# HardwareEcho.XLaw

Determines the echo hardware companding mode.

#### Syntax

HardwareEcho.XLaw = mode

#### Access

Read/Write

#### Type

String

#### Default

A_LAW

#### Allowed values

A_LAW | MU_LAW

#### Example

HardwareEcho.XLaw = MU_LAW

#### Details

The hardware companding mode must match the DSP operating system (DSPOS) service library used. Therefore, A_LAW must use cg6kliba.r41, and MU_LAW must use cg6klibu.r41.

For more information, refer to Configuring hardware echo cancellation.

Note: This keyword is not applicable when you use software echo cancellation on the board.

#### See also

HardwareEcho.EchoChipEnabled, HardwareEcho.Trunk[x].OnOffTimeslots