Specifying T1 Short-Haul Cable Length - Cisco 10000 Series Configuration Manual

Controller Configuration Commands
The no bert command terminates a running BERT and, whether running or stopped, inhibits the display
Note
of BERT information on the console when you invoke the show controllers command (see the
"Displaying Controller Information" section on page
Example:
To send a BERT pseudorandom pattern of 2^20-O.153 through E1 interface 1/0/0 for 5 minutes:
Router(config)# controller e1 1/0/0
Router(config-controller)#bert pattern 2^20-O153 interval 5 unframed
Router(config-controller)#
For more information, see the
the
Running a T1 BERT
In addition to the local and network loopback configurations described in the
section on page
You can only perform remote loopback testing on T1 ports that also have C-bit parity framing
Note
configured.
To send a BERT pattern on a line card T1 interface configured for remote loopback, use the following
controller configuration command syntax:
[no] bert pattern pattern interval time
Use the following command to send a BERT pattern to the far-end device:
Example:
To send a BERT pseudorandom pattern of 2^20-O.153 through T1 interface 1/0/0 to the far-end device
for 5 minutes:
Router(config)# controller t1 1/0/0
Router(config-controller)# bert pattern 2^20-O153 interval 5
Router(config-controller)#

Specifying T1 Short-Haul Cable Length

You can only use the cablelength command on T1 ports. Use this command to compensate short haul
lines (under 660 feet) for signal losses associated with line length. To specify cable length for short-haul
cables use the following controller configuration command syntax:
[no] cablelength short {110 | 220 | 330 | 440 | 550 | 660}
Use
Table 5-6
Line Length (feet)
0 to 110
110 to 220
220 to 330
Cisco 10000 Series Router Line Card Configuaration Guide
5-20
Cisco 10000 Series Internet Router Troubleshooting
5-19, you can also perform remote loopback testing on T1 interfaces.
Table 5-6 to specify the proper short-haul cable length value for cables up to 660 feet long.
T1 Short-Haul Line Buildout
Cable Length Value
110
220
330
Chapter 5
5-13).
Cisco IOS Interface and Hardware Component Configuration Guide
24-Port Channelized E1/T1 Line Card Configuration
Guide.
"Running a BER Test"
and
OL-8834-04