Setting The Framing Format - Cisco 10000 Series Configuration Manual

Channelized T1 Commands

Setting the Framing Format

You can specify the T1 interface framing format using the following command:
t1 t1-number framing
[no] t1 t1-number framing
Where:
•
•
•
The default framing format is extended super frame (ESF).
Use the no form of the command to return framing to its default value.
Examples:
•
•
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
[ ]
no
Where:
•
•
•
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 1/0/0
Router(config-controller)# t1 1 yellow detection
Cisco 10000 Series Router Line Card Configuaration Guide
8-16
{ |
esf
{
t1-number is T1 interface number 1 to 28.
framing is either extended super frame (ESF) or super frame (SF). You can set SF hdlc-idle to 0x7E
or 0xFF.
hdlc-idle options allow you to set the idle pattern for the T1 interface to either 0x7e (the default) or
0xff.
Set SF framing format for T1 interface 6.
Router(config)# controller T3 1/0/0
Router(config-controller)# t1 6 framing sf
Set ESF framing format for T1 interface 16.
Router(config)# controller T3 1/0/0
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 it is failing by the remote device, causing IOS to send a
message to the console
generation means that the interface notifies the remote device if it is failing, causing IOS to send a
message to the console
Chapter 8
[ { |
sf hdlc-idle 0x7E 0xFF
| [ {
esf sf hdlc-idle 0x7E
| }
generation
| }
generation
6-Port Channelized T3 Line Card Configuration
}]}
| }]}
0xFF
OL-8834-04