Grandstream Networks HT801 Administration Manual page 36

Uses session timer when making outbound calls if remote party supports it. Default is
Caller Request
Timer No.
Callee Request Uses session timer when receiving inbound calls with session timer request. Default is
Timer No.
Force Timer Uses session timer even if the remote party does not support this feature. Selecting "No"
will enable session timer only when the remote party supports it. Default is No.
To turn off Session Timer, select "No" for Caller and Callee Request Timer, and Force
Timer.
UAC Specify Specifies which end will act as refresher for outgoing calls. Default is Omit.:
Refresher
UAS Specify Specifies which end will act as refresher for incoming calls. Default is Omit.:
Refresher
Force INVITE Uses INVITE message to refresh the session timer. Default is No.
Enable 100rel Appends "100rel" attribute to the value of the required header of the initial signaling
messages. Default is No.
Add Auth Header on Adds "Authentication" header with blank "nonce" attribute in the initial SIP REGISTER
Initial REGISTER request. Default is No.
Use First Matching Includes only the first matching vocoder in its 200OK response, otherwise it will include
Vocoder in 200OK all matching vocoders in same order received in INVITE. Default is No.
SDP
Preferred Vocoder Configures vocoders in a preference list (up to 7 preferred vocoders) that will be
included with same order in SDP message. Vocoder types are G.711 A-/U-law, G.722,
G.726-32, G.723, G.729, iLBC and OPUS
Voice Frames per Transmits a specific number of voice frames per packet. Default is 2; increases to
TX 10/20/32/64 for G711/G726/G723/other codecs respectively.
Operates at specified encoding rate for G.723 vocoder. Available encoding rates are
G723 Rate
6.3kbps or 5.3kbps. Default is 6.3kbps.
iLBC Frame Size Specifies iLBC packet frame size (20ms or 30ms). Default is 20ms.
Disable OPUS Disables OPUS stereo in SDP. Default is No.
Stereo in SDP

UAC: The handy tone acts as the refresher.

UAS: Callee or proxy server act as the refresher.

UAS: The handy tone acts as the refresher.

UAC: Callee or proxy server act as the refresher.
HT801 Administration Guide
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