ber-test
This command specifies the Bit Error Rate test on the current T1 WAN interface.
Syntax
The syntax for this command includes several variations:
ber-test <channels group> <error rate> <pattern type> ber-test <channels group> <error rate> <pattern type> <timeout> ber-test <channels group> <error rate> <pattern type> forever
|
Command |
Description |
|---|---|
|
<channels group> |
Specifies the slot number within the range 1-24, on which the BER test runs. (See channel-group command for examples). |
|
<error rate> |
Specifies the rate of injected errors to the BER interface: 0 – no errors injected. 1 – inject errors in rate of 10-1. 2 – inject errors in rate of 10-2. 3 – inject errors in rate of 10-3. 4 – inject errors in rate of 10-4. 5 – inject errors in rate of 10-5. 6 – inject errors in rate of 10-6. 7 – inject errors in rate of 10-7. |
|
<pattern type> |
Specifies the pattern type: ‘1-2’ - select 01 Sequence as BER pattern ‘1-4’ - select 0001 Sequence as BER pattern ‘1-8’ - select 00000001 Sequence as BER pattern ‘3-24’ - select 3 '1's with 21 '0's Sequence as BER pattern ‘all-0’ - select all 0 Sequence as BER pattern ‘all-1’ - select all 1 Sequence as BER pattern ‘qrss’ - select Quasi-Random Signal Sequence as BER pattern |
|
<timeout> |
Specifies the time that the BER test will run for, in seconds. The default value is 180 seconds. For running the BER test with no time limitation, select the ‘forever’ value for this field. |
Default
By default, the BER test is not active.
Note
| ■ | This command is supported on the T1-WAN interface only. |
| ■ | The user needs to make a loopback at the FarEnd, to have synchronous BER test patterns. |
| ■ | Running the BER test with an error rate of 10-1 might cause the data not to synchronize. So the BER won`t count bits or errors. |
Command Mode
Privileged User
Example
This example starts the BER test for Channels 1-20 and Channel 22, with error rate of 10-3 and pattern type QRSS, which has no timeout:
(conf-if-t1 0/0)# ber-test 1-20, 22 3 qrss forever
This example starts the BER test for Channels 1,2 and 10-15, no errors injected, pattern type 3-24, and default timeout (180 seconds):
(conf-if-t1 0/0)# ber-test 1, 2, 10-15 0 3-24