Alcatel-Lucent 7342 - Figure 6-5 Modular ONT Functional Blocks; Local Switching; Table 6-13 Optical Functions

6 — LP MDU, MDU, and modular ONT hardware functional blocks
6-14 July 2008 Alcatel-Lucent 7342 ISAM FTTU ONT R04.05.06
ONT Product Information Manual Edition 01 3FE 51892 AAAA TCZZA
Figure 6-5 Modular ONT functional blocks
Local switching
The modular ONT provides local switching functions through the PON
motherboard. The PON motherboard supports the GPON optical conversion and
6-port GE multilayer switching.
Table 6-13 provides a description of the optical functions required by the modular
ONT motherboard.
Table 6-13 Optical functions
Table 6-14 describes the industry standards supported by the modular ONT GPON
MAC FPGA that provides media access control functions.
POTS/VDSL Combo
4xVDSL 8XPOTS
POTS/VDSL Combo
4xVDSL 8XPOTS
RS232 craft port
interface (optional)
Signal
flow
PCI
bus
SPI
Control bus
GMII
GPON
Control
bus
NTR
SU FPGA configuration
Optical
diplexer
GPON
MAC FPGA
ACU On-board
controller
(OBC)
Service
unit
connector
1812
4
PON mother board
1 T/
R
8 T/
R
POTS/VDSL Combo
4xVDSL 8XPOTS
1 T/
R
8 T/
R
1 T/
R
8 T/
R
1xGe Serdes
Legend:
12-port
GigE
multilayer
switch
Optical function Description
Optical diplexer Optical-to-electrical conversion
Clock data recovery (CDR) Data quantization, signal-level detection, clock recovery, and
data retiming
Burst mode laser driver (BMLD) Conversion of the digital stream bursts of data from the GPON
MAC field programmable gate array (FPGA) into the
appropriate current levels for driving the laser diode