Table of Contents
Advertisement
The µPD98413 is a quad STS-12/STM-4 framer device. The major functions are to map the ATM cells/POS (PPP
over SONET) packets received from the ATM/POS device into the SONET/SDH frame and output the ATM cells/POS
packets to the line, or to receive the ATM cells/packets from a receive SONET/SDH frame and output the ATM cells/
packets to the ATM/POS device. The mode of the µPD98413 is set, commands are issued to the µPD98413, and its
status registers are polled via the management interface.
Port 0
Transceiver
Fiber Transceiver
&
UTP Transceiver
Receiver
Port 1
Transceiver
&
Receiver
Port 2
Transceiver
&
Receiver
Port 3
Transceiver
&
Receiver
622.08 STS-12c/STM4 frame
Tx
Overhead
Cell
Rx
CHAPTER 3 FUNCTIONAL OUTLINE
Figure 3-1. µ µ µ µ PD98413 and Peripheral Blocks
OSC
77.76 or
19.44 MHz
µPD98413
Line interface
NEASCOT-P65
Alarm
Line interface card
Figure 3-2. Transmit/Receive Data Flow of µ µ µ µ PD98413
Cell
PRELIMINARY
UTOPIA/POS
interface
Management interface
µPD98413
Port 0 framer
Port 1 framer
Port 2 framer
Port 3 framer
ATM/POS
switch
element
Management
element
Switch control module
ATM cell / Packet
NEC confidential and Proprietary
37
Advertisement
Table of Contents
