Grandstream Networks GXW400x User Manual page 30
Analog ip gateway gxw400 series 4 or 8 fxs ports
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Also See for GXW400x:
- User manual (78 pages) ,
- Configuration manual (26 pages) ,
- Quick installation manual (7 pages)
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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
Default is Callee. This decides whether Caller or Callee sends out the re-INVITE for T.38 or
Detection Mode
Fax Pass Through.
Jitter Buffer Type
Select either Fixed or Adaptive based on network conditions.
Jitter Buffer
Select Low, Medium or High based on network conditions.
Length
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:
SRTP:
SLIC Setting
Depends on standard phone type (and location)
Caller ID Scheme
• Bellcore/Telcordia
• ETSI-DTMF
• ETSI-FSK
• SIN 227 - BT
• NTT Japan
Polarity Reversal
Default is No. If set to "Yes", polarity will be reversed upon call establishment and
termination.
Loop Current
Set to Yes if the traditional PBX you are using with GXW400x uses this method for signaling
Disconnect
call termination. Default is No.
Loop Current
Default is 200. In 100 - 1 0000 milliseconds range.
Disconnect
duration
Hook Flash timing
Time period when the cradle is pressed (Hook Flash) to simulate FLASH. To prevent
unwanted activation of the Flash/Hold and automatic phone ring-back, adjust this time value.
On Hook Timing
On-hook timing is the minimum time for an on-hook event to be validated.
Gain
Handset volume adjustment. RX is for receiving volume (direction FXS to analog phone),
TX is for transmission volume(Analog phone
parameters. Loudest volume: +6dB Lowest volume: -6dB.
Ring Tones
Configure ring cadences according to preference.
Grandstream Networks, Inc.
http://tools.ietf.org/id/draft-ietf-mmusic-sdescriptions-12.txt
http://www.apps.ietf.org/rfc/rfc3711.html
GXW400x User Manual
Firmware 1.0.0.67
to FXS). Default values are 0dB for both
Last Updated: 10/2007
Page 30 of 35
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