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# path ds3 bert

#### Syntax

path pathChannel ds3 ds3Channel bert pattern pattern interval time

no path pathChannel ds3 ds3Channel bert

#### Release Information

Command introduced before JUNOSe Release 7.1.0.

#### Description

Enables bit error rate tests using the specified pattern for a DS3 signal. This command applies to 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
- pattern—One of the following test patterns:
  - 0s—Repetitive test pattern of all zeros, 00000...
  - 1s—Repetitive test pattern of all ones, 11111...
  - 2^9—Pseudorandom test pattern, 511 bits long
  - 2^11—Pseudorandom test pattern, 2047 bits long
  - 2^15—Pseudorandom test pattern, 32,767 bits long
  - 2^20—Pseudorandom test pattern, 1,048,575 bits long
  - 2^20-QRSS—Pseudorandom QRSS test pattern, 1,048,575 bits long
  - 2^23—Pseudorandom test pattern, 8,388,607 bits long
  - alt-0-1—Repetitive alternating test pattern of zeros and ones, 01010101...
- time—Duration of the test, in the range 1–1440 minutes

#### Mode

Controller Configuration

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