ATA 186 H323 Audio parameters

Posted: May 26, 2006 by sankar in Analog, ATA186

LBRCodec:

If LBRCodec is set to 0, ATA chooses g723.1 as the Low bit rate codec. (You can have up to 2 calls on the ATA at g723.1)

If LBRCodec is set to 3, ATA chooses g729 as the Low bir rate codec (Only one call can be there on the ATA at g729). The allocation of g729 to either ports is dynamic. (Unlike SCCP, where the Connect mode bit 21 determines which port will use g729)

Audiomode 

Audiomode has 32 bits. First 16 bits set parameters for Phone port 1, Upper 16 bits set parameters for Phone port 2.

Default : 0x00150015

0000 0000 0001 0101 0000 0000 0001 0101

Bit 0 and 16 – Disable VAD (0 – Disable, 1 – Enable)

Bit 1 and 17 – if set to 1, enable g711 only. If set to 0 Enable LBR along with g711.

Bit 2 and 18 – if set to 1 enables fax CED tone detection

TxCodec:

To specify transmit audio codec preference

0 – g723 (only if LBRCodec is 0)

1 – g711alaw

2 – g711ulaw

3 – g729a (only if LBRCodec is 3)

RxCodec

0 – g723 (only if LBRCodec is 0)

1 – g711alaw

2 – g711ulaw

3 – g729a (only if LBRCodec is 3)

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