Juniper G10 CMTS, Hardware Manual

Page: 48 / 210

DOCSIS Module
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
JUNOSg 3.0 G10 CMTS Hardware Guide 32
Figure 13: DOCSIS Module Block Diagram
Data Packet Processing
This section describes the major processing functions performed at the PHY, MAC, and
higher protocol layers for DOCSIS 1.1 and EuroDOCSIS 1.1 compliance. Figure 14 on page 33
illustrates these functions. See the DOCSIS specifications for more details.
Modem
Broadband Cable Processor
ASIC
Dual PCI Bridge
Memory Controller
SDRAM
Bridge
cCPI Midplane
Flash
Memory
Timer &
NVRAM
100Base-T
Traffic
Port
100Base-T
100Base-T
Traffic
Port
Mgmt
Port
Security
Proc.
Upconverter
Packet, Scheduling, and Management
Processing Devices
I
2
C