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# path ds1|e1 bert

#### Syntax

path pathChannel { ds1 | e1 } tributaryIdentifier bert
pattern pattern interval time [ unframed ]

no path pathChannel { ds1 | e1 } tributaryIdentifier bert

#### Release Information

Command introduced before JUNOSe Release 7.1.0.

#### Description

Enables bit error rate tests using the specified pattern at the DS1/E1 over SONET/SDH VT layer on channelized SONET and SDH interfaces. The no version stops the test that is running.

#### Options

- pathChannel—Number, in the range 1–2147483648, that identifies the path
- tributaryIdentifier—Specifier for the tributary in the format
  pathChannel { ds1 | e1 } pathPayload/tributaryGroup/tributaryNumber
  - pathPayload—Payload number for the path; value is 1 for SONET and in the range 1–3 for SDH
  - tributaryGroup—Number, in the range 1–7, that identifies the group within the path
  - tributaryNumber—Number of the tributary within the tributary group; the value is in the range 1–4 if the tributary type is vt15 or tu11 and in the range 1–3 if the tributary type is tu12
- pattern—One of the following test patterns:
  - 2^11—Pseudorandom test pattern, 2,047 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

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