Nortel Communication Server 100 Manual page 32

32 Carrier Remote IPE product description
Figure 7 "Remote Carrier Interface card functional block diagram" (page
32) shows the Remote Carrier Interface card block diagram illustrating
major functional blocks. Functions of these blocks are described in the
following sections.
Figure 7
Remote Carrier Interface card functional block diagram
Micro Processing Unit
The Micro Processing Unit (MPU) coordinates and controls data transfer
and addressing of the peripheral devices and communicates with the
Local Carrier Interface card using serial communication channels over the
carrier timeslot 2. Tasks that the MPU performs depend on the interrupts
it receives. These interrupts are prioritized by the importance of the tasks
they control.
The MPU is highly integrated and provides most of the decision making
logic on the chip. Functions of the MPU include controllers, timers, control
logic, address decoding, dual-port RAM and independent direct memory
access, parallel input/output ports, and independent full-duplex serial
communication channels that support various protocols.
The MPU can be reset by:
•
powering up the Remote Carrier Interface card
•
the watchdog timer
Nortel Communication Server 1000
Carrier Remote IPE Fundamentals
NN43021-555 04.01 4 June 2010
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