# t1 bert

#### Syntax

t1 channel bert pattern pattern interval time [ unframed ]

no t1 channel bert

#### Release Information

Command introduced before JunosE Release 7.1.0.

#### Description

Enables bit error rate tests using the specified pattern on a T1 line on a CT3 module. The no version stops the test that is running.

#### Options

- channel—One or more individual T1 channels, ranges of T1 channels, or combination of individual channels and ranges, in the range 1–28 (no spaces); for example, 3,7-15,19-13,27
- pattern—One of the following test patterns
  - 0s—Repetitive test pattern of all zeros, 00000...
  - 1s—Repetitive test pattern of all ones, 11111...
  - 2^11—Pseudorandom test pattern, 2047 bits in length
  - 2^15—Pseudorandom test pattern, 32767 bits in length
  - 2^20-O153—Pseudorandom test pattern, 1048575 bits in length
  - 2^20-QRSS—Pseudorandom QRSS test pattern, 1048575 bits in length
  - 2^23—Pseudorandom test pattern, 8388607 bits in length
  - alt-0-1—Repetitive alternating test pattern of zeros and ones, 01010101...
- time—Duration of the test in the range 1–1440 minutes
- unframed—Specifies that the test bit pattern occupies all bits on the link, overwriting the framing bits. If you do not specify the unframed keyword, then the test bit pattern occupies only T1 payload bits.

#### Mode

Controller Configuration