Grandstream Networks HT801 Administration Manual page 32

Identifies maximum retransmission interval for non-INVITE requests and INVITE
SIP T2 Interval
responses. Retransmitting and doubling of T1 continues until it reaches T2 value.
Default is 4 seconds.
Configure the SIP Timer D defined in RFC3261. 0 - 64 seconds. Default 0
SIP Timer D
DTMF Payload Defines payload type for DTMF using RFC2833.
Type
Preferred DTMF Sorts DTMF methods (in-audio, via RTP (RFC2833) or via SIP INFO) by priority.
method (in order)
Disable DTMF Uses above DTMF order without negotiation. Default is No.
Negotiation
Generate When enabled the RFC2833 events are generated until key is released. Default is No.
Continuous
RFC2833 Events
Send Hook Flash Default is No. If set to yes, flash will be sent as DTMF event.
Event
Flash Digit Control Overrides the default settings for call control when both channels are in use
Enable Call Enables do not disturb, call forward and other call features via the local feature codes
Features on the base. Otherwise, ITSP feature codes can be used. Default is Yes.
Off Hook Auto Dial
Configures a user ID or extension number that is automatically dialed when off-hook.
Only the user part of a SIP address needs to be entered. The HT801 will automatically
append the "@" and the host portion of the corresponding SIP address.
Off Hook Auto Dial Specifies the auto-dial delay after off hook.
Delay
Proxy-Require Determines a SIP Extension to notify the SIP server that the HT801 is behind a
NAT/Firewall.
Use NAT IP Defines NAT IP address used in SIP/SDP messages. It should only be used if required
by ITSP.
Use SIP User Agent Configures the SIP User-Agent Header.
Header
Distinctive Ring Customizes the Ring Tone 1 to 3 with associate caller ID: when selected, if caller ID is
configured, then the device will ONLY use this ring tone when the incoming call is from
Tone
HT801 Administration Guide
P a g e | 31