Cisco Cisco IOS Software Release 12.0(21)S
Bit Error Rate Testing
Configuration Tasks
5
Cisco IOS Release: Multiple releases (see the Feature History table)
OL-15456-01
Performing a BER Test on a T1 Line
Terminating a BER Test on a T1 Line
Verifying a BER Test on a T1 Line
To verify that a BER test is running on a T1 line, enter the show controllers t3 slot/port:t1-line-number
command at any time during the test.
command at any time during the test.
Router# show controllers t3 6/0:1
T3 6/0 is up. Hardware is GSR 6 port CT3
T1 1 is up
timeslots: 1-24
FDL per AT&T 54016 spec.
No alarms detected.
Framing is ESF, Clock Source is Internal
BERT test result (running)
Test Pattern : 2^11, Status : Sync, Sync Detected : 1
Interval : 5 minute(s), Time Remain : 5 minute(s)
Bit Errors (since BERT started): 6 bits,
Bits Received (since BERT started): 8113 Kbits
Bit Errors (since last sync): 6 bits
Bits Received (since last sync): 8113 Kbits
Command
Purpose
Step 1
Router# configure terminal
Enters global configuration mode.
Step 2
Router(config)# controller T3 slot/port
Selects the interface.
Step 3
Router(config-controller)# t1 line-number loopback
local
Sets the specified T1 line into local loopback mode.
Step 4
Router(config-controller)# t1 line-number bert
pattern
pattern interval time
Sends a BERT pattern through the T1 line for the
specified time interval.
specified time interval.
Command
Purpose
Router(config-controller)# no t1 line-number bert
interval
time
Terminates the BER test running on the specified T1 line.