Below i am going to document some simple and very useful commands for asterisk. These commands will help you gather important information that can help you diagnose an asterisk based system. First enter the asterisk console: asterisk -vvvvvvvvvr Global Commands Show the entre asterisk dial plan dialplan show SIP Commands Viewing all sip peer status…
Tag: SIP
Bandwidth Utilised for VoIP
Calculating the bandwidth used for VoIP may seem like a daunting task, however it is rather simple, especially after you’ve understood some principles. VoIP calls consists of 2 main parts. The call management section is the part which gets the call going. It signals call initiation, the ringing, the disconnect, and other communication performed between…
How to Disable SIP ALG on a Thompson Router
SIP ALG is used to try and avoid configuring Static NAT on a router. Its implementation, however, varies from one router to another, often making it difficult to inter-operate a router with SIP ALG enabled with a PBX. In general, you would want to disable SIP ALG and configure one to one port mapping on…
Configuring a Yealink Phone…
In this article, i am going to walk you through setting up a yealink phone, so that it can make and receive calls via a SIP/VoIP/TISP Provider. Plug the phone in to a DHCP enabled network, click on menu, status and find the IP address of the phone. Type this addres in to a computer…
SIP/VoIP: Simple Trouble Shooting…..
In this article I am going to cover some simple and common steps that a user of a VoIP/SIP telephony system can do before calling they VoIP provider. No inbound calls: Firewall – Make sure the firewall is not blocking inbound connection to the phone/PBX. As a general rule make sure that UDP ports 5060,…
Using Wireshark to Capture Network Traffic
When troubleshooting certain issues, it is useful to know what information is being sent and received over the network. This makes it possible to close in on the source of the problem encountered. Information transmitted on the network can be captured using a network packet analyzer such as Wireshark. Wireshark (and network packet analyzers in…
Network Configurations Supported by 3CX Phone System
This guide illustrates how SIP, Audio and Data traffic is transmitted over the network when 3CX Phone System is used. This will depend on the backend infrastructure and network topology, and this guide helps administrators understand how 3CX operates in different scenarios. If a combination of topologies is used, 3CX Phone System will route…
Asterisk UK Ring Tone Settings
To Setup Asterisk with UK Ring tones and various other UK ringing tones such as engaged tone and other BT ring tones add / modify your existing indications.conf Personally I comment out the existing UK section and add the following UK section in indications.conf: [general] country=uk [uk] description = United Kingdom ringcadence = 400,200,400,2000 ;…
Troubleshooting a Direct Remote Extension
This step by step guide will help you troubleshoot a direct remote extension setup at home or at a remote office. Direct remote extensions can work but correct functionality cannot be guaranteed as there are many factors at play (such as: Network Topology, Router configuration, Firewall settings, etc.) and you may not have control over…
Configuring the Robin Smartview Video Doorphone with 3CX Phone System
If you need a simple SIP-based video door phone, the Robin Smartview should provide a simple solution. This document will explain the steps necessary to set up, configure, and test one of these devices for use with 3CX Phone System. In this example, we will assume that the IP Address of the Robin is 10.0.0.42,…