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…
Category: 3CX Phone System
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…
Automatic Deployment of 3CX MyPhone to Terminal Server Users
Group Policies provide the ability to deploy applications and configurations across hundreds or even thousands of computers in an organization. It is very important that procedures like these are tested thoroughly in a non-production environment before it goes live. This article describes how to distribute 3CX MyPhone Silverlight Out of Browser on your network or…
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 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…
Provisioning a Grandstream DP710 / DP715 DECT Phone
The following configuration steps have been tested with Grandstream handsets DP710 / DP715 with the firmware revision 1.0.0.5. Note that different firmware revisions may have a different web interface and/or different functionality. This guide is based on a new phone OR one that has been reset to factory defaults. If in doubt, reset the phone…
Provisioning a Panasonic KX-TGP500B01 DECT Phone
The following configuration steps have been tested with Panasonic KX-TGP500B01 using the KX-TPA50 handsets and firmware revision 22:58. Note that different firmware revisions may have a different web interface and/or different functionality. This guide is based on a new phone OR one that has been reset to factory defaults. If in doubt, reset the phone…
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…