Grandstream GXW42xx User Manual User Manual

Page 50

FIRMWARE 1.0.5.8

GXW42XX USER MANUAL

PAGE 48 OF 62

Jitter Buffer Type

Select either Fixed or Adaptive based on network conditions.

Jitter Buffer

Length

Select Low, Medium or High based on network conditions.



High (initial 200ms, min 40ms, max 600ms) Note: not all vocoders can meet the high

requirement



Medium (initial 100ms, min 20ms, max 200ms)



Low (initial 50ms, min 10ms, max 100ms)

SLIC Setting

Depends on standard phone type (and location)

Caller ID Scheme

Select the value according to the local Telco standard where the GXW42XX is installed.

Please refer to the pull down list to select.

Polarity Reversal

Default is No

. If set to “Yes”, polarity will be reversed upon call establishment and termination.

Loop Current

Disconnect

Set to Yes if the traditional PBX you are using with GXW42XX uses this method for signaling

call termination. Default is No.

Loop Current

Disconnect

duration

Default is 200.In 100 - 10000 milliseconds range.

Enable Hook

Flash

If no, flash will be treated as an on hook event.

Hook Flash

timing(Minimum)/

(Maximum)

Sets the minimum/maximum time the phone is on hook before being detected as a hook flash.

The range is 40 to 2000 milliseconds

On Hook Timing

Sets the time required to detect that the phone is on hook. The range is 40 to 2000

milliseconds. Default is 400 milliseconds.

Gain

Handset volume adjustment. RX is for receiving volume (direction FXSto analog phone), TX

is for transmission volume (Analog phone to FXS). Default values are 0dB for both

parameters. Loudest volume: +6dB Lowest volume: -6dB.

Disable Line Echo

Canceller (LEC)