3-35
Software Configuration Guide for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
OL-1957-04
Chapter3 Configuring with the Command-Line Interface
Configuring the NM-AIC-64, Contact Closure Network Module
Figure3-2 TL1 and SNMP Message Flow in a DCN Application
Serial Communication Channels
As illustrated in Figure3-3, the AIC has two serial communications channels that provide different types
of interfaces to Cisco IOS software:
• Serial data channel
• Asynchronous craft port
Figure3-3 OS Boundary into the AIC
Serial Data Channel
The serial data channel supports all TCP/IP traffic to and from the AIC. This includes communication
over IP with NOCs and data centers. The channel consists of one physical interface that provides support
for the following applications:
• Telnet
• TL1
• TFTP
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