Welcome to 3CX Blog

DIDs and extensions will be one to one

In the 3CX, if the sip trunk have many DIDs, the DIDs and extensions can be set as one to one, it means when one extension calls out through the sip trunk, one specific DID will display on the screen of the callee. When anyone dials the DID number from outside , the specific extension will ring too. In order to [...]

3CX Mailbox Server Test 5.7.0 Denied Error

Overview The mailbox server in the 3CX server is very important for the 3CX system. The mailbox server is used to send various notification emails, such as sending welcome emails to extension users and sending various types of event emails to designated extensions. Our free version of 3CX currently uses an SMTP [...]

By |December 23rd, 2019|0 Comments

How to block the call from 3CX IVR extension

How to block the call from 3CX IVR extension Overview If we create a Digital Receptionistextension (Also called IVR extension) when we using 3CX system, then after the call is sent to the IVR, other extension numbers can be dialed directly from the IVR extension. Many companies will bind the company's [...]

By |December 20th, 2019|0 Comments

How to use Putty to connect to Alibaba ECS that using SSH key pair

How to use Putty to connect to Alibaba ECS that using SSH key pair Why use a key pair for Alibaba Cloud ECS? Alibaba Cloud SSH key pair is a secure and convenient login authentication method. It consists of a public key and a private key, and only supports Linux instances. The SSH key pair generates a pair of ke [...]

By |November 27th, 2019|0 Comments

What is the Announce Caller (Rebound)?

What is the Announce Caller (Rebound)? Overview Some of our customers will see the option “Announce Caller (Rebound)” when configuring the extension settings in the 3CX system. Many users are not sure what this option means and what it does. In this article, we will introduce the meaning of the option “Announce [...]

By |November 19th, 2019|0 Comments

Analyze the reason why a call to an IVR extension failed

Analyze the reason why a call to an IVR extension failed Background: We have a customer tell us that only one number of their external DID number can be dialed. Other external numbers are immediately hanged after dialing. The customer uses 3CX connected FXO port gateway to make outbound phone calls. Solution: Be [...]

By |November 12th, 2019|0 Comments

How to configure security rules on Alibaba Cloud platform for 3CX

Background: 3CX is an open-platform, software VoIP phone system that works with popular IP Phones and SIP trunks whether on-premise or in the cloud. We have many customers who choose Alibaba Cloud platform to deploy 3CX, some customers don’t know hwo to open the ports for 3cx? In this document we will describe h [...]

By |October 23rd, 2019|0 Comments