Grandstream Networks HT818 Administration Manual page 43

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 Adds "Authentication" header with blank "nonce" attribute in the initial SIP REGISTER
on Initial REGISTER request. Default is No.
Conference URI
Allows users to manually configure the conference URL. The default is null.
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 8 preferred vocoders) that will be included
with same order in SDP message. Vocoder types are G.711 A-/U-law, 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.
G723 Rate Operates at specified encoding rate for G.723 vocoder. Available encoding rates are
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
iLBC Payload type Determines payload type for iLBC. The valid range is between 96 and 127. Default is 97.
OPUS Payload Determines payload type for OPUS. The valid range is between 96 and 127. Default is
Type 123.
VAD Allows detecting the absence of audio and conserves bandwidth by preventing the
transmission of "silent packets" over the network.
Default is No.
Symmetric RTP Changes the destination to send RTP packets to the source IP address and port of the
inbound RTP packet last received by the device. Default is No.
•
UAS: The HandyTone acts as the refresher.
•
UAC: Callee or proxy server act as the refresher.
HT818 Administration Guide
Version 1.0.9.3
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