Mitel Aastra 470 System Manual page 72

Expansion Stages and System Capacity
Aastra Intelligent Net
In an AIN with an Aastra 470 as Master and more than 36 users, an
Aastra 470 Expansion licence is required only for the Master. The Aastra
470 satellites do not need a licence, even if they have more than 36
users (except of course for offline operations lasting more than 36
hours).
• VoIP Channels for Standard Media Switch
This licence enables the conversion of voice channels for VoIP-non-VoIP connec-
tions and is used for IP terminals, SIP terminals, SIP access channels or to operate
an Aastra Intelligent Net. High voice data compression is possible with the G.729
VoIP channels. An additional voice channel is activated with each licence.
Notes:
– If VoIP mode is set to G.711, two G.711 VoIP channels per system can
be used without a licence (see also
of operation", page
– Theoretically there are no VoIP channel licences in a pure VoIP envi-
ronment (only IP/SIP phones on the system and connection to the
public network via an SIP provider). However, as soon as voice mail
functions, the announcement service or music on hold is used, VoIP
channel licences are required as the use of these functions entails a
conversion of the voice data.
Aastra Intelligent Net
In an AIN the licence can also be used for the connections between the
nodes. Two VoIP channel licences are required for each node connec-
tion. The licences are always acquired for the Master. The number of
licences determines the maximum number of simultaneously active
conversions, regardless of the nodes on which they are currently being
used. Requirement: The DSP resources on each node must be available
and allocated accordingly.
• G.729 Codec
This licence allows the use of a G.729 codec for the voice channel of Aastra SIP
phones, IP system phones and SIP network interfaces (also for SIP networking).
The licences are always used wherever they are required. Aastra SIP-DECT® and
standard SIP terminals do not require this licence. Likewise, calls to the emer-
gency number do not require a licence.
Note
If several emergency destinations are defined in a system, the follow-
ing points need to be considered:
72
"Standard Media Switch modes
51).
Aastra 470 as of R3.2
syd-0337/1.6 – R3.2 – 09.2014