Crypto life time – Grandstream GXW400x User Manual User Manual
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FIRMWARE VERSION 1.0.14.1 GXW400X USER MANUAL Page 52 of 60
VAD
Default is No. VAD allows detecting 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 port 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
SRT
Crypto Life Time
Default is Enabled. Allows user to enable or disable Crypto life time when using SRTP.
SLIC Setting
Depends on standard phone type (and location).
Caller ID Scheme
Select the value according to the local Telco standard where the GXW400X 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 GXW400X uses this method for
signaling call termination. Default is No.
Play busy/reorder tone
before Loop Current
Disconnect
Default is No. If set to Yes, it will play busy/reorder tone before loop current disconnect
upon call fail.