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B
ASIC SYSTEM
CHAPTER 3 EXPANSION STAGES AND SYSTEM CAPACITY
WA1...4 Slots for wiring adapters
DSP Slot for 3 stackable DSPX modules
Slot for 1 IP media module (not yet supported with Release 6.0)
CPU Slot for processor module (already fitted)
RAM RAM module (already fitted)
Flash Slot for Flash module (not supported)
Power supply
The system is powered as standard with 230 VAC or 115 VAC using the supplied power supply. The
communication server is powered with 19V DC from the power supply. All other voltages are generated
directly on the mainboard. To ensure that its operation is maintained even in the event of a mains outage,
an external uninterruptible power supply (UPS) must be used. For more details about the power supply
see Powering the communication server
.
Media resources
Media resources are used for complex signal processing functions, and made available by DSP chips.
(DSP stands for Digital Signal Processor). They provide functions for conference circuits, DTMF sender
and receiver, compression of voice data, etc. A DSP chip is fitted permanently to the mainboard.
Part of these media resources is allocated to fixed functions and can be used without licences (see Fixed
functions of the mainboard DSP). Another part is allocated to selectable functions, according to require-
ments. These functions are partly subject to licence (see Selectable functions of the mainboard DSP
).
The basic resources of the communication server can be expanded by fitting DSP modules . The func-
tions of the DSP chips on the modules can also be configured (see Max. number of channels per DSP
chip on SM-DSPX1 or SM-DSPX2 and Mitel 6900 SIP series SIP phones).
Fixed functions of the mainboard DSP
The table below provides an overview of the fixed functions of the mainboard DSP. No licences or addi-
tional hardware is required to use the functions.
Table 3.3:Fixed functions of the mainboard DSP (Sheet 1 of 2)
Max. number of simultaneous ... SMBC
Total circuits for three-party to six-party conference 10
Call waiting circuits 3
Intrusion and silent intrusion circuits 4
DTMF receiver for voice mail, auto attendant or analogue terminals 10
Dialling tone receiver 4
Busy tone receiver 4
Ring signal receiver 2
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