Grandstream Networks HT818 Administration Manual page 38

SIP T1 Timeout Defines T1 timeout value. It is an estimate of the round-trip time between the client and
server transactions. For example, the HT818 will attempt to send a request to a SIP
server. The time it takes between sending out the request to the point of getting a
response is the SIP T1 timer. If no response is received the timeout is increased to (2*T1)
and then (4*T1). Request re-transmit retries would continue until a maximum amount of
time defined by T2.
Default is 0.5 seconds.
SIP T2 Interval Identifies maximum retransmission interval for non-INVITE requests and INVITE
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.
Negotiation Default is No.
Generate When enabled the RFC2833 events are generated until key is released.
Continuous Default is No.
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 on
Features 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 HT818 will automatically
append the "@" and the host portion of the corresponding SIP address.
•
Disabled: When set to "Disabled", all incoming calls are displayed with
"Unavailable".
•
From Header: When set to "From Header", the HT818 will use the FROM header
to display the caller ID.
HT818 Administration Guide
Version 1.0.9.3
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