3com SuperStack 3 NBX Manual De Usuario

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C
HAPTER
 2: D
IAL
 P
LAN
by a firewall. Configure the firewall to allow access to port 25 on the NBX 
system only from valid VPIM systems that need to deliver VPIM messages 
to the phone system. The NBX SMTP server is started only when the 
system has a valid license for VPIM.
To send a voice mail message to a user on another VPIM-compliant 
system, an NBX user first composes the voice mail message, using the 
commands in the user’s voice mailbox. Depending on how the system’s 
dial plan is configured, the user can specify the destination in two ways:
If the dial plan is configured for site codes, the user specifies the 
destination site code followed by the star key (*) and the extension of 
the person for whom the voice mail message is intended.
If the dial plan is configured without site codes, the user specifies the 
extension of the person for whom the message is intended. This is 
easier, but requires that each site use a unique extension range for 
telephones.
A user who knows the IP address of a VPIM-compliant voice mail 
system and the extension of a person who uses that system can 
compose a voice mail message and then send it using these steps:
Dial the IP address, pressing the * key after each field in the 
address, including the last field.
Dial the extension of the person followed by #.
The system administrator configures the dial plan and decides whether to 
use site codes or unique extension ranges.
Configuring the 
Dial Plan for VPIM
To fully define a VPIM connection between two NBX systems, you must 
create entries in the dial plan for the following items:
The digit sequence that a telephone user must dial to access the VPIM 
connection
The route number that is used to access the other NBX system
The extension list to which the VPIM route belongs
The operations that must be performed on the dialed digits in order to 
create the appropriate outgoing digit sequence