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 …

3CX Phone System v10 and Grandstream deliver on strategic cooperation with completely integrated, best in class and best value PBX solution.
London, UK and Brookline, MA. USA, June 6th 2011 – 3CX, developer of the award-winning …

If you need a simple, SIP-based door phone, the Robin Compact SIP C01040 and C01041 provide a simple and inexpensive solution. This document will explain the steps necessary to set up, configure, and test one …

In certain situations we need to install an analog telephone. If you also need MWI (Message-Waiting Indicator) functionality, you may encounter compatibility issues. But with the right equipment, this can be easily accomplished.

Upgrading firmware of Cisco phones from the 3CX Mgmnt Console

3CXPhone for iPhone is here! We’ve gotten the go-ahead from Apple and it is available immediately via the Apple Appstore.
3CXPhone for iPhone is a VoIP phone for Apple iPhone, iPads and iTouch devices running iOS 4.0 …

In this example we will demonstrate how to perform a blind and attended (consultative) transfer using a Yealink. We will assume that an incoming call will be received on the Yealink phone which is registered …

In this example we will demonstrate how to perform a blind and attended (consultative) transfer using a Linksys SPA962. We will assume that an incoming call will be received on the Linksys phone which is …

Using the recommended Firmware version is one of the keys for successful interoperability with 3CX PhoneSystem. From time to time, 3CX will release updates to the configuration guides that often include additional functionality that takes …

In this example we will demonstrate how to perform a blind and attended (consultative) transfer using a Grandstream GXP2020. We will assume that an incoming call will be received on the Grandstream phone which is …

We’re interested to see which of the many phones that 3CX supports are most popular. Let us know by voting for your favorite IP phone!

The 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 …

In this example we will demonstrate how to perform a blind and attended (consultative) transfer using a Snom 360. We will assume that an incoming call will be received on the Snom phone which is …

In this example we will demonstrate how to perform a blind and attended (consultative) transfer using a Cisco IP Phone SPA525G. We will assume that an incoming call will be received on the Cisco phone …

In this example we will demonstrate how to perform a blind and attended (consultative) transfer using a Polycom Soundpoint IP 650. We will assume that an incoming call will be received on the Polycom phone …

Cisco SPA Phones have the ability to look up for phone numbers and contacts in an Active Directory/LDAP. For this a template needs to be created and  the Cisco Phones need to be re-provisioned with …

Note: This guide has been tested with firmware version pos3.08.2.00. Be aware that different firmware revisions may have different functionality.
This document will describe how to get a Cisco 7940 with SCCP (Skinny) protocol, convert it …

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

Ten tips for a more secure IP PBX System
If you are in charge of a VoIP system or planning to deploy one, then VoIP security is probably one of the considerations. In this article we …

3CX PhoneSystem is supplied with pre-configured templates for the most popular SIP Phone vendors on the market.
These pre-configured templates include the settings which the majority of users need. Occasionally, however, it may be necessary to …