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CMTS to Cable Modem Network Topology
4
Release 11.3(4)NA
CMTS to Cable Modem Network Topology
Figure 1 shows the physical relationship between the devices in the HFC network and the cable
modem.
Figure 1 Sample Topology
IP-related
ATM, FDDI, 100BT...
100BT
Analog TV
Digital TV
Upconvertor
ISP @ home...
DS-RF 54-860 Mhz
Fiber
Transceiver
80 km
Fiber node
(Telephone pole,
underground box)
Distribution
amplifier
Top
amplifier
1000 ft
Drop box
Cisco u BR904
cable modem
100BT
100BT
100BT
Proxy server
ISP
WAN
Cisco
uBR7246
CMTS
MSD: Maintenance Service
Organization, Cable companies
13304