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: VoIP
Simple Asterisk Phone System…
Below I detail how to set up a basic asterisk dial plan with 2 extensions, a SIP Trunk provider, and incoming calls ringing both extensions. in /etc/asterisk/sip.conf add: [100] ; extension 100 username=100 secret=100 host=dynamic nat=yes type=friend qualify=yes context=phones [101] ; extension 101 username=101 secret=101 host=dynamic nat=yes type=friend qualify=yes context=phones [SIP-PROVIDER] ; Trunk to/from SIP Provider type=friend…
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…
Manually Configuring a Multicast Paging Ring Group to work with Yealink T20, T22, T26, T28, T32, T38
Be aware that different firmware versions may have different web interface formats and functionality. For further support, please visit Yealink here From 3CX Phone System Ring groups can be used to facilitate multicast paging. Note that 3CX Phone System facilitates multicast paging along the address range: 224.0.0.0 – 224.0.0.255 and port range which is not already…
How to Disable SIP ALG on Netgear Routers
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 Zyxel P-662H-D1 Router with 3CX Phone System
In this article, we will see how to configure a Zyxel P-662 to allow traffic required by 3CX Phone System. This is a 2 step process – first, we will configure the firewall to allow VoIP traffic from the internet and secondly we will configure the firewall to route the VoIP traffic to 3CX Phone…
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…