User manual

FIRMWARE VERSION 1.0.7.3 HT70X USER MANUAL Page 43 of 52
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.
Voice Frames per TX
Default is 2. Defines the number of voice frames sent in each packet.
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 i
nbound 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)
transmission mode.
Select between Disabled, Enabled but not Forced, and Enabled
and Forced. Default is Disabled.
SLIC Setting
Dependent on standard phone type (and location)
Caller ID Scheme
Bellcore/Telcordia, ETSI-FSK, ETSI-DTMF, SIN 227 – BT, & NTT Japan, Brazil
DTMF Caller ID Tone
Define the Start Tone and Stop Tone.
Polarity Reversal
Default is No. If set to “Yes”, polarity will be reversed upon call establishment and
termination.
Loop Current
Disconnect
Default is No. Set it to Yes if the traditional PBX you are using with HT70X uses this
method for signaling call termination. Method initiates short voltage drop on the line
when remote (VoIP) side disconnects an active call.
Loop Current
Disconnect Duration
Default value is 200. Here can be configured duration of such voltage drop described in
topic above. HT70X supports a Duration Range from 100 to 10000 ms.
Enable Hook Flash
Default is Yes. If set to “No”, FLASH button could only be used for terminating calls.
Hook Flash Timing
Time period when the cradle is pressed (Hook Flash) to simulate FLASH. To prevent