Specifications

Chapter 5: Installation
Running Cables to Endpoints
Mitel
®
5000 Installation Manual – Issue 3.0, October 2008 Page 5-63
WARNING
Possible Delay in Local Emergency Response to Remote Sites. IP and SIP endpoint users
should be alerted to the following hazardous situations:
• If an Emergency Call endpoint number is dialed from an IP or SIP endpoint located at a
remote site that is not equipped with a correctly configured gateway, the call will be
placed from the location where the 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 SIP/MGCP gateway trunk(s) for dial tone.
• If uninterruptible power supply (UPS) protection has not been installed as part of the
Mitel 5000 system, IP and SIP endpoints 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 endpoint users can only
use a single line endpoint connected to one of the power failure bypass circuits built into
the system chassis. If a endpoint connected to a power failure bypass circuit is not
available, users should make emergency calls from a local endpoint that is not
connected to the system.
For details about the Power Failure Bypass feature, see “Back of the Chassis” on page 3-8.
For installation instructions, see “Built-In Ports for WAN Fail Survivability” on page 5-27.