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3CX Phone System for Windows System for Windows
Page 56
Ports to use for internal calls
In this section you can enter the ports that will be used by 3CX Phone System for internal
calls. These ports will be used for calls between extensions and to external numbers
routed via a VOIP Gateway. (Since your VOIP Gateway will be located on your internal
network, calls via the VOIP gateway are considered internal calls).
Ports to use for external calls
This section allows you to configure which ports will be used for external calls via a VoIP
provider. The range you specify here must be opened on your firewall. For more
information see the section ‘Firewall configuration’ in Chapter 2.
Voicemail and FAX delivery settings
The voice mail and FAX delivery settings section allows you to configure an SMTP mail
server and a reply to address. This is needed in order for 3CX Phone System to send out
email notifications when a new voice mail arrives for a user. Optionally 3CX Phone
System can attach the voice mail as a wav file. Specify the SMTP server name or IP
address and a reply to address to be used as the sender name. If your SMTP server
requires authentication, enter a user name and password to use.
Special Voice Menu Extension Number: This is the number to dial for the retrieval of
Voicemail. The user will be prompted to dial his extension number and pin number before
obtaining access to his Voicemail.
Screenshot 21 – Voicemail and Fax Delivery Settings