Mitel MIVOICE OFFICE 250, Руководство по установке и администрированию

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Network IP Topology
431
Configuring Near-End NAT Traversal for IP Phones
The MiVoice Office 250 supports traversing near-end NAT using statically assigned NAT addresses.
An administrator configures the NAT device to always associate a specific public address with the
MiVoice Office 250 native address. This is also known as “Full Cone NAT.” A system equipped with
an optional PEC-1 has two IP addresses, so it requires two static NAT assignments. The static NAT
assignment and the IP phone configuration are illustrated below.
Base Server
To set up Near-End NAT Traversal for IP Phones on a Base Server-only system:
1. Configure the firewall/NAT device for a static mapping. This associates a public IP address with
the MiVoice Office 250 native private address.
2. In the DB Programming IP Connections folder, program the NAT IP Address to be the public
address that was associated with the native private address in step 1 .
IMPORTANT
Configure the firewall security settings for the newly mapped IP address(es) as
described in “Port Usage and Protocols” on page 442. Depending on how the
particular firewall defaults its security, failure to configure the security may result in
no-audio conditions or security vulnerabilities.