Mitel Inter-Tel 5000, Руководство по установке и обслуживанию

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Chapter 5: Installation
Installing SIP Gateways
Inter-Tel
®
5000 Installation Manual – Issue 2.4, May 2008
Page 5-177
Installing SIP Gateways
Support is provided in the system for local Public Switched Telephone Network (PSTN)
connectivity using the IP resources in the Inter-Tel CS-5200/5400/5600 Base Server and a third-
party (Session Initiated Protocol (SIP) gateway. The IP Resource application expands the
support of 25 IP endpoints/Single Port LSAs/SoftPhones to include Loop Start Adapters (Single
Port LSAs). Support for IP-based local loop requires no software feature units.
Up to 25 IP resource ports can be programmed to be loop start adapter ports (SIP/MGCP
gateway trunks). The IP Resource application statically maps IP resources on a one-to-one,
non-blocking basis for each loop start port within the SIP/MGCP device.
The following new SIP gateways are available through the Inter-Tel
®
CommSource
®
division:
•
Quintum
®
AFT 400 SIP gateway
•
AudioCodes
™
MP-114 SIP gateway
For configuration instructions and additional information, see page 5-179 .
When configured with a SIP gateway, you can program the system so that when an Emergency
Number is dialed from an IP device, the calling name and number associated with the IP
device, not the system, is sent to the emergency call operators.
With regard to the Service Type feature, call processing supports Caller ID on the Single Port
LSA. The Single Port LSA has built-in Caller ID receivers. It does not use shared Caller ID
resources within the system. The resource manager within Call Processing is modified to have
Caller ID receivers as an attribute for this device type and to use the local Caller ID receiver. If
the service type is set to Caller ID, Caller ID messages are passed up through the IP resource
application to Call Processing. By default, it is set to None.
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 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, Inter-Tel
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
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 chassis. If an endpoint connected to a power failure bypass circuit is
not available,
users should make emergency calls from a local endpoint not connected to the system. For
details about the Power Failure Bypass feature, refer to the Inter-Tel 5000 Features and
Programming Guide (part no: 580.8006).