Instruction manual

System Features
INTER-TEL
®
5000 ADMINISTRATOR GUIDE – Issue 2.3, September 2007
Example of a Remote Site with an MGCP/SIP Gateway
Page 149
Figure 12.
Example of a Remote Site with an MGCP/SIP Gateway
The MGCP/SIP gateway is intended to connect to the PSTN. Connecting the MGCP gateway
to single line ports on other telephone systems is currently not supported.
When configured with an MGCP/SIP Gateway, the system can be programmed so that when an
Emergency Number such as 911 or 999 is dialed from an IP endpoint, the associated calling
name and number, not the system, is sent to the emergency responder operators.
PSTN
IP NETWORK
IP Endpoint
911
Operator
Located in Orange, California
Caller ID Display:
714-283-1600
714-283-1600
Phoenix, Arizona
480-961-9000
Remote Site
MGCP/SIP
Gateway
(i.e., AudioCodes)
Caller dials 911
Orange, California
Inter-Tel 5000
USA
USA
USA
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 phone 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 Inter-Tel 5000 Base Server 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, Inter-Tel rec-
ommends 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
Inter-Tel 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-in to the system Inter-Tel 5000 Base Server. If an endpoint connected to a power
failure bypass circuit is not available, users should make emergency calls from a local
phone not connected to the system.