Specifications

4-16 Cisco Multiport Router Installation and Configuration Guide
Configuring the Router
Step 2 Enter the config terminal command at the enable prompt to enter configuration
mode:
Router# config terminal
You can now make changes to the configuration. Press Ctrl-Z to exit configuration
mode.
Step 3 Enter the half-duplex command to reset the port from constant carrier mode to
controlled carrier mode:
interface serial 2
half-duplex controlled carrier
Step 4 Enter the no half-duplex command to return to constant carrier mode:
interface serial 2
no half-duplex controlled carrier
Step 5 Enter the half-duplex timer command to specify the time that the interface delays
when in controlled carrier mode. For example, to configure the DCD drop delay,
enter the following commands, using appropriate values for your system:
interface serial 2
half-duplex timer dcd-drop-delay 100 ms
The amount of time is specified in milliseconds.
Step 6 Enter the timer command to tailor the delay times for the router ports. Table 4-2
lists the timer commands and their default settings.
Table 4-2 Half-Duplex Timer Commands
Timer Syntax
Default Setting
(Milliseconds)
CTS delay half-duplex timer cts-delay 100
CTS drop timeout half-duplex timer cts-drop-timeout 5000
DCD drop delay half-duplex timer dcd-drop-delay 100
DCD transmission start delay half-duplex timer
dcd-txstart-delay
100
RTS drop delay half-duplex timer rts-drop-delay 100