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UAC Specify Refresher
UAS Specify Refresher
Force INVITE
Invite Ring-No-Answer
Timeout
Enable 100rel
Preferred Vocoder
Voice frame per TX
G723 Rate:
iLBC Frame Size:
iLBC Payload Type:
FIRMWARE VERSION 1.0.12.4
To turn off Session Timer, select "No" for Caller Request Timer, Callee Request Timer,
and Force Timer.
As a Caller, select UAC to use the phone as the refresher, or UAS to use the Callee or
proxy server as the refresher.
As a Callee, select UAC to use caller or proxy server as the refresher, or UAS to use
the phone as the refresher.
Session Timer can be refreshed using INVITE method or UPDATE method. Select
"Yes" to use INVITE method to refresh the session timer.
Default is 40 seconds, the range is between 5 and 300 seconds.
The use of the PRACK (Provisional Acknowledgement) method enables reliability to be
offered to SIP provisional responses (1xx series). This is very important if PSTN inter-
networking is to be supported. A user's request to use reliable provisional responses is
invoked by the 100rel tag which is appended to the value of the required header of
initial signalling messages.
The HT503 supports up to 5 different Vocoder types including G.711 A-/U-law, G.726
(Supports bit rates 16, 24, 32 and 40), G.723.1, G.729A/B/E and 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".
This field contains the number of voice frames to be transmitted in a single packet.
When setting this value, the user should be aware of the requested packet time (used
in SDP message) as a result of configuring this parameter. This parameter is
associated with the first vocoder in the above vocoder Preference List or the actual
used payload type negotiated between the 2 conversation parties at run time.
Default is 2, from 1 to 4 for G711/G726/G729 only
For example, if this field is set to be 2 and if the first vocoder chosen is G729 or G711
or G726, then the "ptime" value in the SDP message of an INVITE request will be 20ms
(2 x10ms)
If the configured voice frames per TX exceeds the maximum allowed value, the ATA will
not accept it and will use and save the precedent configured allowed value for the
corresponding first vocoder choice.
This defines the encoding rate for G723 vocoder. Default setting is 6.3kbps.
This sets the iLBC size in 20ms or 30ms
This defines payload type for iLBC. Default value is 97. The valid range is between 96
HT503 USER MANUAL
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