# path ds3 t1 bert

#### Syntax

path pathChannel ds3 ds3Channel t1 t1Channel bert
pattern pattern interval time [ unframed ]

no path pathChannel ds3 ds3Channel t1 t1Channel bert

#### Release Information

Command introduced before JunosE Release 7.1.0.

#### Description

Enables bit error rate tests using the specified pattern for a T1 channel on a DS3 signal. This command applies to a T1 channel on a DS3 over channelized SONET interface. The no version stops the test that is running.

#### Options

- pathChannel—Number, in the range 1–2147483648, that identifies the path
- ds3Channel—Number, in the range 1–3, that identifies the DS3 channel
- t1Channel—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:
  - 2^11—Pseudorandom test pattern, 2047 bits long
  - 2^15—Pseudorandom test pattern, 32,767 bits long
  - 2^20-O153—Pseudorandom test pattern, 1,048,575 bits long
- time—Duration of the test in the range 1–1440 minutes
- unframed—Test bit pattern occupies all bits on the link, overwriting the framing bits. If you do not specify this keyword, the test bit pattern occupies only T1/E1 payload bits.

#### Mode

Controller Configuration