Expansion Stages and System Capacity
51
Aastra 470 ab R3.0
syd-0337/1.5 – R3.0 – 05.2013
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 43.
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 module
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
DSP modules are stacked on the call manager card and do not take up any slots for
interface cards (see "Fitting DSP modules", page 110). The different types of mod-
ules can be used as a mix.
Tab. 15 DSP modules
Type Number of DSP chips per module Max. number of modules per system
SM-DSPX1 1
2
SM-DSPX2 2
SM-DSP1
1)
1)
Although no longer available, the module is still supported.
1
SM-DSP2
1)
2
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