# atm clock internal

#### Syntax

[ no ] atm clock internal [ internalSource ]

#### Release Information

Command introduced before JunosE Release 7.1.0.

#### Description

Causes the ATM interface to generate the transmit clock internally. The no version causes ATM interfaces to recover the clock from the received signal. If the internal clock is chosen and no internal source is specified, then the internal clock source is taken from the line module.

#### Options

- internalSource—One of the following:
  - module—Specifies that the internal clock is from the line module
  - chassis—Specifies that the internal clock is from the configured router clock

#### Mode

Interface Configuration