Cisco Systems 870 Router User Manual


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Cisco Serial Connectivity
Network Modules








One-port Clear Channel
T3/E3 Network Module
Provides serial
connectivity to a T3 44736
Mbps or E3 34368 Mbps
line with integrated line
interface unit (LIU) DSU
The T3/E3 port consists
of a pair of 75 ohm BNC
connectors

Serial Connectivity
3800 Series–123(11)T
2811, 2821, and 2851–
123(8)T4
No reliance on other
network modules, WICs,
voice interface cards,
or advanced integration
modules

One-port HSSI Network
Module
Provides serial speeds up
to 52 Mbps via a 50-pin
SCSI Type II connector
This network module
requires an external T3/E3
DSU/CSU

Serial and Legacy
Concentration
3800 Series–123(11)T
2811, 2821, and 2851–
123(8)T4
No reliance on other
network modules, WICs,
voice interface cards,
or advanced integration
modules







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