iPECS-MG
Hardware Description and Installation Manual Issue 1.1
31
5.2 Main Processing Board
The Main Processor Board controls communication between the peripheral boards, supervises
all resources in the system, controls the gain adjustment of the PCM signal, generates the
System tones, maintains System audio prompts and manages System call processing. The
MPB (Figure 5.2 1) is the main control for the System, and is composed of the microprocessor
and memory, the PCM management and miscellaneous functional circuits.
The MPB must be installed in the MPB slot, the upper left (1st) slot of the BKSU.
Figure 5.2-1 MPB
If an MPB is not installed, DC Power (+5V, +30V) will not feed to the backplane and other
boards or EKSUs.
The following devices and functions are included on the MPB:
Main Processor: MINDSPEED ARM9 Dual Core, M82805G, 375MHz
PCM Voice Processing circuit (ACT2) - PCM voice switching, System Tone/Gain
Control
Tone (DTMF/CPT) Detection/CID Signal (FSK/DTMF/RCID) Detection/CID
Generation
Real Time Clock for System Time/Date
System Memory [SDRAM/SRAM/Flash ROM/NAND Flash]
PLL Circuit for ISDN Line Clock Synchronization
1 Internal MOH - 13 Music resources
System Prompt storage, 3 languages
Basic 4 AA Function (default) or 4 VoIP channel
MODU (Option) Interface
Basic DSIU Included 6 DKTs and 6 SLTs
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