Controlling Yellow Alarms - Cisco 10000 Series Configuration Manual

Creating a T3, VT, or AUG Controller
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Controlling Yellow Alarms

Use the t1 yellow command to turn the detection or generation of a yellow alarm on or off.
t1 t1-number yellow
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no
Where:
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When you select SF framing for a full T1 interface (24 timeslots) that uses the default speed of 64,
consider using the no t1-number yellow detection command to turn off yellow alarm detection, because
the yellow alarm can be incorrectly detected with SF framing.
In the following example, T1 interface 1 is set to yellow detection:
Router(config)# controller t3 2/0/0.1
Router(config-controller)# t1 1 yellow detection
Setting the T1 Clock Source
You can set the internal or line (network) clock source for a T1 interface using the controller command.
t1 t1-number clock source {internal | line}
Where:
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The default is clock source internal.
In the following example, the interface is instructed to get its clock source from the line:
Router(config)# controller T3 1/0/0.1
Router(config-controller)# t1 1 clock source line
Configuring FDL
You can use the fdl ansi command to enable 1-second transmissions of ANSI T1.403 performance
reports through the facility data link (FDL), on both ends of the T1 connection.
t1 t1-number fdl ansi
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no
Where t1-number is T1 interface 1 to 28.
Use the no form of the command to disable this feature.
Cisco 10000 Series Router Line Card Configuaration Guide
6-30
Set ESF framing format for T1 interface 16:
Router(config)# controller T3 1/0/0.1
Router(config-controller)# t1 16 framing esf
{
detection
{
t1 t1-number yellow detection
t1-number is T1 interface 1 to 28
detection means that the interface is told that it is failing by the remote device, causing Cisco IOS
software to send a message to the console
generation means that the interface notifies the remote device if it is failing, causing Cisco IOS
software to send a message to the console
t1-number is T1 interface 1 to 28
internal specifies that the internal clock source is used
line specifies that the network clock source is used
t1 t1-number fdl ansi
Chapter 6 1-Port Channelized OC-12/STM-4 Line Card Configuration
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generation
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generation
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