Nortel 1000 Manual page 31

Memory
The Fiber Peripheral Controller memory stores programs and data for the
following functions in the following locations:
•
Boot code and self-test code are stored in the EPROM.
•
Data is stored in the RAM.
•
The main MPU function code is stored in the Fiber Peripheral
Controller card FLASH memory.
•
Data containing the Fiber Peripheral Controller card identification and
version is stored in the EEPROM.
Card-LAN interface
To implement the Card-LAN interface, the Fiber Peripheral Controller
card uses a dual Universal Asynchronous Receiver-Transmitter (UART)
device. One UART channel provides a serial communication interface to
IPE cards.
The Card-LAN is a 19.2 kbps asynchronous interface. It is used to poll
and communicate with IPE cards through the Fiber Peripheral Controller to
transmit maintenance messages, which include:
•
LED control of the IPE card enable/disable
•
peripheral card configuration
•
peripheral card type and version information
IPE interface
The IPE interface links IPE cards to the Fiber Peripheral Controller MPU
using sixteen DS-30X loops, one for each IPE card. It contains the
following Fiber Peripheral Controller circuits:
•
Dual formatter that transforms serial peripheral loop information into
parallel Integrated Voice and Data (IVD) bus information and parallel
IVD bus information to serial peripheral loop information.
•
Message handler that performs channel-associated signaling to and
from the IPE cards. It receives signaling information from the IPE
cards; then the MPU accesses this information, interprets it, and sends
it to the Fiber Superloop Network in the appropriate format. From the
Fiber Superloop Network, the signaling messages are received and
interpreted by the Fiber Peripheral Controller MPU and sent to the
serial peripheral loops in the appropriate format.
•
Timeslot interchange that provides the correspondence between
the 120 voice and data timeslots on the fiber-optic link and the 640
Nortel Communication Server 1000
Fiber Remote IPE Fundamentals
NN43021-554 04.01 4 June 2010
Copyright © 2007-2010 Nortel Networks. All Rights Reserved.
Functional description 31