Mitel 5560 IPT none Specifications Page 164

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Engineering Guidelines
150
The new MiTAI driver communicates with MiVoice Business using internal
MiVoice Business component (Data Services) port 5320.
The Microsoft PC to Phone application uses ports 5060 and 5061 for communication be-
tween the Live Communication Server and the 3300 ICP.
Resiliency
Some service providers may offer service resiliency. There are two different mechanisms for
making use of service provider resiliency; IP addressing or FQDNs (Fully Qualified Domain
Names). The ICP does not support service resiliency using IP addressing, but it can use FQDNs
to make use of service resiliency. For details, refer to the 3300 ICP Resiliency Guidelines.
Mitel resilient call state and call survivability is not supported in conjunction with SIP trunking.
911 emergency services
SIP trunking supports 911 emergency services. The System Administrator can choose whether
or not the SIP service provider should be the outgoing emergency route.
If the SIP service provider will provide support for 911 emergency services, the following
requirements must be met:
Ensure that the contract with the service provider covers 911 emergency service support.
If the SIP service provider passes this information to the PSTN when the call leaves the
SIP network then the PSAP will have the proper information for the emergency service.
Ensure that any geographical differences between the location of the phones and the
location of the service provider are addressed by the service provider.
Ensure that the CESID information is programmed.
The System Administrator should also provision the installation with a backup connection to
the local PSTN to maintain connectivity in the event the SIP trunk fails.
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