Mitel MIVOICE OFFICE 250, Руководство по установке и администрированию

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MiVoice Office 250 Installation and Administration Guide
480
Introduction
This chapter describes the phones and features supported on the MiVoice Office 250. The system
supports the following phone types:
•
IP Phones below
• Digital Telephones on page 500
• SIP Phones on page 508
• Analog Single Line Phones on page 509
• Administrator Phones on page 511
IP Phones
The MiVoice Office 250 supports various Internet Protocol (IP) phones. These phones provide the
functionality that allows you to make calls through the IP network on the MiVoice Office 250.
Except for the features listed in the bullets below, hard IP phones operate the same as traditional
digital telephones installed directly on the system. The following list summarizes the features that
are
not
supported on hard IP phones.
Hard IP phones:
• Cannot use a PC Data Port Module (PCDPM) or Modem Data Port Module (MDPM).
• Do not support Desktop Open Architecture Interface (OAI) applications.
• Do not have a secondary voice path and cannot support Off-Hook Voice Announce (OHVA).
• Generally do not support Enhanced Speakerphone Mode (except the 8600, 8664/8665/8668
phones).
WARNING
Possible Delay in Local Emergency Response to Remote Sites.
IP phone users should be alerted to the following hazardous situations:
• If an Emergency Call phone number is dialed from an IP phone located at a remote site that is
not
equipped with a correctly configured gateway, the call will be placed from the location where
system chassis is installed rather than from the location where the emergency call is made.
In this situation, emergency responders may be dispatched to the wrong location. To minimize
the risk of remote site users misdirecting emergency responders, Mitel recommends regular
testing of MGCP/SIP gateway trunk(s) for dial tone.
• If uninterruptible power supply (UPS) protection has
not
been installed as part of the MiVoice
Office 250, IP and SIP phones will not operate when electrical power fails either at remote sites
or at the main system location.
To place calls during a power failure in this situation, IP and SIP phone users can only use a single
line phone connected to one of the power failure bypass circuits built into the system chassis. If a
phone connected to a power failure bypass circuit is not available, users should make emergency
calls from a local phone not connected to the system . For more information about the Power
Bypass feature, refer to the Installation chapter in the
MiVoice Office 250 Installation Manual
.