Mitel 470 System Manual page 20

System Overview
Mitel Advanced Intelligent Network (AIN)
In an AINseveral communication servers of the MiVoice Office 400 series can be con-
nected up to form a homogeneous communication system. The single systems are
connected with one another via the IP network, thereby forming the nodes of the over-
all AIN system One node acts as the Master and controls the other (satellite) nodes. All
the features are then available at all the nodes.
No call charges are incurred as the internal voice traffic between locations is routed via
the system's own data network. All the AIN nodes are configured and set up centrally
via the Master.
If a node is isolated from the rest of the AIN by an interruption in the IP connection, it
restarts with an emergency configuration after a set amount of time. The connections
are then routed to the public network via local links, for example with ISDN or SIP con-
nections, until contact with the AIN is restored.
For the Virtual Appliance communication server, AIN networking (Virtual Appliance as
master) with at least one satellite is mandatory.
SIP networking
Networking based on the open global SIP protocol is the universal way of connecting
several systems with one another via the private data network or the internet. MiVoice
Office 400 communication platforms can be used to network up to 100 other Mitel sys-
tems or SIP-compatible third-party systems. All the main telephony features such as
call number and name display, enquiry call, hold, brokering, call transfer and confer-
ence circuits are supported. The transmission of DTMF signals and the T.38 protocol
for Fax over IP between the nodes is also possible.
Virtual and leased-line networking via BRI/PRI interfaces
With this type of With this type of connection the nodes are connected via basic rate in-
terfaces (BRI) or primary rate interfaces (PRI).
With virtual networking all the nodes are connected via the public ISDN network. This
type of networking is particularly well suited for geographically dispersed locations
which have such a low volume of calls between locations that leased lines or setting up
a private data network are not worthwhile. The range of services available in a virtual
network depends on the range of services offered by the network provider. The DSS1
ISDN protocol is the main protocol used.
With leased line networking the nodes are connected via dedicated or leased lines.
One advantage of leased line networking are the fixed costs, regardless of the number
of call connections. The most common protocol used is QSIG/PSS1, which supports
several more features than the DSS1 protocol.
Virtual and leased-line networking can also be used in combination. Mitel systems are
well as third-party systems can be used.
20
Mitel 470 as of R4.1
syd-0585/1.2 – R4.1 – 08.2016