System Overview
20
Aastra 415/430 as of R3.2
syd-0344/1.6 – R3.2 – 09.2014
SIP networking
Networking based on the open global SIP protocol is the universal way of connect-
ing several systems with one another via the private data network or the internet.
Aastra 400 communication platforms can be used to network up to 100 other
Aastra systems or SIP-compatible third-party systems. All the main telephony fea-
tures such as call number and name display, enquiry call, hold, brokering, call trans-
fer and conference 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 interfaces (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 lo-
cations 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 avail-
able 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 num-
ber of call connections. The most common protocol used is QSIG/PSS1, which sup-
ports several more features than the DSS1 protocol.
Virtual and leased-line networking can also be used in combination. Aastra systems
are well as third-party systems can be used.