User manual

AT820

AT820 Series

Series

Series User

User

User Manual

Manual

ATCOM TECHNOLOGY CO., LIMITED www.atcom.cn

it.

5 .5.3.4

.5.3.4

.5.3.4 Others

Others

Send

Key: Specify the Key to send the number after pressing it, “ # ” and “ * ” are optional.

5 .5.4

.5.4

.5.4 Voice

Voice

5 .5.4.1

.5.4.1

.5.4.1 Echo

Echo

Echo Cancellation

Cancellation

A. VAD:Whether to enable VAD ( Voice Active Detection ) or not. G729 Payload length

can not be set over 20ms while enable it.

B. CNG: Whether to enable CNG ( Comfort Noise Generator ) or not. If mute the phone

and set VAD as “ Yes

”

, the phone will send comfort noise to remind the other one

that the call is remain in force.

5 .5.4.2

.5.4.2

.5.4.2 Jitter

Jitter

Jitter Buffer

Buffer

A. Type: Specify type for jitter buffer: Adaptive or Fixed. The SPA can buffer incoming

voice packets to minimize out-of-order packet arrival. This process is known as

jitter buffer .

B. Min Delay: The minimum delay of the jitter buffer . Ranges from 0 to 997. The

default value is 0.

C. Max Delay: The maximum delay of the jitter buffer . Ranges from 2 to 999. The

default value is 300.

D. Normal Delay: It is used as fixed delay which should be between min delay and

max delay. Ranges from 1 to 998. The default value is 120.