Dsp Resources - Mitel Aastra 470 System Manual

3. 2. 4

DSP Resources

DSP resources are used for complex signal processing functions. (DSP stands for Digi-
tal Signal Processor). They provide functions for conference circuits, DTMF sender and
receiver, compression of voice data, etc. Two DSP chips are permanently fitted to the
call manager card.
A DSP chip on the call manager card is allocated to fixed functions, which can be used
without licences (see
The functions of the second DSP chip can be selected to suit requirements. The func-
tions are partly subject to licence (see
The basic resources of the communications server can be expanded by fitting DSP
modules (see "DSP modules", page
page 54). The functions of the DSP chips on the DSP modules can also be configured.
System modules on the call manager card
The table below provides an overview of fixed DSP functions on the call manager card.
Except for the Enterprise voice mail channels no licences or additional hardware are
required to be able to use the functions.
Tab. 16 System modules on the call manager card
Max. number of simultaneous ...
Total circuits for the functions
2)
silent intrusion.
Circuits for the Call Waiting function
DTMF sender
DTMF receiver for voice mail or auto attendant
DTMF receiver for analogue terminals
Dialling tone receiver
Busy tone receiver
Ring receiver
3)
FSK receiver for CLIP detection on analogue network interfaces
CAStransmitter/receiver for PRI network interfaces
Total audio channels for basic voice mail
Total audio channels for Enterprise voice mail
1)
The functions can all be of the same type or used as a mix.
2)
Licence required
3)
One FSK transmitter available per FXS interface for CLIP display on analogue terminals. No DSP resources re-
quired.
4)
Of relevance only to certain countries such as Brazil
5)
Can be used without licence subject to the following restrictions: Voice memory capacity approx. 20 min-
utes, no e-mail notification in the event of new voice messages, no forwarding of voice messages, no call re-
cording, restricted voice mail menu by remote retrieval.
Aastra 470 as of R3.2
syd-0337/1.6 – R3.2 – 09.2014
Tab. 16).
Tab.
46) and IP media modules (see
1)
three-party conference, six-party conference, intrusion and
4)
5)
or auto attendant
2)
, auto attendant
Expansion Stages and System Capacity
21).
2)
2) 2)
or call recording
"IP media module",
Number of
entries
10
6
9
8
8
2
5
2
4
30
2
8
45