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VoIP provider

3CX and Appia Announce Low-Cost, Quality VoIP Solution

April 24, 2012 - 2:43 pm | 2 Comments

3CX and Appia present a complete VoIP PBX solution to all 3CX Phone System customers after interoperability testing proves successful. London, UK and Traverse City, Michigan, USA – 24 April 2012 – 3CX, developer of the popular Windows-based VoIP PBX, 3CX Phone System, has announced that integration testing with Appia Communications, a leading VoIP provider in the USA, has proven successful and users of 3CX Phone System can now take advantage

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Low-Cost VoIP Solutions Available Thanks to 3CX and Masquevoz Interop

February 14, 2012 - 3:54 pm | 0 Comments

3CX complete successful integration testing with Spanish VoIP Provider, Masquevoz, to deliver an affordable, top quality VoIP PBX solution for all 3CX Phone System customers. London, UK and Valencia, Spain – February 20, 2012 – 3CX, developer of the popular Windows-based VoIP PBX, 3CX Phone System, has announced that interoperability testing with Masquevoz has proven successful, which allows 3CX customers to use Masquevoz as a VoIP Provider.

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Configuring a Gamma VoIP Provider Trunk

February 8, 2012 - 4:25 pm | 5 Comments

Note: This guide is for information purposes only. If you require assistance with a trunk provided by Gamma Telecom, please contact Gamma directly for assistance. If you are planning to integrate with a VoIP Provider within the Supported Providers List, please visit this page. To obtain reliable connectivity with a VoIP Connection from Gamma Telecom (in the UK), you will need to have 2 Network Interface Cards (NIC) installed on the 3CX Phone

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3CX and ippi to Provide Low-Cost, Quality VoIP Solutions

January 26, 2012 - 7:58 pm | 1 Comments

Quality and affordable VoIP PBX solution available to all 3CX Phone System customers thanks to successful integration testing with leading VoIP provider, ippi. London, UK and Paris, France – 26 January 2012 – 3CX, developer of the popular Windows-based VoIP PBX, 3CX Phone System, has announced that interoperability testing with ippi, who provide VoIP and telephony services worldwide to over 250,000 users, has proven successful. All customers who use 3CX

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Configuring DID with a VOIP Provider

August 5, 2011 - 5:09 pm | 0 Comments

Configuring DID with a VOIP Provider In some cases when you have a VoIP Provider with DID/DDI, you might encounter a situation when the VoIP Provider will not allow a call to go through. In the 3CX Phone System server activity log we can see the following message – Review Invite and Adjust Source identification. You will need to configure the source identification section in your VoIP Provider. When using

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VIDEO: Configuring VoIP Providers

April 29, 2011 - 5:04 pm | 1 Comments

Skills Covered by this Module What is VoIP Provider Account What types of VoIP Provider accounts can be connected to 3CX PhoneSystem About Unsupported VoIP Providers which do not have a plug-and-play template Firewall considerations for connecting VoIP Providers with 3CX PhoneSystem Running the Firewall Checker and interpreting its output Configuring a VoIP Provider account on 3CX PhoneSystem DID Configuration with a VoIP Provider Account Relevant Course Materials 3CX Supported

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Can I exchange a Fax between a VoIP Provider and a Grandstream GXW-4004/4008/4024?

February 7, 2011 - 10:41 pm | 0 Comments

It is not possible to use Grandstream 4004/4008/4024 as an ATA for a fax machine and send faxes through a VoIP provider, unless the VoIP Provider includes support for delivering T38 traffic to the Public IP Address in the packet header, rather than the Private IP Address declared by the Grandstream in the SIP/SDP packets it generates. Without this support from the VoIP Provider, this functionality is possible only if

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Outbound Rules – A Complete Example

July 20, 2010 - 4:44 pm | 2 Comments

Configuring Outbound Rules on 3CX PhoneSystem is a very simple affair if you have a single device or service which you deliver calls with – in most cases a single rule will be enough. But the Outbound Rules in 3CX PhoneSystem allows you to create much more complex rules – allowing you to not only select backup routes which come into effect when other routes fail, but also to select

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General Configuration Information when using VoIP Providers

May 3, 2010 - 2:20 pm | 3 Comments

This document will provide an overview of the more common concepts which need to be kept in mind when configuring 3CX PhoneSystem inside your network infrastructure, including the following topics: NAT Configuration STUN Resolution DNS Resolution in a VoIP environment Custom Configuration for particular network layouts Different types of VoIP Provider Accounts Custom Source Identification for VoIP Provider SIP message exchange

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Bandwidth Overhead over DSL connections

April 16, 2010 - 5:00 pm | 4 Comments

Internet Service Providers typically rate their connectivity services based on download and upload bandwidth. So for example you may subscribe to an aDSL connection rated at 2 Mbps (Megabits per Second) download and 1 Mbps upload. The traffic reaching the provider’s network from the aDSL modem is then routed to its eventual destination by traversing an ATM (Asynchronous Transfer Mode) network, and to do this, packets are broken up into

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The main SIP INVITE Header Fields explained

March 8, 2010 - 4:15 pm | 0 Comments

This article explains the main fields included in a SIP INVITE, which is sent to set-up a VoIP call. A SIP INVITE message contains typically between 4 and 6 header entries with contact information inside them. Different devices or providers use these headers in different ways and therefore, an understanding of the “normal” scope of these headers, together with a close analysis of log messages, will help to understand the

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3rd party supported VoIP Providers

February 9, 2010 - 6:41 pm | 0 Comments

Although we recommend the use of supported VoIP Providers, in some cases it may be necessary to use an unsupported VoIP Provider. 3rd Party Supported VoIP Providers 3rd Party supported VoIP providers have been tested by the VoIP Provider or by 3CX and at the time of testing they we’re known to work. You can find a list of 3rd party supported VoIP Providers here. Community tested VoIP Providers Community

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3rd Party Supported VoIP Providers

January 1, 2010 - 9:00 am | 0 Comments

The VOIP Providers listed below are not directly available in the ‘Add VOIP’ section of the 3CX Phone System Web Interface, but are known to work with 3CX Phone System and tested by 3rd parties.

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Configuring and testing a VoIP Provider for use with 3CX PhoneSystem

November 5, 2009 - 7:04 pm | 0 Comments

Note 1: The results generated from these tests should remain valid while the VoIP Provider keeps your account settings static. If your VoIP Provider account is reconfigured, it may be necessary to redo these tests. Note 2: The supported configuration for interoperability with VoIP Providers is for the PBX to be behind a WAN-to-LAN device, with Port Forwarding implemented correctly.

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What to look for in a VoIP provider?

August 19, 2009 - 2:11 pm | 0 Comments

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 which

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Receiving a Fax using a VoIP Provider with 3CX

July 8, 2009 - 8:30 pm | 16 Comments

Please note that this information does NOT apply to V8. For V8, please go to this link: http://www.3cx.com/blog/releases/3cx-fax-update11344/ For those of you who have been dreaming about the possibility of receiving a Fax over a VoIP Provider account, with certain VoIP Providers it may be possible. 3CX has provided a patch for V7.1 which, while NOT being a guaranteed works-for-all solution, does improve interaction with VoIP Providers which support Fax

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How can I adjust the configuration for unsupported VOIP providers or gateways?

July 5, 2009 - 5:20 pm | 0 Comments

How can I adjust the configuration for unsupported VOIP providers or gateways? 3CX performs extended tests with a number of VoIP Providers and Gateways. This allows us to create optimized templates for use with these tested Providers and Gateways, based on the information collected during the course of these tests. It is VERY STRONGLY RECOMMENDED that if at all possible, you use a VoIP Provider or Gateway from within the

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How to solve Source Identification issues

July 5, 2009 - 5:18 pm | 0 Comments

The source of a call must be identified for security. This FAQ explains how 3CX Phone System identifies the source of calls by default and how you can adjust the default to make it work with almost any VOIP provider.

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How to test your own VOIP provider

June 5, 2009 - 4:56 pm | 0 Comments

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

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STUN and VoIP – part 1

January 9, 2009 - 7:55 pm | 2 Comments

STUN stands for Simple Traversal of User Datagram Protocol (UDP) through Network Address Translators (NAT’s). It is used in several different network implementations and scenarios, one of which is VoIP. 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 or firewall, users typically encounter problems. Examples are one way audio during a

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