Grandstream Networks GXW40XX User Manual download pdf (Page 34)

Grandstream Networks, Inc. GXW40XX User Manual Page 34 of 38

Firmware 1.0.4.2 Last Updated: 06/2011

iLBC Payload type

Default value is

Defines payload type for iLBC. The valid range is between 96 and

127.

AAL2-G726-16

Payload type

Default value is 100. Range is from 96 to 127.

AAL2-G726-24

Payload type

Default value is 99. Range is from 96 to 127.

AAL2-G726-32

Payload type

Default value is 104. Range is from 96 to 127.

AAL2-G726-40

Payload type

Default value is 103. Range is from 96 to 127.

G729E payload type

Default value is 102. Range is from 96 to 127.

VAD

Default is

. VAD allows dete

cting the absence of audio and conserve bandwidth by

preventing the transmission of "silent packets" over the network.

Symmetric RTP

Default is No. When set to Yes the device will change the destination to send RTP

packets to the source IP address and por

t of the inbound RTP packet last received by

the device.

Fax Mode

T.38 (Auto Detect) FoIP by default, or Pass-Through (must use codec PCMU/PCMA)

Fax Tone Detection

Mode

Default is Callee.

This decides whether Caller or Callee sends out the re-

INVITE for

T.38 or Fax Pass Through.

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)

SRTP Mode

Default is Disabled. Other options are Enabled but not forced, and Enabled and

forced.

It uses SDP Security Description to exchange key. Please refer

SDES: http://www.apps.ietf.org/rfc/rfc4568.html

SRTP: http://www.apps.ietf.org/rfc/rfc3711.html

SLIC Setting

Depends on standard phone type (and location)

Caller ID Scheme

Select the value according to the local Telco standard where the GXW40XX 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 GXW40XX uses this method for

signaling call termination. Default is No.

Loop Current

Disconnect duration

Default is 200. In 100 - 1 0000 milliseconds range.

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Grandstream Networks GXW40XX User Manual Page 34

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