For the benefits of all users, here is a guide to setup Obi110 with the 3cx Phone System version 10.This guide is divided into different parts to make it easier to follow. Please read the Subject title of later posts for those areas of interest to you I will try to use simple English terms so first time users of 3cx/SIP/voice gateways such as Obi110 can setup a working solution quickly. When I first started trying to setup my Linksys SPA 3102 with 3cx around May 2011, it was quite difficult following the jargons used in various forums so i can understand how first timers may feel lost. My apology to more advance users for the lengthy posts and 'twisted' SIP terms because I am still a beginner user of SIP. Please be patience, I have just started setting this up on 28 July 2010 and from home, i will slowly add in more settings along the way and it will go live when i bring it to the office. The pictures and more posts will be made with additional settings My apology if the pictures look fuzzy but due to the 50kb limitations of most images allowed on forum boards, I had to shrink the size and quality of the images to fit onto the forum screen. You can use the center button of your mouse (in firefox) to click on the picture which will display the better quality/larger size original pictures in a new tab. Before we start, please read the Obi110 user manual to do the most basic of things first. For example, i recommend a) Go to System Management->Device Update->Backup Configuration, click on all 3 checkboxes and do a backup of the Obi110 configuration along the way,especially when some settings worked. In the future, any changes that breaks the Obi110 you can then restore to a working solution. b) How to use a analog phone to access the Obi110 star menu to find out various settings of the Obi110. For example press *** on the phone followed by 1 to find out the IP address of the Obi110. Then enter this IP into web browser (eg firefox) to reach the build in configuration page of the Obi110 to change the settings. The default user AND password of the Obi110 is admin Note that Obi110 has a good user interface, any settings changed has the checkbox unticked, when you tick the box again, the default values will be used again. Hence from this point on, spot any unticked checkbox for the changed settings so I don't have to draw red boxes around them and clutter the image. Step 1 is to setup a static IP addresses for the Obi110 and the computer running the 3cx A static IP address is one that doesn't change (ie static) so that the computer running the 3cx Phone System software and the Obi110 can find each others on the network again if any rebooting occurs. The network setup part is beyond the scope of this guide so please google for knowledge In mysetup: Router IP is 192.168.100.1 Laptop IP is 192.168.100.26 (this is the computer running the 3cx Phone system Version 10) Obi110 IP is 192.168.100.24 Linksys SPA3102 IP is 192.168.100.25 You can set the static IP of the Obi110 as follow. Step 2 - Introducing the Setup Wizard of Obi110 From brand new out of the box, making a few settings changes on ONE single page on the Obi110 will enable it to work for some limited functions. (ie the phone will ring). This single page is known as the Setup Wizard page and it consolidate the most commonly used settings which when changed is 'mirrored' (ie copied) to the proper Groups and sub levels of the Obi110 configuration. You then only go into the various Groups and sub levels if you want to fine tune specific settings.