Mitel MIVOICE OFFICE 250, Руководство по установке и администрированию

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Phones
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• NAT Traversal for IP Phones : The MiVoice Office 250 supports the connection of IP phones
from the public network when the MiVoice Office 250 is located inside a local area network (LAN).
To accomplish this near-end NAT traversal capability, the MiVoice Office 250 is programmed
with both its Native IP address and the corresponding statically NATed public IP address. The
platform being programmed with both addresses allows system-defined IP phones calling in
from the Internet to traverse the NAT/firewall.
You can program the MiVoice Office 250 so that each IP phone could use either the Native
address or the NAT address. The Native NAT Type would be selected when the phone was
located inside the NAT, and NAT would be selected when the phone was located outside the
NAT. In other words, the MiVoice Office 250 could be programmed with corresponding IP
addresses for communicating with each IP phone, whether the phone was located inside or
outside the NAT/firewall.
• Automatic Detection for NAT Traversal : The Automatic NAT Detection feature takes near-end
NAT traversal one step further. An IP phone designated with the Auto NAT Type automatically
selects the appropriate NAT or Native IP address. This feature allows the IP phone to be moved
from inside a NAT to outside and back again without programming intervention.
If the default Auto NAT Type is designated for an IP phone, the Auto NAT Detection feature
determines the correct IP address to use when the phone comes online. Once the NAT type is
determined, the IP phone uses the setting for all calls. However, the NAT IP address associated
with the system must be programmed manually in order for the NAT detection test to run.
This feature does not work with IP Gateways, IP trunks, Mitel wireless 8664, 8665, and 8668
phones, any Mitel IP phones in SIP mode and third-party SIP phones, and Mitel phones.
Firmware on these phones cannot run the Auto NAT Detection test. For these phones, the
installer needs to manually select the NAT Type setting.
Data Port Modules
The following Data Port Modules can be connected to Executive, Professional, Standard, or
Associate Display phones or to 8520 or 8560 phones:
•
PC Data Port Module (PCDPM) : A digital device that is connected to the Executive Display,
Professional Display, Standard Display, Associate Display, 8520, or 8560 Phones and supports
data transmission between the phone and the phone system for DSS/BLF, off-hook voice an -
nounce, or Desktop Interface. A PCDPM is required if a Modem Data Port Module or DSS/BLF
Unit will be installed, or if the user wishes to receive OHVA calls. A PCDPM is not required for
the PKM 16.
• Modem Data Port Module (MDPM) : An analog device that can be used with a PCDPM and
connects to a modem for data applications or to a single line phone. The port itself has an
individual extension number and complete phone programming setup including its own trunk
access and toll restriction information.
Special programming is required to enable the Executive, Professional, Standard, and Associate
Display phones and 8520 or 8560 phones to support some of the PCDPM and MDPM functions.
For more information, refer to the “Phones and Devices” chapter in the
MiVoice Office 250 Features
and Programming Guide
.