Cisco 10000 Series Configuration Manual page 208

Creating a T3, VT, or AUG Controller
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Specifying the Idle Pattern
You can set a specific pattern to be transmitted between HDLC packets on all unconfigured timeslot
interfaces that belong to a channelized T3 interface. To do so, use the idle pattern command.
idle pattern patterns
[no] idle pattern patterns
Where patterns is a number in the range of 0x0 to 0xff (hexadecimal) or 0 to 255 (decimal). You can
enter this value in either hexadecimal or decimal form. Values of 0 to 254 set the idle pattern to HDLC
flags (0x7e); a value of 255 sets the pattern to 0xff (all ones).
Note Some systems interpret marks, 0xff, as an abort signal. Therefore, flags, 0x7e, is preferred.
The default idle pattern is 0x7e.
Use the no form of the command to return the idle pattern to its default value.
Examples:
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Setting the T3 Clock Source
At the prompt, set the internal or line clock source for the selected T3 controller using the clock source
command. This command is set in controller configuration mode.
clock source {internal | line}
Where:
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The default is clock source internal.
Cisco 10000 Series Router Line Card Configuaration Guide
7-24
Enter the unit identification code.
Router(config-controller)# mdl string unit abc
Enter the facility identification code.
Router(config-controller)# mdl string pfi string
Enter the port number to send in the MDL idle signal message.
Router(config-controller)# mdl string port string
Enter the generator number to send in the MDL test signal message.
Router(config-controller)# mdl string generator string
Set a hexadecimal idle pattern.
Router(config)# controller T3 1/0/0.1
Router(config-controller)# idle pattern 0x10
Set a decimal idle pattern.
Router(config)# controller T3 1/0/0.1
Router(config-controller)# idle pattern 23
internal specifies that the internal clock source is used
line specifies that the network clock source is used
Chapter 7 4-Port Channelized OC-3/STM-1 Line Card Configuration
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