Grandstream Networks HT801 Administration Manual page 30

Enables SIP OPTIONS to track account registration status so the phone will send
Enable SIP
OPTIONS Keep periodic OPTIONS message to server to track the connection status with the server.
Alive Default setting is "No".
SIP OPTIONS Keep Configures the time interval when the phone adapter send OPTIONS message to SIP
Alive Interval server. The default setting is 30 seconds, which means the phone adapter will send an
OPTIONS message to the server every 30 seconds. The default range is 1-64800.
SIP OPTIONS Keep Defines the Number of max lost packets for SIP OPTIONS Keep Alive before re-
Alive Max Lost registration. Between 3-10, default is 3.
Layer 3 QoS Defines Diff-Serv values for SIP and RTP. Defaults are:
SIP Diff-Serv: 26 / RTP Diff-Serv: 46.
Defines local port to use by the HT801 for listening and transmitting SIP packets. Default
Local SIP Port
value for FXS is 5060.
Defines the local RTP-RTCP port pair the HT801 will listen and transmit. It is the HT801
Local RTP Port
RTP port for channel 0. The default value for FXS port is 5004.
Use Random SIP Controls whether to use configured or random SIP ports. This is usually necessary when
Port multiple HT801 are behind the same NAT. Default is No.
Use Random Controls whether to use configured or random RTP ports. This is usually necessary
RTP Port when multiple HT801 are behind the same NAT. Default is No.
Hold Target Allows user to hold the phone call before refer it. If set to No, the call will not be hold
Before Refer before referred. Default is Yes.
Refer-To Use Includes target's "Contact" header information in "Refer-To" header when using
Target Contact attended transfer. Default is No.
Transfer on
If set to "Yes", when the phone hangs up as the conference initiator, the conference call
Conference Hang-
will be transferred to the other parties so that other parties will remain in the conference
up
call. Default setting is No.
Gives the users the possibility of making conference calls by pressing "Flash" key, when
Disable Bellcore
Style 3-Way it's enabled by dialing *23 +second callee number. Default is No
Conference
Remove OBP from Removes outbound proxy info in "Route" header when sending SIP packets. Default is
Route Header No.
Support SIP Includes "SIP Instance ID" attribute to "Contact" header in REGISTER request as
Instance ID defined in IETF SIP outbound draft. Default is No.
HT801 Administration Guide
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