Grandstream Networks HT503 FXO User Manual page 48

Force Timer
UAC Specify Refresher
UAS Specify Refresher
Send Re-INVITE After
Fax
Enable Silence
Detection for Fax
Disconnect
Enable 100rel
Use First Matching
Vocoder in 200OK SDP
Force INVITE
Preferred Vocoder
Voice Frames per TX
FIRMWARE VERSION 1.0.12.4
session timer request.
If selecting "Yes" the phone will use session timer even if the remote party does not
support this feature. Selecting "No" will allow the phone to enable session timer only
when the remote party support this feature.
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.
Default is No, If set to "Yes", device will send an INVITE with audio vocoders upon
completition of Fax to continue session in audio only.
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.
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 signaling messages.
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.
Session Timer can be refreshed using INVITE method or UPDATE method. Select
"Yes" to use INVITE method to refresh the session timer.
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
HT503 USER MANUAL
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