Expansion Stages and System Capacity
52
Mitel SMB Controller
syd-0657/2.0 – R6.0 – 09.2018
data must be transformed on connections between DECT and non-DECT end-
points. This process requires DSP capacity.
Purely DECT-DECT connections set up already do not require any media re-
sources. On the other hand, media resources are required to set up connections.
DECT channels can be used without a licence.
•
VoIP
Connections between IP and non-IP endpoints are made via an IP media gateway.
This is carry out by the integrated standard media switch that switches VoIP chan-
nels for call connections in the IP network. The Standard Media Switch uses media
resources for the real-time processing of the call data. VoIP channels are always re-
quired between IP and non-IP endpoints, e.g. for internal connections between an
SIP/IP phone and a digital system phone or e.g. for an external user who is routed
to the internal Voice Mail System via an SIP network interface. In an AIN VoIP chan-
nels are also used for call connections between the nodes (see "Use of VoIP chan-
nels", page 53 for an overview).
The number of configurable VoIP channels depends on both the type of DSP chip
(see "Configuration of DSP chips", page 56) and the configured mode (see "Stand-
ard Media Switch modes of operation", page 55).
If the VoIP mode is set to G.711, two G.711 VoIP channels per system can be used
without a licence. One
VoIP Channels for Standard Media Switch
licence is required
for each additional VoIP channel.
•
FoIP
For reliable real-time fax transmissions via an IP network using the T.38 fax protocol
(ITU-T). FoIP channels can be used without a licence.
•
Audio services
The audio channels are used to play back and record audio data. Additionally, each
audio channel is assigned a DTMF receiver for enabling user inputs during play-
back. Licences (
Enterprise Voice Mail
,
Audio Record & Play Channels
,
Auto Atten-
dant
) and media resources are required for this.
Audio channels can be used for voice mail, auto attendant, queue with announce-
ment, call recording, announcement with audio file, or conference bridge. The allo-
cation is configurable (see "Reserving audio channels", page 55). Announcement
service and music on hold use their own resources.
Note
On the Mitel SMBC communication server G.711 audio channels are always used for audio
services. The
Voice mail mode
parameter can therefore not be changed for this system.
•
GSM
Enhanced functionality is achieved for integrated mobile/external phones by provid-
ing special DTMF receivers during the call connection. Suffix dialling functions (such
as enquiry calls or setting up a conference with function codes ) can be carried out
as a result. The number of GSM channels – and therefore the number of DTMF re-
