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VoIP How To - Page 16

The STUN Protocol and VoIP – Part 1

STUN stands for Simple Traversal of User Datagram Protocol (UDP) through Network Address Translators (NAT's). Typically it is used in several different network implementations and scenarios, one of which is in VoIP implementations. Because of the way protocols used in a SIP based VoIP call work, making calls between two SIP entities running behind NAT devices such as a router o [...]

By |September 9th, 2009|Comments Off on The STUN Protocol and VoIP – Part 1
IP Telephony

What Every Business Needs to Know About IP Telephony Internet Telephony (IP Telephony) is the term commonly used to define the transmission of phone calls over the Internet. This is regardless of whether traditional telephony equipment, computers and/or dedicated terminals take part in the calls and even if the phone calls are totally or partially transmitted over the Internet. [...]

By |September 2nd, 2009|Comments Off on IP Telephony
What to look for in a VoIP provider?

Once you decide to break your company free from a traditional phone system, one of things that make adopting IP Telephony attractive is the ability to use a VoIP provider to save on phone call costs. But, in the last few years, an overwhelming choice of VoIP providers have emerged following the booming in the IP PBX market and the staggering growth of VoIP. So, how do you know [...]

By |August 19th, 2009|Comments Off on What to look for in a VoIP provider?
How to test your own VOIP provider

Whilst 3CX includes a good number of supported VoIP providers, it is impossible for us to template all the VoIP providers out there and to test them.  If you have a VoIP provider you would like to use with 3CX that is not included, you can perform your own tests to see if the VoIP provider can be used with 3CX. This article explains the tests that you need to perform to be sure [...]

By |June 5th, 2009|Comments Off on How to test your own VOIP provider
New promptsets for 3CX! German, Dutch, French, Swedish and more

We have created a new voice prompts sets for many languages - and more to follow! These are the ones we have just created / updated and are available today: German (new) French (new) Swedish (new) Dutch (new) Danish (updated) Italian (updated) Polish (new) Japanese (new) To install the promptset: Go to system updates Select the language you want Click download (IGNORE that inte [...]

By |June 4th, 2009|Comments Off on New promptsets for 3CX! German, Dutch, French, Swedish and more
How to Configure a Cisco Router with the 3CX Phone System

This guide is outdated please refer to the latest guide. Introduction This document describes the configuration of a Cisco Router for the use with 3CX Phone System. Status In general Cisco routers are know to work correctly and can be used as gateway in front of a 3CX Phone System to connect Voip Provider, direct Remote Extensions (STUN) and 3CX Tunnel connections. Due to the c [...]

By |June 3rd, 2009|Comments Off on How to Configure a Cisco Router with the 3CX Phone System
How Microsoft Exchange Server 2007 / 2010 Unified Messaging works

Edit 16th September 2015: Please note that 3CX Phone System only works with MS Exchange Server 2013 and 2013 SP1 Introduction Microsoft Exchange Server Unified Messaging communicates with a PBX via the SIP protocol. However: 1) Only TCP transport is used. UDP transport is not supported. 2) Microsoft Exchange Server does not support authorization. It works like a bridge. That me [...]

By |June 2nd, 2009|Comments Off on How Microsoft Exchange Server 2007 / 2010 Unified Messaging works
Some benchmarks tests - no dedicated server needed!

We have been performing a number of bench mark tests, in order to give 3CX users an idea what sort of memory and processing power is required by a 3CX installation. First off - in many cases a dedicated server is NOT required. Modern servers have ample processing power to handle 3CX and other server applications on one box. This is also a huge advantage compared to an appliance [...]

By |May 14th, 2009|Comments Off on Some benchmarks tests - no dedicated server needed!
DoS and Flood Protection in Firewall Configurations

So you have now installed 3CX Phone System, your VoIP Provider account registers fine, a couple of  successful test calls prove that all is working well. It's now time to put things into production. Then you discover that as soon as you have more than a couple of simultaneous calls, things stop working correctly!!!Calls do not come in, registrations fail, unexplained one-way-au [...]

By |May 5th, 2009|Comments Off on DoS and Flood Protection in Firewall Configurations

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