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3CX Phone System for Windows System for Windows
Page 20
Port 5090 (TCP) for the 3CX Tunnel (if you plan to use the tunnel for remote
extensions)
Port 9000-9003 (or higher) (UDP) (send & receive) for RTP communications, which
contain the actual call. Each call requires 2 RTP ports, one to control to call and one
for the call data. Therefore, you must open twice as many ports as you wish to
support simultaneous calls via the VOIP provider. For example, if you want to allow
4 people to make calls via the VOIP provider simultaneously, you must open port
9000 to 9007.
Note that the above port ranges are the default ports in 3CX Phone System. You can
adjust these ports from the Management Console, in the General > General Settings
page. In this page, you can configure the ports to be used for internal calls, and the ports
to be used for external calls being made via a VoIP provider.
Firewall installed on the 3CX Phone System machine
If your phone system is running on the internal network behind a firewall, it is not
necessary to enable the firewall on the machine running 3CX Phone System. However if
you wish to do this, then you will have to open the following ports:
Port 5060, 5480, 5482, 5483, 5485 for 3CX Phone System
Port 5090 (TCP) for the 3CX Tunnel (if you plan to use the tunnel for remote
extensions)
Port 7000 to 7500 (UDP) for internal leg of calls to VoIP providers or external
extensions.
Port 9000-9003 (UDP) for the external leg of calls to VoIP providers or external
extensions. Each call requires 2 RTP ports, one to control the call and one for the
call data. Therefore, you must open twice as many ports as you wish to support
simultaneous calls via the VOIP provider. For example, if you want to allow 4 people
to make calls via the VOIP provider simultaneously, you must open port 9000 to
9007.
Note that the above port ranges are the
default ports in 3CX Phone System. You can
adjust these ports from the Management console.
The 3CX Extension user manual
The 3CX Extension manual explains users how they can use 3CX Phone System – it
includes explanations of how to use the voice mail system, call parking, the MyPhone
user portal and so on. The latest manual can be downloaded from here:
Installing the 3CX VOIP Phone
The 3CX VOIP Client is a small Windows application that allows you to make and receive
calls via your desktop phone or using a headset connected directly to your computer. You