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Grandstream Networks GXW42XX series - Page 46

Grandstream Networks GXW42XX series
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FIRMWARE 1.0.4.4 GXW42XX USER MANUAL PAGE 46 OF 57
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.
Use First
Matching Vocoder
in 200OK SDP
Default is No. If set to “Yes”, device will include only the first match vocoder in its 200OK
response, otherwise it will include all match vocoders in same order received in INVITE.
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
Silence
Suppression
(VAD)
Default is No. VAD allows detecting the absence of audio and conserve bandwidth by
preventing the transmission of "silent packets" over the network.
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 - 1 0000 milliseconds range.

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