ShareThese are instructions to create a basic catch-all policy for all traffic generated from a machine running 3CX PhoneSystem which tags all traffic with a DSCP value of 56.

Share3CX Phone can be configured to connect to 3CX PhoneSystem from the same LAN, and also from a remote location. If 3CX Phone is going to be used from a remote location, you can also …

ShareVersion 9 of 3CX PhoneSystem introduces a more powerful control set for Forwarding Rules. Each extension can be in any one of 5 different statuses:

Available
Away
Out of Office
Custom #1
Custom #2

Version 9 also allows us to define, …

ShareCorrect Router Configuration is a key element in ensuring correct communications between 3CX PhoneSystem and external entities such as external extensions, VoIP Provider services, and other Bridged PBXs.
NAT and/or PAT
When a network host A sends …

ShareConfiguring 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 …

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Connecting an External Extension to 3CX PhoneSystem is often requested, and can be extremely useful for linking small remote offices and home workers. Here we get a shot at using other phones as External Extensions.
Using …

ShareThe whole point of provisioning phones is to eliminate the difficulties associated with manually configuring a large number of devices:

It is a tedious task
It can be very time consuming
Possibility of Human Error
Retaining a Standard Config …

ShareIf you have been asking yourself how to secure 3CX PhoneSystem, read on…

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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 …

ShareIMPORTANT This device has been tested for Voice using firmware version of “Wed Jun 10 11:53:59 2009”. The guide and template may not work for earlier or later versions of the firmware!
Configuration is a 2 …

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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 …

ShareThe 3CX Assistant is a useful tool that allows a user to better manage calls, and to collaborate with other users within the same group of Extensions.
3CX Assistant also includes some advanced functionality that can …

ShareNote 1: This guide has been tested with version 3.0.4. Be aware that different version may have different interface formats and functionality Note 2: Not all providers allow calls over 3G. If …

ShareIn order for 3CX Phone System to communicate successfully with VoIP providers and Remote Extensions, your firewall/router device must be configured for SIP operation. To maximize your chances of success, make sure you choose a …

Share3CX is now providing additional free training Webcasts on more advanced topics, and the next one is scheduled for Thursday 25 March 2010 at 1500hrs (GMT+1).
This will be presented via Microsoft Live …

Share3CX provides monthly free training Webcasts, and the next one is scheduled for Thursday 11 March 2010 at 1500hrs (GMT+1).
This will be presented via Microsoft Live Meeting using its built-in VoIP …

Advanced Webcast on Phone Provisioning and 3CX Assistant 9 February 2010 at 1500hrs (GMT+1)

Share3CX provides monthly free training Webcasts, and the next one is scheduled for Thursday 11 February 2010 at 1500hrs (GMT+1).
This will be presented via Webex using its built-in VoIP for audio – so there …

Share3CX provides monthly free training Webcasts, and the next one is scheduled for Thursday 14 January 2010 at 1500hrs (GMT+1).
This will be presented via Webex using its built-in VoIP for audio – so there …

ShareWhen configured correctly, you can use the Windows Time (W32Time) service as an SNTP/NTP server for both windows and non-windows SNTP/NTP clients.

Share3CX provides monthly free training Webcasts, and the next one is scheduled for Thursday 10 December 2009 at 1500hrs (GMT+1).
This will be presented via Webex using its built-in VoIP for audio – so there …

Share3CX provides monthly free training Webcasts, and the next one is scheduled for Thursday 26 November 2009 at 1500hrs (GMT+1).
This will be presented via Webex using its built-in VoIP for audio – so there …

ShareThe following is a complete list of ports that 3CX PhoneSystem uses in a default installation scenario:

TCP:80
…
If 3CX is installed for IIS, this is the default port number to reach the 3CX Management Console (http://<ip_of_pbx>/management) …

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How does direct SIP work?
The way direct SIP calls are initiated is very similar to the way sending an email works. A caller can call a callee from either a stand alone SIP phone which …

Share3CX provides monthly free training Webcasts, and the next one is scheduled for Thursday 12 November 2009 at 1500hrs (GMT+1).
This will be presented via Webex using its built-in VoIP for audio – so …