# t1 fdl

#### Syntax

t1 channel fdl { ansi | att | all | none }

no t1 channel fdl [ ansi | att | all ]

#### Release Information

Command introduced before JunosE Release 7.1.0.

#### Description

Specifies the FDL standard used by a specific T1 channel on the CT3 interface. The no version restores the default, none.

#### 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
- ansi—Specifies ANSI T1.403 Standard for extended superframe FDL exchange support
- att—Specifies AT&T Technical Reference 54016 for extended superframe FDL exchange support
- all—Specifies both the AT&T and ANSI mode for extended superframe FDL exchange support
- none—Removes the current FDL mode settings

#### Mode

Controller Configuration