementation of a traditional PBX. Allow the phone to restart and then check Setup > Network. On this particular phone range, it can be done by going into Setup (the ‘paper’ key) and then ‘Factory Reset’. To avoid frustration later on, it’s vital to ensure that each phone has been fully reset to defaults and is successfully talking to the network. VoIP is not one protocol but many working together and the range of possible settings runs into the thousands. If you’ve procured your phones second-hand as we did, they’ll probably need resetting before going any further. The phone can be set to take priority over the data if required (QoS or quality of service) so phone calls still work if you’re downloading the latest Fortnite update. Most VoIP phones feature a passthrough Ethernet connector, so you can chain other devices without using up all your switch’s ports. For best performance, we’re going to wire everything up ‘the old-fashioned way’ using a small Ethernet switch. ![]() As a result, many VoIP devices, including our choice of phones for this tutorial, do not feature WiFi. VoIP systems rely on fast networks with low latency to maintain audio quality. Consider a fast switch for best performance. VoIP audio codecs rely on a good network. Finally, ‘soft’ phones such as Zoiper can run on iOS/Android devices or on your computer. ![]() Alternatively, you can use an ATA converter that adapts a traditional PSTN phone to VoIP (although you lose some features). Many other types of phone are available, including DECT-style cordless. These are older devices, so you can pick them up on auction sites for as little as £10. We’re using the popular Linksys SPA941 and Cisco SPA504G SIP VoIP phones. You’re not constricted to a traditional phone. One of the great things about VoIP phone systems is the flexibility. Click here to download your free digital edition of The MagPi issue 78. ![]() This tutorial first appeared in The MagPi 78 and was written by PJ Evans. At home, why not have phones for your study or kitchen? Leave a voicemail for the dog! Small businesses can get up and running with a two-phone PBX including all the cool features for under £100. Yet, with the help of Voice over Internet Protocol (VoIP) and the popular open-source telecoms platform Asterisk, the humble Raspberry Pi can match the features of the most expensive PBX systems. Even a simple system can cost thousands to implement. Traditional private telephone exchanges (PBX) are essential for businesses but come at a premium. ![]()
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