Mitel MIVOICE OFFICE 250, Руководство по установке и администрированию

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Network IP Topology
425
Private (Trusted) Networks
With regard to the last bullet in “Topology Requirements“ on page 424 , all configurations require
that the MiVoice Office 250 and AWC are on the same network. In the simplest form, all IP devices,
including phones, are on the same network as shown in the following illustration.
A Wide Area Network (WAN) provides the ability to connect two or more networks without necessarily
passing through a firewall/NAT. It essentially makes one larger private network. A Virtual Private
Network (VPN) uses public network facilities to provide private WAN connections. In either
implementation, there are no restrictions on topology as long as all IP devices are on the same
private network as shown the following illustration.
IMPORTANT
Although VPN links avoid the security and NAT addressing issues, the encryption of
VPN traffic sometimes introduces significant delays, making it unsuitable for VoIP
communications. This is a function of the network connections and the networking
equipment.