Expansion Stages and System Capacity
46
Aastra 470 as of R3.2
syd-0337/1.6 – R3.2 – 09.2014
DSP function which can be selected on the call manager card
A DSP chip on the call manager card provides selectable functions. A description of
the individual functions can be found as of page 47.
The functions are determined in the DSP configuration ( =ym). In Tab. 21 all the
possible combinations are listed, with the maximum number of voice channels. For
this the DSP chip on the Call Manager card has to be loaded with different firm-
ware. Additional functions require the use of one or more DSP modules. Some of
these functions are subject to a licence.
3. 3 Expansion with cards and modules
An Aastra 470 basic system can be individually expanded using interface cards, sys-
tem modules and an application card. The number and position of the available
slots are described in the chapter "Interfaces, display and control elements",
page 40.
3. 3. 1 System modules
With system modules a distinction is made between modules expandable as an op-
tion (DSP modules, IP media modules, Call charge modules) and mandatory mod-
ules (RAM module). This chapter describes only the system modules that can be ex-
panded as an option. They expand the resources of the communications server,
which means the system can be expanded step by step in line with requirements.
3. 3. 1. 1 DSP modules
Processor-intensive system functions require DSP resources. The communication
server’s DSP capacity increases through the use of DSP modules.
Fig. 12 Design of the DSP module
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