NCC.X.ADI_START.echocancel

The following table describes NCC.X.ADI_START.echocancel parameters:

NCC.X.ADI_START.echocancel

Dependent functions: nccStartProtocol

Field

Type

Default

Units

Description

adapttime

DWORD

0

ms

Echo canceller adaptation time for MODE=2. The valid AG and CG range is 100 to 1000. Smaller values require more DSP processing power.

filterlength

DWORD

0

ms

Filter length of echo canceller for MODE=2. Valid range is 2 to 20. Greater values require more DSP processing power.

gain

INT32

0

dB

Amount of amplification applied to echo cancelled output. Valid range is -54 to 24.

mode

DWORD

0

integer

Controls echo canceller operation:

A value can be formed by using the OR operator with any of the following bit masks or by using one of the specified constants:

NCC_ECHOCANCEL_DEFAULT (1): Choose the default length and adapt time based on board type. (For AG 4000/C and AG 4040/C boards, the default is for no echo cancel.) For more information, see the Dialogic® NaturalAccess™ Alliance Device Interface API Developer's Manual.

NCC_ECHOCANCEL_CUSTOM (2): Use specified length and adapt time.

Default = 0: No echo cancellation.

predelay

DWORD

0

ms

Output sample delay. Valid range is 0 to 9.