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FIRMWARE VERSION 1.0.3.1 HT70X USER MANUAL Page 42 of 52
Force INVITE
Session Timer can be refreshed using INVITE method or UPDATE method. Select
“Yes” to use INVITE method to refresh the session timer. Default is No,
Send Re-INVITE After
Fax
Default is No, If set to “Yes”, device will send an INVITE with audio vocoders upon
completion of Fax to continue session in audio only.
Enable Silence
Detection for Fax
Disconnect
For fax machines that do not send a Disconnect when fax is done. This option
Enables/Disables the detection of silence in order to know the fax has finished. The
silence period is non-configurable and fixed to 7 seconds. Default is No,
Enable 100rel
Default is No, If set to Yes, Enables the use of PRACK (Provisional Acknowledgment)
method.
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.
Preferred Vocoder
The HT70X supports up to 5 different Vocoder types including G.711 A-/U-law, G.726-
32, G.723.1, G.729A/B/E, iLBC. The user can configure Vocoders in a preference list
that will be included with the same preference order in SDP message. The first
Vocoder is entered by choosing the appropriate option in “Choice 1”. The last Vocoder
is entered by choosing the appropriate option in “Choice 8”.
Vocoder types can also be changed per call basis by using a star code. Please see the
“Call features” section.
G723 Rate
Default is 6.3kbps. Defines the encoding rate for G.723.1 vocoder.
iLBC Frame Size
Default is 20ms. Sets the iLBC frame size in 20ms or 30ms.
iLBC Payload type
Defines payload type for iLBC. Default value is 97. The valid range is between 96 and
127.
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)
Re-Invite after Fax Tone
Detection Mode
Default is Enabled. It makes the unit send out the re-INVITE for T.38 or Fax Pass
Through if a fax tone is detected.
Jitter Buffer Type
Select either Fixed or Adaptive based on network conditions. Default is Adaptive.
Jitter Buffer Length
Select Low, Medium or High based on network conditions. Default is Medium.
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
This option defines different implementation of support SRTP (squired RTP)