# show controllers t1

#### Syntax

show controllers t1 [ brief | { { fractional | serial } [ interfaceSpecifier ] |
interfaceSpecifier [ brief | all | summary ] } ] [ filter ]

#### Release Information

Command introduced before JunosE Release 7.1.0.

#### Description

Displays information about the T1 controller interfaces.

#### Options

- fractional—Displays information about T1 fractional interfaces
- serial—Displays information about T1 serial interfaces
- interfaceSpecifier—Particular interface; format varies according to interface type; see Interface Types and Specifiers
- brief —Abbreviated display of T1 controller information
- all—Shows statistics for all time intervals, rather than statistics for selected time intervals
- summary—Displays link status summary
- filter—See Filtering show Commands

#### Mode

Privileged Exec, User Exec